Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-05-15
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures. Conference proceedings for the N+N+N Workshop, "From our star to far stars: Variation and Variability". Ac
Scientific paper
10.1002/asna.200710800
It is well known that magnetic activity in late-type stars increases with increasing rotation rate. Using inversion techniques akin to medical imaging, the rotationally broadened profiles from such stars can be used to reconstruct `Doppler images' of the distribution of cool, dark starspots on their stellar surfaces. Interacting binaries, however, contain some of the most rapidly rotating late-type stars known and thus provide important tests of stellar dynamo models. Furthermore, magnetic activity is thought to play a key role in their evolution, behaviour and accretion dynamics. Despite this, we know comparatively little about the magnetic activity and its influence on such binaries. In this review we summarise the concepts behind indirect imaging of these systems, and present movies of the starspot distributions on the cool stars in some interacting binaries. We conclude with a look at the future opportunities that such studies may provide.
Dhillon Vik S.
Shahbaz Tariq
Steeghs Daniel
Watson Christopher A.
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