European Solar Physics Online Seminar Archive

Following an initiative by the University of Oslo the MPS will participate in the "European Solar Physics Online Seminar" series (ESPOS). Details can be found here: https://folk.uio.no/tiago/espos/
The aim of this video conference series is to promote ideas more widely with a specialized audience, and give some exposure to cutting-edge research for students and other young researchers that do not regularly travel to conferences. The ESPOS series is planned to take place every second Thursday at 11am.

ESPOS: European Solar Physics Online Seminar (Clara Froment)

ESPOS: ESPOS
  • Date: Apr 27, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Clara Froment
  • Location: Oslo (broadcasted at MPS)
  • Room: seminar rooms D + E +F
  • Host: Andreas Lagg
[more]

ESPOS - European Solar Physics Online Seminar: Theoretical Foundation of 3D Alfven Resonances: Time Dependent Solutions (T. Elsden)

ESPOS
  • Date: Apr 27, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Thomas Elsden
  • University of St Andrews, Scotland, UK
  • Location: St Andrews (broadcasted at MPS)
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
The coupling of fast and Alfven magnetohydrodynamic (MHD) waves is of fundamental interest in astrophysical plasmas. Under certain conditions, Alfven waves can be resonantly excited by fast mode ... [more]

ESP Online Seminar: Magnetic field variations associated with umbral flashes and penumbral waves (J. Joshi)

ESPOS
  • Date: May 18, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Jayant Joshi
  • Stockholm University, Stockholm, Sweden
  • Location: Stockholm (broadcasted at MPS)
  • Room: Hydra
  • Host: Andreas Lagg
Oscillations in sunspots have been extensively studied for several decades. Most of the research conducted about sunspot oscillations has focussed around variations in Doppler velocities and ... [more]

ESP Online Seminar: Formation of the penumbra and start of the Evershed Flow (M. Murabito)

ESPOS
  • Date: Aug 31, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Mariarita Murabito
  • University of Catania & Catania Astrophysical Observatory, Italy
  • Location: Catania (broadcasted at MPS)
  • Room: Hydra
  • Host: Andreas Lagg
Penumbral formation is a significant part of the flux emergence process. Despite the new advanced techniques in observations and simulations, there are still processes that need to be clarified. In ... [more]

ESP Online Seminar: Deep Learning in Solar Physics (A. Asensio Ramos)

ESPOS
  • Date: Sep 14, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Andrés Asensio Ramos
  • Instituto de Astrofisica (IAC), La Laguna, Tenerife, Spain
  • Location: La Laguna, Tenerifa (broadcasted at MPS
  • Room: Aquila + Bottes
  • Host: Andreas Lagg
Deep learning has emerged as a very powerful set of techniques to extract relevant information from observations, sometimes showing much better results that other set of finely tuned algorithms. In ... [more]

ESP Online Seminar: Spectropolarimetric diagnostics using Sodium D lines (I.Milic)

ESPOS
  • Date: Sep 28, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Ivan Milic
  • MPS
  • Location: Goettingen, Germany (boradcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
In this talk we will focus on diagnostic potential of the spectral region around D lines of Sodium. We will first outline our approach to non-lte inversions, and present a method for computation of ... [more]

ESP Online Seminar: Interface Region Imaging Spectrograph views of how the solar (B. de Pontieu) atmosphere is energized

ESPOS
  • Date: Nov 30, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Bart de Pontieu
  • Lockheed Martin Solar & Astrophysics Laboratory
  • Location: Lockheed Martin Solar & Astrophysics Laboratory (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
At the interface between the Sun's surface and million-degree outer atmosphere or corona lies the chromosphere. At 10,000K it is much cooler than the corona, but also many orders of magnitude denser ... [more]

ESP Online Seminar: Ca II 8542 Å Brightenings Induced by a Solar Microflare (C. Kuckein)

ESPOS
  • Date: Dec 7, 2017
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Bart de Pontieu
  • Leibniz Institute for Astrophysics Potsdam (AIP)
  • Location: Leibniz Institute for Astrophysics Potsdam (AIP) broadcasted on MPS
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
We study small-scale brightenings in Ca II 8542 Å line-core images to determine their nature and effect on localized heating and mass transfer in active regions. To that end, we analyzed ... [more]

ESP Online Seminar: On the Importance of Non-equilibrium Ionisation. Understanding (D. Nobrega Siverio) the Enhanced Emissivity of Si IV and O IV in Solar Surges

ESPOS
  • Date: Jan 11, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Daniel Nóbrega-Siverio
  • Instituto de Astrofisica (IAC), La Laguna, Tenerife, Spain
  • Location: Instituto de Astrofisica (IAC), La Laguna, Tenerife, Spain (broadcasted on MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
Surges are ubiquitous cool ejections in the solar atmosphere that often appear associated with other interesting phenomena such as UV bursts or coronal jets. Recent observations from the Interface ... [more]

ESP Online Seminar: The Magnetic Nature of the Umbra-Penumbra Boundary in Sunspots (J. Jurčák)

ESPOS
  • Date: Jan 25, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Jan Jurčák
  • Astronomical Institute of the Czech Academy of Sciences
  • Location: Astronomical Institute of the Czech Academy of Sciences (broadcasted at MPS)
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
Sunspots are the longest known manifestation of solar activity and their magnetic nature has been known for more than a century. Despite this, the boundary between umbrae and penumbrae, the two ... [more]

ESP Online Seminar: Dissecting bombs and bursts: inversions of reconnection events in SST-IRIS observations (G. Vissers)

ESPOS
  • Date: Feb 8, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Gregal Vissers
  • Institute for Solar Physics, Stockholm University, Sweden
  • Location: Institute for Solar Physics, Stockholm University (broadcasted at MPS)
  • Room: Cygnus + Draco
  • Host: Andreas Lagg
Ellerman bombs and UV bursts are transient brightenings that are ubiquitously observed in the lower atmospheres of active and emerging flux regions. While some Ellerman bombs display clear UV burst ... [more]

