Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.221..105f&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 221, no. 1-2, p. 105-114
Astronomy and Astrophysics
Astronomy
O Stars, Photosphere, Stellar Physics, Stellar Winds, Ultraviolet Astronomy, Variable Stars, Wind Velocity, Resonance, Spectroscopy, Stellar Oscillations, Ultraviolet Spectra, Velocity Distribution
Scientific paper
The characteristics of the line profile variations observed in optical transitions of O-type stars are reviewed. For a few well-observed stars, there is compelling evidence that the variations are due to photospheric velocity fields from one or more modes of nonradial pulsation. However, the origin of the line profile variations observed in most O stars is not yet established. To date, there is little empirical evidence to suggest that the variability in optical absorption lines of O stars is causally linked to the stellar wind variability commonly observed in their UV resonance lines.
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