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Cyclic fluctuations in the differential rotation of active stars

Published online by Cambridge University Press:  01 August 2006

Pascal Petit
Pascal Petit*
Affiliation:
Observatoire Midi-Pyrénées, 14 avenue Edouard Belin, F-31400 Toulouse, Franceemail: spetit@ast.obs-mip.fr
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Abstract

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Differential rotation is described in stellar dynamo models as one of the fundamental phenomena governing the amplification of magnetic fields in active stars.Using indirect imaging methods, the measurement of photospheric differential rotation is now achieved on a growing number of very active stars, a fraction of which exhibit temporal fluctuations of potentially large amplitude in their latitudinal shear, on a time-scale of a few years. I first describe the modeling tools on which such analysis is based, then discuss the implications of this observational work on our understanding of stellar dynamos and of the impact stellar magnetic fields may have on the dynamics of convective envelopes.

Keywords

Stars: magnetic fieldsstars: late-typestars: rotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 280 - 281
Copyright
Copyright © International Astronomical Union 2007

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