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Rossby Number or Rotation Period?

Published online by Cambridge University Press:  19 July 2016

K. Stȩpień
K. Stȩpień*
Affiliation:
Astrophysical Institute Potsdam, An der Sternwarte 16 D-O-1561 Potsdam Warsaw University Observatory, Al. Ujazdowskie 4 00-478 Warszawa

Abstract

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It is shown that the scaling of rotation periods by a color-dependent parameter (turnover time) improves substantially the observed activity-period relations only for single, main sequence, solar type stars with 0.5 ≲ B – V ≲ 0.8. For other single main sequence stars and for single giants activity indices correlate equally well with rotation period and the Rossby number, or show no correlation with either parameter.

Keywords

stellar activitystellar rotation
Type
4. Late-Type and Other Stars
Information
Symposium - International Astronomical Union , Volume 157: The Cosmic Dynamo , 1993 , pp. 141 - 145
Copyright
Copyright © Kluwer 1993 

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