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The Frequency of Cepheid Binaries

Published online by Cambridge University Press:  12 April 2016

G. Russo
G. Russo*
Affiliation:
Capodimonte Astronomical Observatory, Naples, Italy

Abstract

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We summarize the methods now available to detect the presence of companions to Cepheids, and then we analyze the results of the application of the recent photometric method proposed by Fernie (1980). If applied to the set of VBLUW observations of southern Cepheids carried out by Pel (1976), this method gives a frequency of about 25%, which is consistent with the more recent spectroscopic determinations (Gieren, 1981). The importance of the IUE satellite to directly observe the U flux emitted by the B-companion is emphasized.

Type
Part I: Evolution of Stars in the Post-Main Sequence Stage
Information
International Astronomical Union Colloquium , Volume 69: Binary and Multiple Stars as Tracers of Stellar Evolution , 1982 , pp. 23 - 26
Copyright
Copyright © Reidel 1982

References

Abt, H.A.: 1959, Astrophys. J. 130, 769 CrossRefGoogle Scholar
Abt, H.A. and Levy, S.G.: 1978, Astrophys. J. Suppl. 36, 241 CrossRefGoogle Scholar
Eichendorf, W., Heck, A., Isserstedt, J., Lub, J., Pakuli, M., Reipurth, B., and van Genderen, A.M.: 1981, Astron. Astrophys. 93, L5–L6Google Scholar
Fernie, J.D.: 1979, Publ. Astron. Soc. Pac. 91, 67 CrossRefGoogle Scholar
Fernie, J.D.: 1980, Astron. Astrophys. 87, 227 Google Scholar
Gieren, W.: 1981, Astrophys. J., submitted Google Scholar
Lloyd Evans, T.: 1981, Mon. Not. Roy. Astron. Soc. 141, 109 CrossRefGoogle Scholar
Madore, B.F.: 1977, Mon. Not. Roy. Astron. Soc. 178, 505 CrossRefGoogle Scholar
Madore, B.F. and Fernie, J.D.: 1980, Pub. Astron. Soc. Pac. 92, 315 CrossRefGoogle Scholar
Mariska, J.T., Doschek, G.A., and Feldman, U.: 1980, Astrophys. J. Lett. 238, L87–L90CrossRefGoogle Scholar
Petrie, R.M.: 1963, in Basic Astronomical Data, p. 64 (Univ. of Chicago Press)Google Scholar
Pel, J.W.: 1976, Astron. Astrophys. Suppl. 24, 413 Google Scholar
Pel, J.W.:1978, Astron. Astrophys. 62, 75 Google Scholar
Russo, G. Sollazzo, C., and Coppola, M.: 1981, Astron. Astrophys, in pressGoogle Scholar