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FK Comae and the Evolution of Close Binaries

Published online by Cambridge University Press:  07 August 2017

David P. Huenemoerder ,
Lawrence W. Ramsey ,
Derek L. Buzasi  and
Harold L. Nations
David P. Huenemoerder
Affiliation:
Jet Propulsion Laboratory
Lawrence W. Ramsey
Affiliation:
Pennsylvania State University
Derek L. Buzasi
Affiliation:
Johns Hopkins University
Harold L. Nations
Affiliation:
Franklin and Marshall University

Abstract

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FK Com is an enigma among active cool stars. A rotationally driven magnetic dynamo is an explanation for activity. Youth and binarity are two causes of rapid rotation, but FK Com is old, single, and rotating near breakup. Much studied optical and ultraviolet data have not revealed the cause of its unusual activity. It is an important object in a more complete understanding of close binary star evolution and of the dynamo theory of magnetic activity. In 1989, we executed a coordinated ultraviolet and intensive optical spectroscopic and photometric campaign to better elucidate its characteristics. Data relevant to its evolutionary status, namely its radial velocity variations, will be discussed here, while an in depth study of the chromospheric activity will be deferred to a more detailed publication.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 403 - 406
Copyright
Copyright © Kluwer 1992 

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