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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

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

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

During the IAUS340 in Jaipur (India) Mariangela Viviani was rewarded with the "Best Poster Award" in her session "VII: Solar Stellar Dynamo". more

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

We make use of a solar-like convective dynamo simulation of Käpylä et al. 2016, exhibiting equatorward propagation of the magnetic field, multiple frequencies, and irregular variability, including a missed cycle and complex parity transitions between dipolar and quadrupolar modes, to study the physical causes of such events. We use the test field analysis tool to measure and quantify the effects of turbulence in the generation and evolution of the large-scale magnetic field...  more

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

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