Simultaneous Solutions of X-ray Binary Parameters

Details Simultaneous Solutions of X-ray Binary Parameters Simultaneous Solutions of X-ray Binary Parameters

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.3203w&link_type=abstract

American Astronomical Society, 181st AAS Meeting, #32.03; Bulletin of the American Astronomical Society, Vol. 24, p.1169

Astronomy and Astrophysics

Astronomy

Scientific paper

Parameters of X-ray/optical binaries usually are determined separately from optical light curves and from X-ray and optical velocity curves, most often without applying the X-ray eclipse duration constraint. Using the X-ray pulse observations along with with published light curves and radial velocity curves for the optical star of SMC X-1/Sk 160 , we determine the orbital parameters by simultaneous differential corrections, with the solution constrained to reproduce the X-ray eclipse duration. Our early experiments showed that the accretion disk around the neutron star contributes a non-negligible fraction of the total system light, so we allow for the adjustment of the disk light. A discussion of a possible non-synchronous rotation of the optical star is also given. A new scheme is presented for analyzing pulse arrival times, simultaneously with light and velocity curves, for systems with eccentric orbits, such as Vela X-1/HD 77581.

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