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A search for spectroscopic binaries among the runaway O type starsNumerous radial velocity measurements of medium dispersion were made for the 10 brighter stars given in Stone's list of very probable O type runaways. All plates were measured with the KPNO PDS microdensitometer, and a new iterative reductional analysis was used to derive plate velocities, which are estimated to be 1.6 times more accurate internally than those found by using the traditional method. Of thse stars, psi Per, alpha Cam, HD 188209, and 26 Cep are identified as probable velocity variables, while 9 Sge, lambda Cep, and HD 218915 are classed as possible variables. If the source of this variability is Keplerian rather than atmospheric, which cannot be established unequivocally from the observations of this paper, psi Per could be a spectroscopic binary with a black hole companion, and at least 1.2 solar mass. The detection of runaway binary systems from radial velocity measurements is discussed.
Document ID
19820062538
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Stone, R. C.
(Dearborn Observatory Evanston, IL, United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1982
Publication Information
Publication: Astrophysical Journal
Subject Category
Astronomy
Accession Number
82A46073
Distribution Limits
Public
Copyright
Other

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