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Spot activity cycles and flip‐flops on young solar analogs
Author(s) -
Berdyugina S. V.,
Järvinen S. P.
Publication year - 2005
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200410390
Subject(s) - sunspot , differential rotation , flops , physics , astrophysics , astronomy , starspot , stars , magnetic field , computer science , quantum mechanics , parallel computing
We discuss activity phenomena observed in the spot distribution on young single solar‐type stars LQ Hya, AB Dor and EK Dra. These include cyclic variations of the mean activity level, differential rotation, persistent active longitudes separated by 180° and flip‐flop cycles. A comparison with the sunspot activity reveals many similarities between the Sun and the young solar analogs. Our results confirm the presence of cyclic activity in very young dwarfs and allow for studying evolution of the stellar magnetic activity during the main‐sequence stage. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)