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SUMMARY:Contributed talk: 3D models of stellar magnetism: cyclic and non-c
 yclic dynamos - Antoine Strugarek (CEA/Saclay)
DTSTART:20221130T111500Z
DTEND:20221130T114500Z
UID:TALK192119@talks.cam.ac.uk
DESCRIPTION:The magnetic field of our Sun is generated through an internal
  dynamo process leading to a cyclic variability of about 11 years. This cy
 clic field shapes the environment of our star and determines the connectiv
 ity in the heliosphere from the photosphere to the Earth orbit and beyond.
  The Sun has probably not always possessed such a cyclic field\, nor shoul
 d it keep it as it ages. Indeed\, stars like the Sun spin down as they age
 \, which greatly influences the dynamo processes they are able to sustain.
 \n&nbsp\;\nI will present ongoing efforts to model stellar dynamos in an e
 volutionary context. Based on numerical studies\, we have recently propose
 d a unified view of the types of cycles solar-like stars are able to susta
 in. These results are confirmed using both simplified\, mean field approac
 h as well as 3D turbulent numerical simulations using various approximatio
 ns. They show a tight link between the large-scale rotation profile within
  solar-like star\, and the type of cyclical dynamos they are able to susta
 in. In this context I will detail the expected energy budget of such stars
 \, and its implication for stellar dynamos.\n&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
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