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Binary Stars in Praesepe

Published online by Cambridge University Press:  12 April 2016

Pavel Kroupa  and
Christopher A. Tout
Pavel Kroupa
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, England
Christopher A. Tout
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, England

Abstract

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In open clusters the scatter about the single-star main sequence is usually negligible. However, unresolved binary systems are brighter and redder than single stars, and thus some ‘stars’ appear shifted away from the main sequence. We make very simple models of the Praesepe cluster, and find evidence that low-mass systems prefer independent component masses, whereas systems of higher mass than the sun appear to favour some correlation towards equal-mass components.

Type
Theoretical Aspects
Information
International Astronomical Union Colloquium , Volume 135: Complementary Approaches to Double and Multiple Star Research , 1992 , pp. 231 - 233
Copyright
Copyright © Astronomical Society of the Pacific 1992

References

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