MSc/BSc projects

  • Combining global magnetoconvection and dynamo models - accounting for the full turbulent effects 
  • Cyclic dynamos from simulations - what is the mechanism driving the magnetic cycle?
  • Large- and small-scale dynamos and shear acting together - who kills who, and why? 
  • Deriving spot lifetimes of an active pole-on star

SOLSTAR news archive

SOLSTAR news archive

The most recent research news are collected to the SOLSTAR main page. Here you can find all our research higlights archived.

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Teaser 1545314581

ERC Consolidator Grant to Maarit Käpylä

December 20, 2018
MPS-scientist Maarit Käpylä receives a Consolidator Grant from the European Research Commission to conduct the project "Building up a Unified Theory of Stellar Dynamos (UniSDyn)". [more]
Teaser 1541704799

Estimating rotation periods and magnetic cycle lengths of active stars - PhD thesis by Nigul Olspert

November 08, 2018
Nigul Olspert, M.Sc., will defend the dissertation "From periodic to cyclic processes in stellar magnetic activity research: time series analysis methods and their applications" on Friday 16 November at 12 noon at the Aalto University School of Science, lecture hall AS1, Maarintie 8, Espoo.  [more]
Teaser 1558597931

Application of probabilistic methods to Mount Wilson Ca H&K data confirms robustness of the inactive branch

October 01, 2018
The existence of "activity branches", that is stellar cycles clustering in groups that show linear dependencies as function of rotation, has been debated for years. Such dependencies have crucial implications on how to explain stellar magnetism in terms of dynamo theory. In this study we applied novel time series analysis techniques to one of the longest stellar activity database. [more]
Teaser 1541337789

Best poster award for Mariangela Viviani

March 02, 2018
During the IAUS340 in Jaipur (India) Mariangela Viviani was rewarded with the "Best Poster Award" in her session "VII: Solar Stellar Dynamo". [more]
Original 1518447787

Turbulent transport coefficients measured from stellar convective dynamos

January 05, 2018
Turbulent effects play an important role in the magnetic generation of the Sun and stars. Unfortunately, at the moment observation are not able to reveal these effects. On way to understand how these turbulent effects can generate magnetic field via dynamo mechanisms is to study global 3 dimensional magnetohydrodynamic simulation of the Sun and stars...  [more]
Original 1518447779

Extended subadiabatic layer in simulations of overshooting convection

August 22, 2017
Using three-dimensional simulations with smoothly varying heat conduction profile we found solutions where a substantial fraction of the lower part of the convection zone is stably stratified according to the Schwarzschild criterion. If these results carry over to the Sun... [more]
Teaser 1558000191

GPUs made useful in turbulence modelling

August 01, 2017
 We have developed an effective method for accelerating fluid dynamics calculations with high-order precision on graphics processing units (GPUs). This is done by efficient use of GPU memory with cache blocking and by dividing computation algorithms into memory efficient chunks. Our Nvidia CUDA based, proof of concept code Astaroth is able to achieve 3.6 times speedup in comparison to the reference code, which in practice allows for a week-long turbulence simulation to be performed within a couple of days. The method is published in Pekkilä, Väisälä et al. (2017). [more]
 
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