ESP Online Seminar: What can numerical simulations tell us about the mechanism of solar and stellar activity? (J. Warnecke)

ESPOS
  • Date: Feb 22, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Gregal Vissers
  • Max Planck Institute for Solar System Research, Göttingen, Germany
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Auditorium
  • Host: Andreas Lagg
The magnetic field in the Sun undergoes a cyclic modulation with a reversal typically every 11 years due to a dynamo operating under the surface. Also, other solar-like stars exhibit magnetic ... [more]

ESP Online Seminar: Frequency-dependent Damping of Slow Magneto-acoustic Waves in Sunspots (K. Prasad )

ESPOS
  • Date: Feb 22, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Gregal Vissers
  • Queen's University Belfast
  • Location: Queen's University Belfast (broadcasted on MPS)
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
Propagating slow magneto-acoustic waves are regularly observed in the solar corona, particularly in sunspot related loop structures. These waves exhibit rapid damping as they propagate along the ... [more]

ESP Online Seminar: Recurrent CME-like Eruptions in Flux Emergence Simulations (P. Syntelis)

ESPOS
  • Date: Mar 22, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Petros Syntelis
  • St. Andrews University, Scotland, UK
  • Location: St. Andrews University, Scotland, UK (broadcasted at MPS)
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
Ellerman bombs and UV bursts are transient brightenings that are ubiquitously observed in the lower atmospheres of active and emerging flux regions. While some Ellerman bombs display clear UV burst ... [more]

ESP Online Seminar: Search for predicted periodic flows in loops undergoing thermal non-equilibrium (G. Pelouze)

ESPOS
  • Date: Apr 12, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Gabriel Pelouze
  • Institut d'Astrophysique Spatiale, IT
  • Location: Institut d'Astrophysique Spatiale (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
Long-period intensity pulsations have been recently detected in coronal loops with EUV images of both SoHO/EIT (Auchère et al., 2014) and SDO/AIA (Froment et al., 2015). These pulsations have been ... [more]

ESP Online Seminar: Counter-streaming Flows of a Giant Solar Filament as Observed in the Extreme Ultraviolet (A. Dierke)

ESPOS
  • Date: Apr 19, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Andrea Dierke
  • Leibniz Institut for Astrophysics Potsdam (AIP)
  • Location: Leibniz Institute for Astrophysics Potsdam (AIP) broadcasted on MPS
  • Room: Aquila, Bootes, Cygnus
  • Host: Andreas Lagg
A giant solar filament was visible on the solar surface between 8-23 November 2011. The filament stretched over more than half a solar diameter. Multi-wavelength data from the SDO instrument AIA ... [more]

ESP Online Seminar: Interactions between pre-existing and emerging magnetic flux systems observed with IRIS (S. Guglielmino)

ESPOS
  • Date: May 3, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Salvo Guglielmino
  • Osservatorio Astrofisico di Catania
  • Location: Osservatorio Astrofisico di Catania (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
We report multi-wavelength ultraviolet observations taken with the IRIS satellite, concerning the emergence phase in the upper chromosphere and transition region of an emerging flux region (EFR) ... [more]

ESP Online Seminar: Searching for the Origin of Flares in M dwarfs (L. Doyle)

ESPOS
  • Date: Jun 14, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Lauren Doyle
  • Armagh Observatory, Armagh, UK
  • Location: Armagh Observatory, Armagh, UK (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
We present an overview of K2 short cadence observations for 32 M dwarfswhich have spectral types between M0-L1. All of the stars in our sampleshowed flares with the most energetic reaching 3x10^34 ... [more]

ESP Online Seminar: The spectral content of SDO/AIA 1600 and 1700 Å filters from flare and plage observations (P. Simões)

ESPOS
  • Date: Sep 6, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Paulo Simões
  • University of Glasgow
  • Location: University of Glasgow (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
The strong enhancement of the ultraviolet emission during solar flares is usually taken as an indication of plasma heating in the low solar atmosphere caused by the deposition of the energy released ... [more]

ESP Online Seminar: Multi-height spectropolarimetric study of MHD waves in a big sunspot observed with IBIS (M. Stangalini)

ESPOS
  • Date: Sep 20, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Marco Stangalini
  • INAF-OAR National Institute for Astrophysics, Rome, Italy
  • Location: University of Glasgow (broadcasted at MPS)
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
We present preliminary results derived from the analysis of spectropolarimetric measurements of active region AR12546, which represents one of the largest sunspots to have emerged onto the solar ... [more]

ESP Online Seminar: Surface waves and instabilities in the presence of an inclined magnetic field (E. Vickers)

ESPOS
  • Date: Oct 4, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Eleanor Vickers
  • Plasma Dynamics Group, University of Sheffield
  • Location: Plasma Dynamics Group, University of Sheffield (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
While surface waves propagating at tangential discontinuities have been studied in great detail, few studies have been dedicated to the investigation of the nature of waves at contact discontinuities ... [more]

ESP Online Seminar: Asymmetric Solar Waveguides: Theory and Observations (M. Allcock)

ESPOS
  • Date: Nov 15, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Matthew Allcock
  • Solar Physics and Space Plasma Research Centre, University of Sheffield
  • Location: Plasma Dynamics Group, University of Sheffield (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
Are solar MHD waveguides symmetric? It is convenient to assume that they are. The solar physics community is familiar with the traditional notion of sausage and kink waves, which propagate along ... [more]

ESP Online Seminar: Ellerman bombs and UV bursts: reconnection at different atmospheric layers? (A. Ortiz)

ESPOS
  • Date: Nov 29, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Ada Ortiz
  • University of Oslo, Institute of Theoretical Astrophysics
  • Location: University of Oslo Institute of Theoretical Astrophysics (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
The emergence of magnetic flux through the photosphere and into the outer solar atmosphere produces, amongst many other phenomena, the appearance of Ellerman bombs (EBs) in the photosphere. EBs are ... [more]

ESP Online Seminar: The association of RHESSI flares to the Hale Sector Boundary and Active Longitudes (K. Loumou)

