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Doppler Imaging of Variable Early-Type Stars∗

Published online by Cambridge University Press:  19 July 2016

Dietrich Baade
Dietrich Baade*
Affiliation:
Space Telescope-European Coordinating Facility, European Southern Observatory, Karl-Schwarzschild-Str. 2, D–8046 Garching, W. Germany

Abstract

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Line profile–variability (LPV) is very wide–spread among early–type stars. With the exception of inhomogeneous surface abundance distributions associated with magnetic fields, the LPV of bona fide non–magnetic stars is consistent with (often only with) nonradial pulsation (NRP). Peculiar surface chemistry and NRP may even be mutually exclusive, and there are other indications that in spite of the ubiquity of NRPs the distribution of their characterizing parameters in the HRD is far from being uniform. This may be important for uncovering the driving mechanism of NRPs in early–type stars.

Type
IV. Spectroscopic Patterns of Stellar Atmospheres
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 193 - 198
Copyright
Copyright © Kluwer 1988 

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