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Cepheid companions and the masses of cepheids

Published online by Cambridge University Press:  04 August 2017

Erika Böhm-Vitense ,
Susan Borutzki  and
Hugh Harris
Erika Böhm-Vitense
Affiliation:
Astronomy Department, University of Washington, Seattle, WA
Susan Borutzki
Affiliation:
Astronomy Department, University of Washington, Seattle, WA
Hugh Harris
Affiliation:
Astronomy Department, University of Washington, Seattle, WA

Abstract

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We have observed in the ultraviolet the hot companions of the Cepheids SV Per, RW Cam, SY Nor and KN Cen. The study of the absolute and relative intensities reveals that all, except the companion for KN Cen are evolved stars which should fit on almost the same mass track as the Cepheid. We find however that with generally accepted reddening values the companions of at least SV Per and RW Cam are too faint. Either the Cepheid loops are more luminous than presently calculated or the reddening is larger than presently accepted.

Type
III. BINARITY, PULSATION, ROTATION AND MIXING
Information
Symposium - International Astronomical Union , Volume 105: Observational Tests of the Stellar Evolution Theory , 1984 , pp. 449 - 452
Copyright
Copyright © Reidel 1984 

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