APSIDAL MOTION OF RINGS IN BINARY SYSTEMS

The rates of change of semimajor axis, eccentricity, and orientation have been computed for a variety of elliptic rings in binary systems. The rings were allowed to surround either one or both stars. Thin-ring and thick-disk configurations were found with rates of apsidal rotation appropriate to the...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1977-12, Vol.89 (532), p.862-873
Main Author: CASTLE, K. G.
Format: Article
Language:English
Subjects:
B stars
Be stars
Binary systems
Numerical eccentricity
Periastron
Radial velocity
Rates of change
Semimajor axis
Stars
Stellar masses
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Summary:The rates of change of semimajor axis, eccentricity, and orientation have been computed for a variety of elliptic rings in binary systems. The rings were allowed to surround either one or both stars. Thin-ring and thick-disk configurations were found with rates of apsidal rotation appropriate to the rate of change of the relative strengths of the wings of the Balmer lines (V/R) in Be stars. These disks can produce a radial-velocityexcitation gradient for the shell lines of either sign. A very narrow range of thin rings was found with rates of apsidal rotation which may be appropriate for the distortion wave in RS CVn systems.
ISSN:0004-6280
1538-3873
DOI:10.1086/130239