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A possible solution to the cepheid mass problem?

  • Erika Böhm-Vitense
Cepheids
Part of the Lecture Notes in Physics book series (LNP, volume 274)

Abstract

With new, smaller distances of the Cepheids, as determined recently by Schmidt (1984) and by Böhm-Vitense (1985), smaller pulsational masses are obtained than previously. Giant companions of Cepheids show that the luminosities of the Cepheids are too large in comparison with those of the giants. If increased mixing, for instance by convective overshoot at the boundary of the convective core during the main sequence stage, is responsible for this, then we expect an increase in the luminosity of the Cepheids of a given mass by approximately a factor of 4 as compared to conventional evolution calculations. Taking into account both of these effects we find good agreement between the corrected evolutionary masses, the pulsational masses, the dynamical masses, the giant companion masses and the Wesselink masses. The bump masses are only slightly smaller than the other masses.

Keywords

Massive Star Stellar Evolution Close Binary System Evolutionary Track Convective Core 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Becker, S. A., and Cox, A. N. 1982, Ap.J., 260, 707.Google Scholar
  2. Becker, S. A., Iben, I., and Tuggle, R. S. 1977, Ap.J., 218, 633Google Scholar
  3. Böhm-Vitense, E. 1985, Ap.J., 296, 169.Google Scholar
  4. Böhm-Vitense, E. 1981, Ann. Rev. Astr. Astrophys., 19, 295.Google Scholar
  5. Böhm-Vitense, E. 1986, Ap.J., 303, 262.Google Scholar
  6. Böhm-Vitense, E. and Proffitt, C. 1985, Ap.J., 296, 175.Google Scholar
  7. Cox, A. N., 1980, Ann. Rev. Astr. Astrophys., 18, 15.Google Scholar
  8. Iben, I. and Tuggle, R. S. 1972, Ap.J., 173, 135.Google Scholar
  9. Schmidt, E. 1984, Ap.J., 285, 501.Google Scholar

Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Erika Böhm-Vitense
    • 1
  1. 1.University of WashingtonSeattle

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