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The Ejection of Runaway Massive Binaries

Published online by Cambridge University Press:  12 July 2007

M. Virginia McSwain ,
Scott M. Ransom ,
Tabetha S. Boyajian ,
Erika D. Grundstrom  and
Mallory S.E. Roberts
M. Virginia McSwain
Affiliation:
NSF Astronomy and Astrophysics Postdoctoral Fellow; Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101, USA, email: [email protected]
Scott M. Ransom
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA, email: [email protected]
Tabetha S. Boyajian
Affiliation:
Department of Physics and Astronomy, Georgia State University, P.O. Box 4106, Atlanta, GA 30302-4106, USA, email: [email protected], [email protected], [email protected]
Erika D. Grundstrom
Affiliation:
Department of Physics and Astronomy, Georgia State University, P.O. Box 4106, Atlanta, GA 30302-4106, USA, email: [email protected], [email protected], [email protected]
Mallory S.E. Roberts
Affiliation:
Eureka Scientific, Inc., 2452 Delmer Street Suite 100, Oakland, CA 94602-3017, USA, email: [email protected]
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Abstract

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The runaway O-type stars HD 14633 and HD 15137 are both SB1 systems that were probably ejected from the open cluster NGC 654. Were these stars dynamically ejected by close gravitational encounters in the dense cluster, or did the binaries each receive a kick from a supernova in one member? We present new results from our investigation of the optical, X-ray, and radio properties of these binary systems to discuss the probable ejection scenarios. We argue that these binaries may have been ejected via dynamical interactions in the dense cluster environment.

Keywords

binaries: spectroscopicstars: early-typestars: kinematicsstars: windsstars: individual (HD 14633, HD 15137)pulsars: generalX-rays: binaries
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 313 - 315
Copyright
Copyright © International Astronomical Union 2007

References

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