Tidal Stream as Origin of X-ray Outburst in GX 301-2

Details Tidal Stream as Origin of X-ray Outburst in GX 301-2 Tidal Stream as Origin of X-ray Outburst in GX 301-2

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1010..201l&link_type=abstract

A POPULATION EXPLOSION: The Nature & Evolution of X-ray Binaries in Diverse Environments. AIP Conference Proceedings, Volume 10

Computer Science

X-Ray Binaries, X-Ray Sources, X-Ray Bursts, Accretion And Accretion Disks

Scientific paper

GX 301-2 is an X-ray binary system with a neutron star in an eccentric orbit accreting from the stellar wind of a massive early-type companion. We model the stellar wind and accretion onto the neutron star, including calculation of the dynamics of a gas stream emanating from the sub-L1 point of the massive companion. We compare models of X-ray flux vs. orbital phase and column density vs. orbital phase to observations. The data are from the Rossi X-ray Timing Explorer (RXTE) Proportional Counter Array (PCA) and All-Sky Monitor (ASM). We confirm the existence of the tidal accretion stream and determine wind and stream properties such as mass-loss rates and velocities. In addition we find secular changes in the orbital light curve: bright, medium and dim phases differ in the mass-loss rate in the stellar wind and in the central density of the accretion stream.

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