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A spectroscopic search for colliding stellar winds in O-type close binary systems. III - 29 UW Canis MajorisThe orbital-phase variations in the optical emission lines and UV P Cygni lines of the massive O-type binary 29 UW Canis Majoris are investigated in a search for evidence of colliding winds. High SNR spectra of the H-alpha and He I 6678-A emission lines are presented, and radial velocity curves for several features associated with the photosphere of the more luminous primary star are given. The H-alpha features consists of a P Cygni component that shares the motion of the primary, and which probably originates at the base of its wind, and a broad, stationary emission component. It is proposed that the broad emission forms in a plane midway between the stars where the winds collide. A simple geometric model is used to show that this placement of the broad component can explain the lack of orbital velocity shifts, the near-constancy of the emission strength throughout the orbit, the large velocities associated with the H-alpha wings, and the constancy of the velocity range observed.
Document ID
19930050723
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Wiggs, Michael S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gies, Douglas R.
(Georgia State Univ. Atlanta, United States)
Date Acquired
August 16, 2013
Publication Date
April 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 407
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A34720
Funding Number(s)
CONTRACT_GRANT: NAG5-1218
Distribution Limits
Public
Copyright
Other

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