Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313l..25m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 313, Feb. 1, 1987, p. L25-L29. NSERC-supported rese
Astronomy and Astrophysics
Astrophysics
19
Binary Stars, Stellar Oscillations, Wolf-Rayet Stars, Stellar Models, Stellar Spectra, Stellar Structure, Velocity Distribution
Scientific paper
Vreux (1985) has recently argued that there are indications of nonradial pulsation in the velocity variations of at least some Wolf-Rayet (W-R) stars. His case hinges on the claim that the periods of suspected W-R close binary systems do not comprise a random distribution, and on the detections, reported by Vreux and colleagues in 1985, of variations with periods near 0.45 day in two W-R stars. It is demonstrated that the W-R periods are consistent with a random distribution, and that the claim of near-identical short periods for the two stars is not very secure. It is concluded that no evidence is currently available to specifically support the nonradial hypothesis for the variability of W-R stars. A simple physical argument is presented which suggests that periods of one-half day or less may not even be detectable in W-R winds using the velocity shifts of optical emission lines.
Beech Martin
Matthews Jaymie M.
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