ESPOS
  • Date: Dec 13, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Konstantina Loumou
  • University of Glasgow
  • Location: University of Glasgow (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
Are some parts of the Interplanetary Magnetic Field’s (IMF) neutral line more flare energetic than others? What are Hale Sector Boundaries (HSBs) and are they connected with flares? Do they have ... [more]

ESP Online Seminar: A new method for measuring the Wilson depression of sunspots (Björn Löptien)

ESPOS
  • Date: Dec 28, 2018
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Björn Löptien
  • MPS
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Auditorium
  • Host: Andreas Lagg
The Wilson depression is the difference in geometric height of the layer of unit continuum optical depth between the sunspot umbra and the quiet Sun. Measuring the Wilson depression is important for ... [more]

ESP Online Seminar: Imaging of the solar atmosphere in the centimetre-millimeter band through Single-Dish observations (G. Murtas)

ESPOS
  • Date: Jan 31, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Giulia Murtas
  • University of Exeter
  • Location: University of Exeter (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
Solar observations offer both a rich interdisciplinary laboratory on fundamental astrophysics and precious tools for Space Weather applications. The involved plasma processes determine a complex radio ... [more]

ESP Online Seminar: Chromospheric observations and magnetic configuration of a supergranular structure (Carolina Robustini)

ESPOS
  • Date: Feb 14, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Carolina Robustini
  • Stockholm University
  • Location: Institute for Solar Physics, Stockholm University (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
We present high spatial resolution narrow-band images in three different chromospheric spectral lines, including Ca II K with the new CHROMospheric Imaging Spectrometer installed at the Swedish 1-m ... [more]

ESP Online Seminar: Emerging bipolar magnetic pairs in the solar photosphere: diffusion properties and contribution to the coronal heating (Luca Giovannelli)

ESPOS
  • Date: Mar 14, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Luca Giovannelli
  • University of Rome Tor Vergata
  • Location: University of Rome Tor Vergata (broadcasted at MPS)
  • Room: Aquila + Bootes
  • Host: Andreas Lagg
The ubiquitous presence of small magnetic elements in the Quiet Sun represents a prominent coupling between the photosphere and the upper layers of the Sun’s atmosphere. Small magnetic element ... [more]

ESP Online Seminar: 3D Whole-Prominence Fine Structure models: the current state of the affairs (Stanislav Gunár)

ESPOS
  • Date: Mar 28, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Stanislav Gunár
  • Astronomical Institute of the Czech Academy of Sciences
  • Location: Astronomical Institute of the Czech Academy of Sciences (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
To understand the links between the distribution of the prominence plasma, the configuration of its magnetic field and the observations of prominence/filament fine structures obtained in UV/EUV ... [more]

ESP Online Seminar: The Sun from Coimbra: history, recent results and perspectives (João Fernandes)

ESPOS
  • Date: Apr 11, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: João Fernandes
  • University of Coimbra, Portugal
  • Location: University of Coimbra, Portugal (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
The Astronomical Observatory of the Coimbra University has a collection of solar observations on a daily basis, since 1926. We obtain regular observations of the full solar disk using a classical ... [more]

ESP Online Seminar: 2D and 3D Kinematic Analysis of an Ideal-MHD Prominence Eruption (Thomas Rees-Crockford)

ESPOS
  • Date: Apr 25, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Thomas Rees-Crockford
  • Northumbria University, Newcastle upon Tyne, England
  • Location: Northumbria University (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
We carry out multi-dimensional kinematic analysis of a prominence eruption in order to characterise the role of eruptive ideal-MHD instabilities. Using SDO/AIA and STEREO/EUVI-A we reconstruct the ... [more]

ESP Online Seminar: Formation and morphology of solar circular polarization with dichroism, atomic polarization and velocity gradients (Edgar S. Carlin)

ESPOS
  • Date: May 9, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Edgar S. Carlin
  • Instituto de Astrofísica de Canarias, Tenefrife, Spain
  • Location: Instituto de Astrofísica de Canarias (broadcasted at MPS)
  • Room: Auditorium
  • Host: Andreas Lagg
Since the work of Carlin et al. (2012), more studies have investigated, with the help of MHD models of the solar chromosphere, the behavior of scattering linear polarization (LP) in presence of ... [more]

ESP Online Seminar: Emergence of small-scale magnetic flux in the quiet Sun, observed from the photosphere to the corona (Ioannis Kontogiannis)

ESPOS
  • Date: Jun 20, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Ioannis Kontogiannis
  • Leibniz-Institut für Astrophysik Potsdam, AIP
  • Location: Instituto de Astrofísica de Canarias (broadcasted at MPS)
  • Room: Online only
  • Host: AIP
[more]

ESP Online Seminar: Swirls and Alfvén pulses in the Solar Atmosphere (JiaJia Liu)

ESPOS
  • Date: Sep 12, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: JiaJia Liu
  • University of Sheffield, Solar Physics and Space Plasma Research Centre
  • Location: Plasma Dynamics Group, University of Sheffield (broadcasted at MPS)
  • Room: Seminar rooms Aquila + Bootes
  • Host: Andreas Lagg
[more]

ESP Online Seminar: The largest flares of solar cycle 24 as potential clues for stellar superflares (Paolo Romano)

ESPOS
  • Date: Sep 26, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Paolo Romano
  • University of Catania / INAF - Catania Astrophysical Observatory
  • Location: University of Catania / INAF - Catania Astrophysical Observatory (broadcasted at MPS)
  • Room: Seminar rooms Cygnus + Draco
  • Host: Pradeep Chitta
[more]

ESP Online Seminar: Nonequilibrium ionization and ambipolar diffusion in magnetic flux emergence processes (Daniel Nóbrega-Siverio)

ESPOS
  • Date: Oct 10, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Daniel Nóbrega-Siverio
  • Rosseland Centre for Solar Physics, University of Oslo
  • Location: Rosseland Centre for Solar Physics, University of Oslo (broadcasted at MPS)
  • Room: Seminar rooms Aquila + Bootes
  • Host: Pradeep Chitta
[more]

