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Orbital Solution and Physical Parameters of the Binary Cepheid AW Per

Published online by Cambridge University Press:  15 February 2018

J. Vinko
J. Vinko*
Affiliation:
JATE University, Szeged, and Konkoly Observatory, Budapest, Hungary

Extract

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AW Per is a well-known binary Cepheid. Recently Welch & Evans (1989) determined a spectroscopic orbit. Evans (1989) pointed out that the spectral type of the companion is incompatible with the mass function of the system. We re-determined the orbit of AW Per using both photometric and spectroscopic data. The result of the simultanuous least-squares fit can be seen on Fig.l. The orbital elements are very close to the results of Welch & Evans. After correcting for the companion, the Cepheid's light and velocity curves were analyzed with the surface-brightness method. The details of the analysis will be published in MNRAS (Vinko, 1992). The mass of AW Per was found to be 6 solar masses, which confirms the mass-problem of the secondary. Observations are planned to continue at Konkoly Observatory.

Type
Windows on the Instability Strip
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 408
Copyright
Copyright © Cambridge University Press 1993

References

Evans, N.R., 1989, Astron.J. 97, 1737.Google Scholar
Vinko, J., 1992, Mon.Not.Royal Astron.Soc. (in press)Google Scholar
Welch, D.L. & Evans, N.R., 1989, Astron.J. 97, 1153.CrossRefGoogle Scholar