Infrared photometry of HDE 226868 /Cyg X-1/ from 2.3 to 10 microns Mass loss rate

Details Infrared photometry of HDE 226868 /Cyg X-1/ from 2.3 to 10 microns Mass loss rate Infrared photometry of HDE 226868 /Cyg X-1/ from 2.3 to 10 microns Mass loss rate

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....92..238p&link_type=abstract

Astronomy and Astrophysics, vol. 92, no. 3, Dec. 1980, p. 238-241.

Astronomy and Astrophysics

Astronomy

20

Binary Stars, Infrared Astronomy, Infrared Photometry, Stellar Spectrophotometry, X Ray Stars, Mass Flow Rate, Stellar Envelopes, Stellar Mass Ejection, Stellar Winds, Supergiant Stars

Scientific paper

Infrared photometry between 2.3 and 10 microns, shows an ionized gaseous envelope surrounding the supergiant OB star HDE 226868, the optical counterpart of the X-ray binary system Cyg X-1. The mean extent of the envelope at 10 microns is approximately 1.3 R (asterisk). The mass loss rate of HDE 226868 derived from 10 microns ff + bf emission flux, adopting a wind velocity law of the type described by Castor and Lamers (1979) with beta = 2, is 3.5 x 10 to the -6th solar masses/yr. This value of the mass loss rate is sufficient to account for the X-ray emission of Cyg X-1, under the assumption that the X-ray source is powered by accretion from a stellar wind.

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