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Observational Aspects of Macroturbulence in Early Type Stars

Published online by Cambridge University Press:  12 April 2016

Dennis Ebbets
Dennis Ebbets*
Affiliation:
McDonald Observatory, University of Texas at Austin

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The basic premise of this paper is that the atmospheres of supergiants of spectral type 0, B, and A are not homogeneous static and stable. Observations show effects in the spectrum which seem to indicate velocity fields of many different scales, which probably are variable with depth and are certainly variable with time. Some effects can be understood in terms of global, steady, symmetric velocities, namely rotation and expansion. Those effects which still cannot be accounted for are generally attributed to turbulent velocities.

Type
2. Observed Properties of Stellar Turbulence
Information
International Astronomical Union Colloquium , Volume 51: Stellar Turbulence , 1980 , pp. 113 - 125
Copyright
Copyright © Springer-Verlag 1980

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