Observational aspects of wind variability

Details Observational aspects of wind variability Observational aspects of wind variability

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.221...41l&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 221, no. 1-2, p. 41-63

Astronomy and Astrophysics

Astronomy

9

Hot Stars, Stellar Physics, Stellar Spectra, Stellar Winds, Ultraviolet Astronomy, Ultraviolet Spectra, Variability, Binary Stars, Charge Coupled Devices, H Alpha Line, Iue, Spaceborne Astronomy, Spectrographs

Scientific paper

The observational methods to derive information about the instability and variability of winds of hot stars are discussed. The expected effects of blobs and shells in the winds on the P Cygni profiles of the UV resonance lines and on the wind emission lines such as H-alpha are described. The evidence for the variability and instability of the winds is derived from the UV observations of Discrete Absorption Components and their variability, the X-ray flickering in compact binaries and the H-alpha variations. The evidence for wind variations in Wolf-Rayet stars and Luminous Blue Variables is discussed briefly, as well as a possible explanation for the V/R variations of Be stars.

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