Evidence for a gas stream in GX301 - 2

Astronomy and Astrophysics – Astronomy

Scientific paper

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Gas Dynamics, Neutron Stars, Stellar Mass Accretion, Stellar Winds, X Ray Binaries, Stellar Luminosity, Stellar Models, Stellar Orbits

Scientific paper

Model calculations are used to study observed variations of column density and X-ray luminosity as a function of orbital phase. The models include a spherically symmetric stellar wind, and the wind plus three types of gas streams. The comparisons of the models with the data by least-squares fitting demonstrate that a gas stream is a necessary part of the models. A gas stream in systems like GX301-2 may be expected, based on the results of Stevens' model of enhanced stellar wind accretion for eccentric X-ray binaries.

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