ESP Online Seminar: Eruptions and flaring activity in emerging quadrupolar regions (Petros Syntelis)

ESPOS
  • Date: Oct 24, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Petros Syntelis
  • Solar and Magnetospheric Theory Group, University of St Andrews
  • Location: University of St Andrews broadcasted at MPS
  • Room: Seminar room Gemini
  • Host: Pradeep Chitta
[more]

ESP Online Seminar: MHD wave modes in the solar magnetic flux tubes with elliptical cross-section (Anwar Ali Aldhafeeri)

ESPOS
  • Date: Nov 7, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Anwar Ali Aldhafeeri
  • Plasma Dynamics Group, The University of Sheffield
  • Location: The University of Sheffield (broadcasted at MPS)
  • Room: Seminar room Gemini
  • Host: Pradeep Chitta
[more]

ESP Online Seminar: Spectral diagnostics of cool flare loops observed by SST (Julius Koza)

ESPOS
  • Date: Nov 7, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Julius Koza
  • Astronomical Institute, Slovak Academy of Sciences
  • Location: Astronomical Institute, Slovak Academy of Sciences (broadcasted at MPS)
  • Room: Seminar room Gemini
  • Host: Pradeep Chitta
[more]

ESP Online Seminar: Penumbral brightening events (Mariarita Murabito)

ESPOS
  • Date: Dec 5, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Mariarita Murabito
  • INAF-OAR National Institute for Astrophysics, Italy
  • Location: INAF-OAR National Institute for Astrophysics, Italy (broadcasted at MPS)
  • Room: Seminar rooms Aquila + Bootes
  • Host: Pradeep Chitta
[more]

ESP Online Seminar: Solar irradiance variability and surface magnetism (Kok Leng Yeo)

ESPOS
  • Date: Dec 19, 2019
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Kok Leng Yeo
  • Max Planck Institue for Solar System Research (MPS)
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Auditorium
  • Host: Pradeep Chitta
The variation in solar irradiance is commonly assumed to be driven by its surface magnetism. Until recently, this assumption could not be verified conclusively as models of solar irradiance ... [more]

ESP Online Seminar: Magnetic Rayleigh–Taylor Unstable Plumes and Hybrid KH-RT Instability into a Loop-like Eruptive Prominence (Sudheer K. Mishra)

ESPOS
  • Date: Jan 23, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Sudheer K. Mishra
  • Department of Physics, Indian Institute of Technology (BHU), India
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Aquila + Bootes
  • Host: Pradeep Chitta
The magnetic Rayleigh–Taylor instability is a fundamental MHD instability and recent observations show that this instability develops in the solar prominences. We analyze the observations from Solar ... [more]

ESP Online Seminar: Learning to Invert Solar Flares with RADYN Physics

ESPOS
  • Date: Feb 20, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: John Armstrong
  • University of Glasgow, UK
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Aquila + Bootes
  • Host: Pradeep Chitta
During a solar flare, it is believed that reconnection takes place in the corona followed by fast energy transport to the chromosphere. The resulting intense heating strongly disturbs the ... [more]

ESP Online Seminar: Learning to Invert Solar Flares with RADYN Physics

ESPOS
  • Date: Feb 20, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: John Armstrong
  • University of Glasgow, UK
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Aquila + Bootes
  • Host: Pradeep Chitta
During a solar flare, it is believed that reconnection takes place in the corona followed by fast energy transport to the chromosphere. The resulting intense heating strongly disturbs the ... [more]

ESPOS Online Seminar: Magnetic properties of short-lived penumbral microjets (Azaymi Litzi Siu Tapi)

ESPOS
  • Date: Mar 5, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Azaymi Litzi Siu Tapia
  • Instituto de Astrofísica de Andalucía (IAA-CSIC), Spain
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Aquila + Bootes
  • Host: Pradeep Chitta
Studying the polarization properties of penumbral microjets that have the shortest durations requires spectropolarimetric observations with the fastest temporal cadence possible and is currently a ... [more]

ESP Online Seminar: Solar Flare Prediction Using Magnetic Field Diagnostics Above the Photosphere (Marianna Korsos)

ESPOS
  • Date: May 14, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Marianna Korsos
  • Aberystwyth University, UK
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Pradeep Chitta
We present the application of the weighted horizontal gradient of magnetic field (WGM) flare prediction method to 3D extrapolated magnetic configurations of flaring solar ARs. The main aim is to ... [more]

ESP Online Seminar: Understanding hooks of solar flare ribbons and the evolution of coronal mass ejections (Juraj Lorinčík)

ESPOS
  • Date: May 28, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Juraj Lorinčík
  • Astronomical Institute of the Czech Academy of Sciences
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Pradeep Chitta
Solar flares and eruptions are one of the most energetic phenomena occuring in the solar system. They are typically described by the cartoon-like 2D Standard model of solar flares. This model is ... [more]

ESP Online Seminar: Study of damping of propagating kink waves in the solar corona (Ajay Tiwari)

ESPOS
  • Date: Jun 11, 2020
  • Time: 11:00 AM - 12:00 PM (Local Time Germany)
  • Speaker: Ajay Tiwari
  • Northumbria University, Solar Physics group (UK)
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Pradeep Chitta
Propagating kink waves have been reported recently and have been found to be ubiquitous in the solar corona including in the quiet Sun. It is imperative to understand the mechanisms that enable their ... [more]

ESPOS Online Seminar: The solar atmosphere as observed through the Mg I b2 line at highspatial resolution (Azaymi Litzi Siu Tapia)

ESPOS
  • Date: Jun 3, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Azaymi Litzi Siu Tapia
  • Instituto de Astrofísica de Andalucía (IAA-CSIC), Spain
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Pradeep Chitta
The Mg I b2 line at 5173 Å forms over a large range of heights but itscore, which forms under conditions of non-local thermodynamicequilibrium, is most sensitive to heights near the temperature ... [more]

