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Astrolunch: Petri Kaepylae | The Racah Institute of Physics

Astrolunch: Petri Kaepylae

Date: 
Tue, 26/04/202212:30-13:30
Title: Magnetism of late-type stars in natura and in silico

Abstract:
The Sun exhibits magnetic activity in various spatial and temporal scales. For a dynamo theorist the arguably most interesting phenomena is the on the average 22-year magnetic cycle of the Sun. Observations accumulated over several decades show that other low mass stars like
the Sun also exhibit magnetic activity and cycles, with the level of magnetic activity being closely related to the age of the stars. I summarize the main findings from observations and how the Sun fits into this overall picture.

Theoretical modeling of stellar magnetism relies heavily on numerical modeling. However, the physical conditions in such models are also far removed from real stars and making contact with observations has to be made with care. Nevertheless, 3D MHD simulations of convection and
dynamos capture many characteristics of solar and stellar observations and they are the most promising way to understand the genesis of magnetism in stars. Recent simulation results of solar-like and fully convective stars are discussed, emphasizing the successes and outstanding challenges.
 
Zoom link :
https://huji.zoom.us/j/83072998638?pwd=S1U0NDcvbFZZVmx1VGQyUDRZU2NpUT09
Meeting ID: 830 7299 8638
Passcode: w31c0m3