Constraints on the Nature of the Massive X-ray Binary GX301-2

Details Constraints on the Nature of the Massive X-ray Binary GX301-2 Constraints on the Nature of the Massive X-ray Binary GX301-2

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..nws.c3004l&link_type=abstract

American Physical Society, Fourth Annual Meeting of the Northwest Section, abstract #C3.004

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GX301-2 is a massive early-type star with a strong stellar wind, in an eccentric orbit (e=0.47) with a neutron star. The neutron star accretes from the stellar wind and exhibits regular x-ray flares approximately 1.4 days prior to periastron passage. Long-term continuous x-ray monitoring of GX301-2 by the RXTE/ All-Sky-Monitor has now been carried out for a period of 5 years, yielding the highest quality orbital x-ray light curve yet. The main flux peak just prior to periastron is accurately characterised, as well as a secondary broad peak near apastron. A model of the binary system and stellar wind is constructed, and compared to the new x-ray light curve and to previous other data on GX301-2. Various properties of the system are constrained, including the orbital inclination, the properties of the stellar wind, and the mass, radius and rotation rate of the star.

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