Research Papers in Physics and Astronomy

 

Date of this Version

9-15-1982

Document Type

Article

Citation

THE ASTROPHYSICAL JOURNAL, 260:L87-L90, 1982 September 15

Comments

Copyright 1982 The American Astronomical Society. All rights reserved.

Abstract

It is shown that increasing the opacity due to heavy elements by a factor of 2-3 leads to classical Cepheid models which reproduce observed period ratios at evolutionary masses and luminosities. Thus the mass anomalies are removed in both the double-mode and bump Cepheid regimes. The proposed increases may also serve to energize β Cephei variables, thus solving yet another important problem in the theory of pulsating stars. We argue that opacity changes of this order are not implausible and urge further work in this important area.

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