ESPOS Online Seminar: The solar atmosphere as observed through the Mg I b2 line at highspatial resolution (Azaymi Litzi Siu Tapia)

ESPOS
  • Date: Jun 3, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Azaymi Litzi Siu Tapia
  • Instituto de Astrofísica de Andalucía (IAA-CSIC), Spain
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Pradeep Chitta
The Mg I b2 line at 5173 Å forms over a large range of heights but itscore, which forms under conditions of non-local thermodynamicequilibrium, is most sensitive to heights near the temperature ... [more]

ESPOS Online Seminar: Polarization signatures during the X1.6 flare observed in active region NOAA 12192 (Fabiana Ferrente)

ESPOS
  • Date: Jul 1, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Fabiana Ferrente
  • University of Catania, Italy
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Pradeep Chitta
The X1.6 flare observed on 22 October 2014 (SOL2014-10-22T14:28) was among the strongest flares that occurred in the magnetically complex, great active region NOAA 12192. Despite the large amount of ... [more]

ESPOS Online Seminar: Shock-wave radio probing of solar wind sources in coronal magnetic fields (Artem Koval

ESPOS
  • Date: Jul 7, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Artem Koval
  • Astronomical Institute of the CAS, Czech Republic
  • Room: Zoom
  • Host: Shahin Jafarzadeh
The Space Weather effects in the near-Earth environment as well as in atmospheres of other terrestrial planets arise by corpuscular radiation from the Sun, known as the solar wind. The solar magnetic ... [more]

ESPOS Online Seminar: High-resolution spectroscopy of a minifilament eruption (Ioannis Kontogiannis)

ESPOS
  • Date: Oct 21, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Ioannis Kontogiannis
  • Leibniz-Institut für Astrophysik Potsdam (AIP), Germany
  • Room: Zoom
  • Host: Shahin Jafarzadeh
Minifilaments are miniature versions of filaments, first observed in H-alpha filtergrams of quiet Sun. Recent studies have showcased their association with small-scale eruptive events, highlighting ... [more]

ESPOS Online Seminar: Forecasting solar flares with a new topological parameter and a supervised machine-learning method (Luca Giovannelli)

ESPOS
  • Date: Nov 4, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Luca Giovannelli
  • Dipartimento di Fisica, Università degli Studi di Roma Tor Vergata
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Shahin Jafarzadeh
Solar flares originate from active regions (ARs) hosting complex and strong bipolar magnetic fluxes. Forecasting the probability of an AR to flare and defining reliable precursors of intense flares ... [more]

ESPOS Seminar: Test-particle simulations at tearing coronal null-point current sheets (Ross Pallister)

ESPOS
  • Date: Nov 18, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Ross Pallister
  • Solar and Space Physics group, Northumbria University, UK
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Shahin Jafarzadeh
Magnetic reconnection is widely accepted to be a major contributor to nonthermal particle acceleration in the solar atmosphere. We investigate particle acceleration in two evolving field geometries ... [more]

ESPOS Seminar: Role of Heating-Cooling Misbalance on the Phase Shift of Propagating Slow Waves in Non-adiabatic Solar Coronal Loops (Abhinav Prasad)

ESPOS
  • Date: Dec 2, 2021
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Abhinav Prasad
  • Indian Institute of Technology (BHU), India
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Shahin Jafarzadeh
Invoking the effects of thermal conductivity, compressive, viscosity, radiative losses, and heating-cooling misbalance, we derive the new general dispersion relation for the propagating slow MHD waves ... [more]

ESPOS Seminar: Formation and disappearance of a penumbra: Recent results (Mariarita Murabito)

ESPOS
  • Date: Feb 3, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Mariarita Murabito
  • National Institute for Astrophysics, Rome (INAF-OAR), Italy
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Shahin Jafarzadeh
The physical conditions resulting in the formation and disappearance of penumbral regions are poorly understood. We investigated these conditions by using high-resolution spectropolarimetric ... [more]

ESPOS Seminar: On the Differences in the Periodic Behavior of Magnetic Helicity Flux in Flaring Active Regions (Szabolcs Soós)

ESPOS
  • Date: Mar 3, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Szabolcs Soós
  • Eötvös Loránd University (ELTE), Hungary
  • Location: Eötvös Loránd University (ELTE), Hungary
  • Room: Zoom
  • Host: Shahin Jafarzadeh
Observational precursors of large solar flares provide a basis for future operational systems for forecasting. We studied the evolution of the normalized emergence (EM), shearing (SH), and total (T) ... [more]

ESPOS Seminar: Small-scale MHD waves in the solar chromosphere with ALMA (Juan Camilo Guevara Gómez)

ESPOS
  • Date: Mar 17, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Juan Camilo Guevara Gómez
  • Rosseland Centre for Solar Physics, University of Oslo, Norway
  • Location: Max-Planck-Institut für Sonnensystemforschung
  • Room: Zoom
  • Host: Shahin Jafarzadeh
[more]

Validation of a wave heated 3D MHD coronal-wind model using Polarized Brightness and EUV observations

ESPOS
  • Date: Mar 31, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Susanna Parenti
  • Room: Zoom
  • Host: Shahin Jafarzadeh
[more]

ESPOS Seminar: MHD wave propagation asymmetric solar waveguides (Noémi Kinga Zsámberger)

ESPOS
  • Date: Apr 28, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
The analytical and numerical modelling of the behaviour of magnetohydrodynamic (MHD) waves in various magnetic geometries is a constantly evolving, active area of research within the field of solar ... [more]

ESPOS Seminar: Collisional ionisation and recombination effects on coalescence instability in chromospheric partially ionised plasmas (Giulia Murtas)

ESPOS
  • Date: May 12, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Giulia Murtas (University of Exeter, United Kingdom)
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Plasmoid-mediated fast magnetic reconnection plays a fundamental role in driving explosive dynamics and heating in the solar atmosphere, but relatively little is known about how it develops in ... [more]

ESPOS Seminar: Coronal modelling: the good, the bad and the ugly (Michaela Brchnelova)

