The 3U 0900-40 binary system - Orbital elements and masses

Details The 3U 0900-40 binary system - Orbital elements and masses The 3U 0900-40 binary system - Orbital elements and masses

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...206l.103r&link_type=abstract

Astrophysical Journal, vol. 206, June 1, 1976, pt. 2, p. L103-L106.

Astronomy and Astrophysics

Astronomy

75

Binary Stars, Neutron Stars, Orbital Elements, Stellar Motions, X Ray Stars, Circular Orbits, Companion Stars, Eccentric Orbits, Spaceborne Astronomy, Stellar Mass

Scientific paper

Observations of the 283-s X-ray pulsations from 3U 0900-40 (Vela X-1) over a 36-day interval have led to a determination of the orbital elements for the X-ray star. These elements yield an X-ray mass function of about 18.5 solar masses and, when combined with the results of optical studies of the companion star HD 77581, give a probable lower limit of 1.4 solar masses to the mass of the X-ray star.

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