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Energy Losses by Stellar Activity Phenomena

Published online by Cambridge University Press:  12 April 2016

Maria Katsova
Maria Katsova*
Affiliation:
Sternberg State Astronomical Institute, Moscow University, 119899 Moscow V-234Russia

Abstract

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For active late-type dwarfs, the total energy losses including both chromospheric and coronal radiation as well as the energy losses caused by stellar flares reach 3·10−3 L001. To maintain such high energetic losses requires a high efficiency of the dynamo action in the convection zone. Mass loss by active late-type stars can probably approach the rate of 10−11 M⊙/yr if we take into account the large-scale structure of their coronae and transient events. The phase of activity can continue for up to 1% of the lifetime of these stars on the main sequence due to braking by such a stellar wind.

Type
VII. Activity, a break of spherical symmetry
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 654 - 656
Copyright
Copyright © Astronomical Society of the Pacific 1993

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