ESPOS
  • Date: Oct 20, 2022
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Michaela Brchnelova (KU Leuven, Belgium)
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
[more]

ESPOS - European Solar Physics Online Seminar: Small EUV brightenings detected by HRI-EUV on board Solar Orbiter: estimation of their termperature with SDO/AIA, Solar Orbiter/SPICE and Hinode/EIS

ESPOS
  • Date: Nov 30, 2023
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Antoine Dolliou
  • Institut d´Astrophysique Spatiale (IAS), France
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
The solar corona temperature is maintained to more than 1 MK. One of the main theories of the coronal formation (Parker 1988) suggests that the energy is dissipated into the corona through a high ... [more]

ESPOS - DKIST's view of quiet photospheric magnetism and application of neural networks to the characterisation of Stokes profiles (R. Campbell)

ESPOS
  • Date: Mar 7, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Ryan Campbell
  • Queen's University Belfast, United Kingdom
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
A new era of solar physics commences with observations of the quiet Sun using the 4-metre Daniel K. Inouye Solar Telescope/Visible Spectropolarimeter (DKIST/ViSP). We present full-Stokes observations ... [more]

ESPOS -Data-driven mode l of temporal evolution of the solar Mg II h and k profiles over the solar cycle (J. Koza)

ESPOS
  • Date: Mar 21, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Julius Koza
  • Astronomical Institute, Slovak Academy of Sciences, Slovakia
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
The solar radiation in the cores of the Mg II h & k spectral lines strongly correlates with solar magnetic activity and global variations of magnetic fields with the solar cycle. This work provides a ... [more]

ESPOS - Deciphering solar coronal heating: Energizing small-scale loops through surface convection (D. Nóbrega-Siverio)

ESPOS
  • Date: Apr 4, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Daniel Nóbrega-Siverio
  • Instituto de Astrofísica de Canarias (IAC), Spain
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
The solar atmosphere is filled with clusters of hot small-scale loops commonly known as Coronal Bright Points (CBPs). These ubiquitous structures stand out in the Sun by their strong X-ray and/or ... [more]

ESPOS - Thoughts on measuring elemental abundances in the solar atmosphere (G. Del Zanna)

ESPOS
  • Date: Apr 18, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Giulio Del Zanna
  • University of Cambridge, UK
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
I briefly review some methods and measurements of elemental abundances in the solar atmosphere, with emphasis on the transition region and corona. Some limitations in the methods, in the modeling of ... [more]

ESPOS - An overview of last October's SST-SolO observational campaign (S. Danilovic)

ESPOS
  • Date: May 2, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Sanja Danilovic
  • Institute for Solar Physics, Stockholm University, Sweden
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
We present the results of coordinated observations of the Swedish 1-m Solar Telescope with Solar Orbiter that took place from October 12th to 26th 2023. The campaign resulted in 7 datasets of various ... [more]

ESPOS - Detection and in-depth analyses of quiet-Sun IRIS Bright Points (Llŷr Dafydd Humphries)

ESPOS
  • Date: May 30, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Llŷr Dafydd Humphries
  • Aberystwyth University, United Kingdom
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Observations of small-scale brightenings in the low solar atmosphere can provide valuable constraints on possible heating and heat transport mechanisms. We present a method for the detection and ... [more]

ESPOS -Automatic Identification and Tracking of Sunspots (Charlotte Proverbs)

ESPOS
  • Date: Jun 13, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Charlotte Proverbs
  • University of Central Lancashire, United Kingdom
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
It is well understood that the dynamics of sunspots lead to energy being transferred to the solar atmosphere and stored in the coronal magnetic field. This provides a surplus of energy that may be ... [more]

ESPOS - Modeling of non-radially propagating halo CMEs and forecasting their arrival time at Earth(Angelos Valentino)

ESPOS
  • Date: Jun 27, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Charlotte Proverbs
  • Centre for Mathematical Plasma Astrophysics, KU Leuven, Belgium
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
The prediction of geomagnetic storms is becoming more and more important, with the aim to take effective measures for avoiding the possible damage from the extreme events. One of the important ... [more]

ESPOS -Quantifying when and where strong magnetic skew forms in a data-driven global model of the solar corona when limited observational data exist (J. Reid)

ESPOS
  • Date: Sep 5, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Jack Reid
  • University of St. Andrews, United Kingdom
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Strong magnetic skew characterizes several non-potential structures in the solar corona, including filaments, which can erupt, bringing about major geomagnetic effects. Skew is thus an indicator of ... [more]

ESPOS: Ca II K brightness as a function of magnetic field strength and characteristics of the observations (M. Murabito)

ESPOS
  • Date: Sep 19, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Mariarita Murabito
  • INAF-OAR - Rome Astrophysical Observatory, Italy
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Solar observations have often served as benchmarks of stellar conditions. A particularly illustrative example of the above link is given by the observations in the Ca II K and H lines at 393.367 nm ... [more]

ESPOS: Transverse oscillations in coronal loops and photospheric driving: combining high-resolution coronal and photospheric diagnostics together (N. Poirier)

ESPOS
  • Date: Oct 3, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Nicolas Poirier
  • Rosseland Centre for Solar Physics, University of Oslo, Norway
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Sustained kink oscillations in coronal loops have long been observed in TRACE, SDO/AIA, and more recently in SolO/EUI images. Although their properties are quite well-known now, their driver and ... [more]

ESPOS: Spectral analysis of solar filaments using Convolutional-Neural Networks (CNNs) (G. Castelló i Barceló)

ESPOS
  • Date: Oct 17, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Guillem Castelló i Baceló
  • University of the Balearic Islands - UIB, Spain
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Solar filaments (also called prominences when seen off-disk) are solar atmospheric structures consisting of dense, cool plasma clouds floating within the sun's corona. Since the beginning of solar ... [more]

ESPOS: Solar spectropolarimetric inversions applying Deep Learning techniques (Juan Esteban Agudelo)

