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Asteroseismic signatures of magnetic activity variations in solar-type stars

Published online by Cambridge University Press:  18 February 2014

Travis S. Metcalfe
Travis S. Metcalfe*
Affiliation:
Space Science Institute, Boulder CO 80301USA; email: travis@spsci.org Stellar Astrophysics Centre, Aarhus University, DK-8000 Aarhus C, Denmark
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Abstract

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Observations of magnetic activity cycles in other stars provide a broader context for our understanding of the 11-year sunspot cycle. The discovery of short activity cycles in a few stars, and the recognition of analogous variability in the Sun, suggest that there may be two distinct dynamos operating in different regions of the interior. Consequently, there is a natural link between studies of magnetic activity and asteroseismology, which can characterize some of the internal properties that are relevant to dynamos. I provide a brief historical overview of the connection between these two fields (including prescient work by Wojtek Dziembowski in 2007), and I highlight some exciting results that are beginning to emerge from the Kepler mission.

Keywords

stars: activitystars: interiorsstars: magnetic fieldsstars: oscillations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 213 - 216
Copyright
Copyright © International Astronomical Union 2014 

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