Pulsations of the R Coronae Borealis stars |
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| Authors: | J. P. Cox J. C. Wheeler C. J. Hansen D. S. King A. N. Cox S. W. Hodson |
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| Affiliation: | (1) Joint Institute for Laboratory Astrophysics, Univ. of Colo. and National Bureau of Standards, 80309 Boulder, CO;(2) Univ. of New Mexico, 87131 Albuquerque, NM;(3) Los Alamos Scientific Lab., 87544 Los Alamos, NM |
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| Abstract: | 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 nonadiabatic. 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. |
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