Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219...11s&link_type=abstract
Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held
Astronomy and Astrophysics
Astronomy
5
Scientific paper
The study of stellar activity is now an almost classical astronomical topic because the first observations were made almost hundred years ago and many thousands of papers were published in the meantime. However the complexity of the atmospheric and interior structure as observed on the Sun is hard if not impossible to extrapolate to solar-type stars. Yet there is just a single main ingredient that acts as the driving mechanism for activity in all atmospheric layers and the convective envelope: the dynamo-driven magnetic field. In my talk I will try to give examples where the solar analogy holds and where ist is clearly not appropriate. I stress the importance of mapping stellar surfaces as fingerprints of the underlying dynamo action.
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