ESPOS
  • Date: Oct 31, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Juan Esteban Agudelo
  • Observatorio Astronómico Nacional de Colombia, Universidad Nacional de Colombia, Colombia
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Recent advancements in spectropolarimetric instrumentation, such as the new facilities at the GREGOR and DKIST telescopes, have generated vast amounts of data with each observation. This increase in ... [more]

ESPOS: First joint NuSTAR and Solar Orbiter/STIX X-ray observations of solar microflares

ESPOS
  • Date: Nov 14, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Natalia Bajnokova
  • School of Physics & Astronomy, University of Glasgow, United Kingdom
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Small solar flares, or microflares (GOES B class and fainter), are frequent bursts of energy released in the Sun’s atmosphere, exhibiting heating and particle acceleration similar to that of large ... [more]

ESPOS: Turbulence and reconnection: exploring the role of kinetic fluctuations on the formation of plasmoids in a current sheet and how to include small-scale phenomena on large-scale systems (Jeffersson Agudelo Rued)

ESPOS
  • Date: Nov 14, 2024
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Jeffersson Agudelo Rueda
  • Northumbria University, UK
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Magnetic reconnection and turbulence are two phenomena that are often invoked to address outstanding open questions as the energy dissipation problem and the heating and acceleration of the solar ... [more]

ESPOS: Sun-as-a-star flare observations with HARPS-N and SST (Alex Pietrow)

ESPOS
  • Date: Jan 30, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Alex Pietrow
  • Leibniz Institute for Astrophysics Potsdam - AIP, Germany
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Stellar flares cannot be spatially resolved, which means that we have to extract complex three-dimensional behavior from a one-dimensional disk-integrated spectrum. Due to their proximity to Earth ... [more]

ESPOS: Three dimensional magnetic reconnection: Theory and observations (Jaroslav Dudík)

ESPOS
  • Date: Feb 13, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Jaroslav Dudík
  • Astronomical Institute of the Czech Academy of Sciences, Czech Republic
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
In the recent decades, three-dimensional modelling of solar flares and eruptions has made a number of predictions that were subsequently indicated by high-resolution imaging observations. These ... [more]

ESPOS: How BRADPIT could help us in flare forecasting through small AR activity monitoring (Augustin André-Hoffmann)

ESPOS
  • Date: Feb 27, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Augustin André-Hoffmann
  • The Solar Physics and Space Plasma Research Centre, University of Sheffield, UK
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
The Sun is a dynamic star, displaying activities ranging from subtle, short-lived events to major coronal mass ejections (CMEs) and powerful flares. Differentiating between “flaring” and ... [more]

ESPOS: Two Distinct Eruptive Events Observed by Metis on October 28, 2021 (Yara de Leo)

ESPOS
  • Date: Mar 13, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Yara De Leo
  • INAF – Catania Astrophysical Observatory, Italy
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
On October 28, 2021 the first X-class solar flare of Solar Cycle 25 occurred in active region NOAA AR 12887 with a peak at 15:35 UT. It produced the rare event of ground-level enhancement of the solar ... [more]

ESPOS: Two Distinct Eruptive Events Observed by Metis on October 28, 2021 (Yara de Leo)

ESPOS
  • Date: Mar 13, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Fallon Konow
  • INAF – Catania Astrophysical Observatory, Italy
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
On October 28, 2021 the first X-class solar flare of Solar Cycle 25 occurred in active region NOAA AR 12887 with a peak at 15:35 UT. It produced the rare event of ground-level enhancement of the solar ... [more]

ESPOS: First flare observations from SUIT (Soumya Roy)

ESPOS
  • Date: Mar 27, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Soumya Roy
  • Inter-University Centre for Astronomy and Astrophysics (IUCAA), India
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Solar Ultraviolet Imaging Telescope (SUIT) is the near Ultraviolet imager (200-400 nm) on board the Indian Solar mission Aditya-L1. It was launched on September 2nd, 2023 and was inserted in a halo ... [more]

ESPOS: GATES: A New Network for Synoptic Space Weather Observation (Fallon Konow)

ESPOS
  • Date: Apr 10, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Fallon Konow
  • Department of Physics, University of Rome Tor Vergata, Italy; and Department of Physics and Astronomy, Georgia State University, USA
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
We present a new network for space weather observation: Global Automatic Telescopes Exploring the SUN (GATES). GATES currently utilizes two primary instruments: the Mojave Solar Observatory (MSO) ... [more]

ESPOS: Spectral resolution effects on the information content in solar spectra (Ivan Milic)

ESPOS
  • Date: Apr 24, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Ivan Milic
  • Institute for Solar Physics (KIS), Germany
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Spectral resolution and sampling present a design trade-off when building spectropolarimetric instruments to observe the Sun with very high spatial resolution. On the one hand, for ... [more]

ESPOS: Solar EUV irradiances, their variations with the solar cycle and a new model (Evangelia Deliporanidou)

ESPOS
  • Date: May 8, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Evangelia Deliporanidou
  • DAMTP, University of Cambridge, UK
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Measuring the long-term variability of solar EUV/UV irradiances is needed for e.g. studying the Sun’s influence on space weather, satellite drag and for solar studies. However, direct measurements ... [more]

ESPOS: Decayless kink oscillations of solar coronal loops as a self-oscillatory process (Valery M Nakariakov)

ESPOS
  • Date: May 22, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Valery M Nakariakov
  • University of Warwick, United Kingdom
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Kink oscillations of the decayless class are detected as small amplitude (< 1 Mm) persistent transverse repetitive displacements of solar coronal plasma loops, occurring without any association with ... [more]

ESPOS: Chromospheric Fibrils in Pores and Mossy Active Region Plage Observed by DKIST, IRIS, and Solar Orbiter (Yingjie Zhu)

ESPOS
  • Date: Jun 5, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Yingjie Zhu
  • Physikalisch-Meteorologische Observatorium Davos/World Radiation Center (PMOD/WRC), Switzerland
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
Spatial and temporal correlations of chromospheric fibrils and jets with the active region moss emission have been extensively studied since the beginning of this millennium, suggesting a coupling ... [more]

