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Title:
Studies of late-type binaries. II - The physical parameters of VW Cephei
Authors:
Hill, G.
Affiliation:
AA(Dominion Astrophysical Observatory, Victoria, Canada)
Publication:
Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. 141-151. (A&A Homepage)
Publication Date:
07/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTRONOMICAL SPECTROSCOPY, BINARY STARS, CEPHEID VARIABLES, LATE STARS, LIGHT CURVE, ORBITAL ELEMENTS, STELLAR LUMINOSITY, STELLAR MASS
Bibliographic Code:
1989A&A...218..141H

Abstract

A spectroscopic/light curve study of VW Cephei yields a primary of 0.897 + or - 0.013 solar masses and 0.93 + or - 0.01 solar radii, a secondary of 0.247 + or - 0.007 solar masses and 0.50 + or - 0.01 solar radii, and a tertiary of 0.58 + or - 0.14 solar masses and 0.64 solar radii. Major period changes of -5.7 x 10 to the -6th in 1944, -6.8 x 10 to the -6th in 1950, 15.9 x 10 to the -6th in 1961 have occurred. A comparison of the derived physical parameters with the data of Hilditch et al. (1988) suggests that VW Cep AB is a W-type system and that the tertiary is a main-sequence object.

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