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Extreme-mass-ratio solar-type binaries and their implications for cluster environs

Published online by Cambridge University Press:  18 January 2010

R. G. Samec ,
Christa M. Labadorf ,
E. R. Figg ,
Trevor S. Loflin ,
Gregory R. Behn ,
Nathan A. Hawkins ,
Heather A. Chamberlain ,
D. R. Faulkner  and
W. Van Hamme
R. G. Samec
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
Christa M. Labadorf
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
E. R. Figg
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
Trevor S. Loflin
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
Gregory R. Behn
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
Nathan A. Hawkins
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
Heather A. Chamberlain
Affiliation:
Astronomy Group, Physics and Engineering Department, Bob Jones University, 1700 Wade Hampton Boulevard, Greenville, SC 29614, USA
D. R. Faulkner
Affiliation:
University of South Carolina, Lancaster, 476 Hubbard Dr., Lancaster, SC 29720, USA
W. Van Hamme
Affiliation:
Physics Department, Florida International University, 11200 SW 8th St., Miami, FL 33199, USA
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Abstract

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During the past decade, the number known shallow-amplitude, yet totally eclipsing, extreme-mass-ratio binaries has increased from one (AW UMa, which is now in doubt) to about a dozen. Statistics are accumulating that will tell us the nature of these once rare systems. These individual interacting field binaries are believed to be the progenitors of FK Comae-type fast-rotating subgiants, which are similar to the cluster stars called ‘variable blue stragglers.’ We review our recent observations and new analyses of the individual systems, V409 Hya, GSC 1283 0053 Ori, GSC 2537 520 CVn, using the 2007 Wilson Code and summarize results from our previous observations (V802 Aql, V902 Sgr) and those from the literature (e.g., CK Boo, GR Vir, HV Aqr, UY UMa, EM Pis, CU Tau, TV Mus) to disclose a preliminary picture of the character of this interesting class of binary stars.

Keywords

magnetic fieldsbinaries: eclipsingblue stragglers
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S266: Star clusters: basic galactic building blocks throughout time and space , August 2009 , pp. 523
Copyright
Copyright © International Astronomical Union 2010