ESPOS: Wind Predict: Modeling the solar corona and its EUV emission (Barbara Perri)

ESPOS
  • Date: Jun 19, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Barbara Perri
  • IAS & CEA/AIM,Université Paris-Saclay, France
  • Room: https://zoom.us/j/165498165
  • Host: Shahin Jafarzadeh
With the increase of space EUV observations (SoHO, SDO, Solar Orbiter and soon the Vigil mission), this diagnostic has become an essential tool to bridge the gap between models and our current ... [more]

ESPOS: Advancing Solar Magnetic Field Modeling (Carlos António)

ESPOS
  • Date: Oct 2, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Carlos António
  • Instituto de Astrofísica e Ciências do Espaço, Universidade de Coimbra, Portugal
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Energetic events such as solar flares and coronal mass ejections (CMEs), which can lead to solar storms, are driven by the coronal magnetic field (CMF), whose structure and evolution remain not fully ... [more]

ESPOS: Localising and Mapping the Most Eruptive Regions on the Sun (Marianna Korsos)

ESPOS
  • Date: Oct 16, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Marianna Korsos
  • University of Sheffield, SP2RC - SSL, UK
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Active regions with increasing magnetic complexity are more likely to trigger major solar eruptions. During a single solar cycle, approximately 1000 active regions emerge on the Sun. Among these ... [more]

ESPOS: Sunrise III Flight and Early Science Highlights (Smitha Narayanamurthy)

ESPOS
  • Date: Oct 30, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Smitha Narayanamurthy
  • MPS
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
In July 2024, Sunrise III flew from Sweden to Canada at stratospheric heights capturing high resolution diffraction-limited images of the Sun for 6.5 days. The telescope carried three scientific ... [more]

ESPOS: Earth’s Ionospheric Response to the Impulsive and Late Phases of Solar Flares (Susanna Bekker)

ESPOS
  • Date: Nov 27, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Susanna Bekker
  • Queen’s University Belfast, Astrophysics Research Centre, UK
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
During a solar flare, fluxes in various lines and continua of the solar spectrum increase, causing enhanced ionisation in the illuminated part of the Earth’s ionosphere and an increase in the total ... [more]

ESPOS: Wave Period Variability in a Quiescent Solar Prominence (Aneta Wiśniewska)

ESPOS
  • Date: Dec 11, 2025
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Aneta Wiśniewska
  • Astronomical Institute of Slovak Academy of Sciences, SK
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
On 26 September 2022, we observed a quiescent solar prominence with Hα imaging spectroscopy using the Solar Dynamics Doppler Imager (SDDI) on the SMART telescope. Unlike earlier works that detected ... [more]

ESPOS: Understanding the Physics of Small-Scale Hot Coronal Loops (Eva Sola Viladesau)

ESPOS
  • Date: Jan 15, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Eva Salo Viladesau
  • Instituto de Astrofísica de Canarias, Universidad de La Laguna, ES
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Coronal bright points are ubiquitous, highly energetic events that are often seen accompanying other dynamic and eruptive phenomena in the solar atmosphere. Their large energy output, their ... [more]

ESPOS: Optimising the Use of the European Solar Telescope before MCAO: the Multi-Aperture Option (Göran Scharmer)

ESPOS
  • Date: Jan 29, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Göran Scharmer
  • Stockholm University
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
We discuss how to optimise the science output of the European Solar Telescope (EST), when used without the wide-field compensation for high-altitude seeing that the EST multi conjugate adaptive optics ... [more]

ESPOS: Can we anticipate solar flares? Statistical analysis of the Flare Anticipation Index (FAI) (Paula González-Prieto)

ESPOS
  • Date: Feb 12, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Paula González-Prieto
  • Observatorio Astronómico Nacional de Colombia, Universidad Nacional de Colombia, COL
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Solar flares are the most energetic manifestations of solar activity and can significantly affect Earth’s magnetosphere, ionosphere, and technological systems. Therefore, anticipating these events ... [more]

ESPOS: Linking Magnetic Field Diagnostics with 3D Coronal Mass Ejection Speeds in Solar Active Regions (Harshita Gandhi)

ESPOS
  • Date: Feb 26, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Harshita Gandhi
  • Aberystwyth University, Solar System Physics group, UK
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Understanding how magnetic properties of solar active regions influence coronal mass ejection (CME) dynamics is essential for constraining eruption models and improving space-weather prediction. In ... [more]

ESPOS: Exploring small-scale coronal loop structures using ultra high resolution observations from the latest Hi-C sounding rocket campaign (Anna Rankin)

ESPOS
  • Date: Mar 12, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Anna Rankin
  • University of Lancashire, UK
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
This work takes advantage of new observational data collected by the High-resolution Coronal Imager (Hi-C) at the highest spatial and temporal resolutions available. This most recent Hi-C dataset is ... [more]

ESPOS: Comparing Solar Structure Detection Methods in SDO/AIA Observations for Onboard Spacecraft Deployment (Panagiotis Gonidaki)

ESPOS
  • Date: Mar 26, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Panagiotis Gonidakis
  • Centre for mathematical Plasma Astrophysics, KU Leuven, BE
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Recent advances in solar physics increasingly rely on automated identification of coronal structures using machine learning. Yet most studies emphasise scientific performance without evaluating ... [more]

ESPOS: Flare Ribbons and the Reconnection (Flux) Rate (Sushree Sangeeta Nayak)

ESPOS
  • Date: Apr 23, 2026
  • Time: 11:00 AM c.t. - 12:00 PM (Local Time Germany)
  • Speaker: Sushree Sangeeta Nayak
  • University of the Balearic Islands, ES
  • Room: https://uio.zoom.us/j/63138938090
  • Host: Valeriia Liakh
Flare ribbons are a quintessential part of a flare. They are extensively used to understand the overlying reconnection mechanism and overall flaring process. Further, the reconnection rate is a key ... [more]
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