Studies of late-type binaries. II - The physical parameters of VW Cephei

Details Studies of late-type binaries. II - The physical parameters of VW Cephei Studies of late-type binaries. II - The physical parameters of VW Cephei

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...218..141h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 218, no. 1-2, July 1989, p. 141-151.

Astronomy and Astrophysics

Astrophysics

31

Astronomical Spectroscopy, Binary Stars, Cepheid Variables, Late Stars, Light Curve, Orbital Elements, Stellar Luminosity, Stellar Mass

Scientific paper

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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