Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasp..113..263l&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 113, Issue 781, pp. 263-266.
Astronomy and Astrophysics
Astronomy
6
Stars: Early-Type, Stars: Mass Loss, Stars: Winds, Outflows, Stars: Emission-Line, Be, Stars: Wolf-Rayet
Scientific paper
The rise of ultraviolet astronomy in the seventies and eighties of the last century has taught us that all hot luminous stars are blowing fierce winds into space with velocities of several thousand km s-1 and mass-loss rates of 10-6 to 10-4 Msolar yr-1. The mass-loss rates of the normal O, B, and A stars are well explained by radiation pressure due to spectral lines, including the observed bi-stability jumps near spectral types B1 and A0. However, several important observed wind features are not well understood: the presence of corotating spiral-like structures in the wind, the high densities of flat outflowing equatorial disks, and the high mass-loss rates of the Wolf-Rayet stars. I discuss the discovery and early ideas about winds from hot stars and the triumphs and failures of the radiation-driven wind theory. This Essay is one of a series of invited contributions appearing in the PASP throughout the years 2000 and 2001 to mark the new millennium. (Eds.)
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