The Wolf-Rayet star HD 193077 - Evidence for a low-mass companion and the possibility of a third body

Astronomy and Astrophysics – Astrophysics

Scientific paper

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B Stars, Binary Stars, O Stars, Stellar Mass, Stellar Spectra, Wolf-Rayet Stars, Astronomical Spectroscopy, Line Spectra, Neutron Stars, Stellar Envelopes

Scientific paper

HD 193077 is shown to probably consist of three stars: (1) a WN 6 star with (2) a neutron star in 2.3238-day orbit, and (3) a fainter, rapidly rotating late O main-sequence star which the first two circle in 1763 days. Although this makes HD 193077 the sixth galactic W-R star which may contain a compact companion, it is unique in possessing a third body. The effect produced on the present system by the rapid ejection of a supernova shell in the formation of the supposed neutron star will have been reduced by the presence of the OB star.

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