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The Double-Mode Cepheids

Published online by Cambridge University Press:  12 April 2016

L. A. Balona
L. A. Balona*
Affiliation:
South African Astronomical Observatory

Abstract

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Recent observations of double-mode Cepheids and proposed candidates are reviewed. It appears that the change of modal content reported in some stars may not be real. Observations show that the double-mode Cepheids are indistinguishable from normal Cepheids of similar period. This poses a severe problem for pulsation theory which predicts very low masses from the ratio of first overtone to fundamental period. Attempts to resolve this problem and the problem of modal selection are discussed.

Type
Part I. Fundamental Parameters
Information
International Astronomical Union Colloquium , Volume 82: Cepheids: Theory and Observations , 1985 , pp. 17 - 29
Copyright
Copyright © Cambridge University Press 1985

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