Wind variability in intermediate luminosity B supergiants

Details Wind variability in intermediate luminosity B supergiants Wind variability in intermediate luminosity B supergiants

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.221...77m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 221, no. 1-2, p. 77-85

Physics

1

B Stars, Giant Stars, Stellar Luminosity, Stellar Physics, Stellar Winds, Variability, Wind Velocity, Absorptivity, Gray Scale, Iue, Photosphere

Scientific paper

We discuss wind variability in intermediate luminosity B supergiants. Because these are not the hottest, most luminous or just about other kind of '-est' stars, they have not attracted much attention. However, since their wind lines are well-developed, but unsaturated, they make ideal diagnostics for time dependent wind studies. We show that their wind profiles undergo large scale variability and that this phenomenon is quite common. We also discuss a time series for the B0.5 Ib HD 64760 which suggests the long sought after connection between wind and photospheric activity. Newly developed analysis techniques needed to extract physical information from the wind lines are discussed, and results are applied to the time series.

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