Physical parameters of the visible component of Cygnus X-1

Details Physical parameters of the visible component of Cygnus X-1 Physical parameters of the visible component of Cygnus X-1

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984azh....61..152a&link_type=abstract

(Astronomicheskii Zhurnal, vol. 61, Jan.-Feb. 1984, p. 152-156) Soviet Astronomy (ISSN 0038-5301), vol. 28, Jan.-Feb. 1984, p. 9

Astronomy and Astrophysics

Astronomy

2

Binary Stars, Cygnus Constellation, Stellar Spectra, Supergiant Stars, X Ray Sources, Hot Stars, Mass To Light Ratios, Orbital Elements, Stellar Atmospheres, Stellar Composition, Stellar Mass Ejection, Stellar Structure, Stellar Temperature, Variable Stars

Scientific paper

The physical parameters of the supergiant HDE 226868, the visible component of Cygnus X-1, are refined by quantitative spectral methods from spectral material obtained on the six-meter telescope of the Special Astrophysical Observatory, USSR Academy of Sciences. The values of the spectral class, effective temperature, radius, luminosity, and acceleration of gravity are determined and their variation with the phase of the orbital period are revealed; the mass of the visible component of the system is determined as 37.6 + or - 1.5 solar masses and the rate of mass loss is estimated as (1.5 - 2) x 10 to the -6th solar mass/yr.

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