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Pulsations of the R Coronae Borealis Stars

Published online by Cambridge University Press:  12 April 2016

J. P. Cox ,
D. S. King ,
A. N. Cox ,
J. C. Wheeler ,
C. J. Hansen  and
S. W. Hodson
J. P. Cox
Affiliation:
Joint Institute for Laboratory Astrophysics, Univ. of Colo. and National Bureau of Standards, Boulder, CO 80309
D. S. King
Affiliation:
Univ. of New Mexico, Albuquerque, NM 87131
A. N. Cox
Affiliation:
Los Alamos Scientific Lab., Los Alamos, NM 87544
J. C. Wheeler
Affiliation:
Joint Institute for Laboratory Astrophysics, Univ. of Colo. and National Bureau of Standards, Boulder, CO 80309
C. J. Hansen
Affiliation:
Joint Institute for Laboratory Astrophysics, Univ. of Colo. and National Bureau of Standards, Boulder, CO 80309
S. W. Hodson
Affiliation:
Los Alamos Scientific Lab., Los Alamos, NM 87544

Abstract

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The radial pulsations of very luminous, low-mass models (L/M ˜ 104, solar units), which are possible representatives of the R CrB stars, have been examined. These pulsations are extremely nonadia–batic. We find that there are in some cases at least one extra (“strange”) mode which makes interpretation difficult. The blue instability edges are also peculiar, in that there is an abrupt excursion of the blue edge to the blue for L/M sufficiently large. The range of periods of the model encompasses observed periods of the Cepheid-like pulsations of actual R CrB stars.

Type
VIII. R Coronae Borealis Pulsations
Information
International Astronomical Union Colloquium , Volume 58: Stellar Hydrodynamics , August 1980 , pp. 529 - 535
Copyright
Copyright © Reidel 1980

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