HD 191765 - A Wolf-Rayet binary with a low-mass companion

Details HD 191765 - A Wolf-Rayet binary with a low-mass companion HD 191765 - A Wolf-Rayet binary with a low-mass companion

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sval....8..156a&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 8, May 1982, p. 290-296.) Soviet Astronomy Letters, vol. 8, May-June 1982, p. 156-160.

Astronomy and Astrophysics

Astronomy

26

Companion Stars, Eclipsing Binary Stars, Stellar Mass, Wolf-Rayet Stars, Emission Spectra, Light Curve, Line Spectra, Radial Velocity, Ultraviolet Photometry

Scientific paper

The discovery of periodic photometric and spectroscopic variability in HD 191765 with a period of 7.44 d + or - 0.10 d is reported. This, it is thought, might signify that this WR star is a close binary system paired with a low-mass (approximately 1 solar mass) companion. The evolutionary arguments made by van den Heuvel (1976) and Masevich et al. (1976) make it plausible that the companion could be a neutron star. It is reasoned that with an optical luminosity of approximately 1.9 x 10 the 36 erg/sec and a mass of approximately 0.95-1.95 solar masses, the companion cannot be a normal star. Given a period of 7.44 d and a combined mass of approximately 11 solar masses, the components of the system would be separated by approximately 36 solar radii.

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