Asteroseismic signatures of magnetic activity variations in solar-type stars
Abstract
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.
- Publication:
-
Precision Asteroseismology
- Pub Date:
- February 2014
- DOI:
- 10.1017/S1743921313014348
- arXiv:
- arXiv:1309.2207
- Bibcode:
- 2014IAUS..301..213M
- Keywords:
-
- stars: activity;
- stars: interiors;
- stars: magnetic fields;
- stars: oscillations;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 4 pages, 1 figure, proceedings of IAU Symposium 301: Precision Asteroseismology