The eccentric-orbit binary model for the transient X-ray sources

Details The eccentric-orbit binary model for the transient X-ray sources The eccentric-orbit binary model for the transient X-ray sources

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..47..385o&link_type=abstract

Astrophysics and Space Science, vol. 47, Apr. 1977, p. 385-395.

Astronomy and Astrophysics

Astrophysics

18

Astronomical Models, Binary Stars, Eccentric Orbits, X Ray Sources, Acoustic Velocity, Orbit Calculation, Stellar Mass Accretion, Stellar Winds

Scientific paper

Eccentric-orbit binary models for transient X-ray sources are investigated. In these models, a compact star is in an eccentric orbit around a more massive star. As the compact star accretes mass from the stellar wind of the massive star, the accretion rate becomes time-dependent. The accretion rate is determined by Bondi's accretion radius, which depends on both the relative velocity of the stellar wind to the compact star and the sound velocity through the stellar wind. With reasonable sets of values for eccentricity, semimajor axis, stellar-wind velocity, and sound velocity, variations of the light curves are obtained which are compatible with observations for the transient X-ray sources. It is likely that many transient X-ray sources are explainable by eccentric-orbit binary models.

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