Seminars at MPS

Interested visitors are very welcome to join in all seminars held and talks given at the MPS. The presentations are mainly given in English. More detailed information can be found at the seminars' pages. Invited guest scientists of other institutes report on the successes and results of their research in institute seminars and colloquia. PhD students of the International Max Planck Research School (IMPRS) present their work in S3 seminars. In the Seminars about Planets and Comets, as well as in the Seminars about the Sun and sunlike Stars, the scientists of the respective departments report on the latest results and progress made in their projects and introduce new missions. All seminars are concluded with a short discussion or a questions-and-answers sessions.

MPS Seminar: The Mercuri(o)us Planet (Daniel Heyner)

Date: May 7, 2025
Time: 11:00 AM - 12:00 PM (Local Time Germany)
Speaker: Daniel Heyner
TU Braunschweig
Location: Max-Plack-Institut für Sonnensystemforschung
Room: Auditorium
Host: Johannes Wicht

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S3 Seminar: Chromospheric Fe I lines in the near-ultraviolet solar spectrum: Simulations vs observations (Edvarda Harnes)

Date: May 7, 2025
Time: 02:00 PM - 02:30 PM (Local Time Germany)
Speaker: Edvarda Harnes
IMPRS
Location: Max-Plack-Institut für Sonnensystemforschung
Room: Hörsaal
Host: Sonja Schuh

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S3 Seminar: Probing the solar convection zone with inertial modes (Prithwitosh Dey)

Date: May 7, 2025
Time: 02:30 PM - 03:00 PM (Local Time Germany)
Speaker: Prithwitosh Dey
IMPRS
Location: Max-Plack-Institut für Sonnensystemforschung
Room: Hörsaal
Host: Sonja Schuh

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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 remain limited, making predictive modelling crucial. We have found linear correlations between EUV daily spectral irradiances obtained from SOHO/CDS and SDO/EVE and solar proxies of activity, such as the F10.7, F30 cm radio fluxes and the Mg II index over several solar cycles, analysing data from 1998 until 2024. We confirm previous findings in that the F30 and the Mg II indexes are better, and that the variations increase with the formation temperature of the lines; the transition region lines show very little variations, except the hydrogen and helium lines. A code to predict the EUV irradiances of the main lines is provided. Relatively good agreement between the CDS and EVE irradiances is found, but significant differences with historical measurements are found in some EVE lines, especially at the longer wavelengths. Using the atomic data we made available in CHIANTI v.11 and the correlations with the proxies, we are building a new model to predict the lines and continua in the whole EUV spectral range covered by SDO/EVE. [more]