Photometry and spectroscopy of the O-type variable HD 167971

Details Photometry and spectroscopy of the O-type variable HD 167971 Photometry and spectroscopy of the O-type variable HD 167971

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...185..121l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 185, no. 1-2, Oct. 1987, p. 121-130.

Astronomy and Astrophysics

Astrophysics

32

Eclipsing Binary Stars, Light Curve, O Stars, Stellar Spectrophotometry, Stellar Winds, Variable Stars, Electrophotometers, Galactic Clusters, Hot Stars, Stellar Luminosity

Scientific paper

The authors present photometric and spectroscopic observations of the O-type variable HD 167971. From a period analysis of the visual light-curve they find P = 3.3213 days. Combining the photometric and spectroscopic data they derive a consistent model for the system which can be understood in terms of a close O-type eclipsing binary and a third, more distant companion of spectral type O. The latter star is the most luminous component of the system and dominates the optical and the UV spectrum. The mass loss rate of this star is derived from the Hα- and the UV-line profiles. The authors find M≅ 2×10-6M_sun;yr-1 and v = 3100 km s-1.

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