Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-02-12
Astronomy and Astrophysics
Astrophysics
7 pages, 7 figures
Scientific paper
10.1111/j.1365-2966.2008.13099.x
In an attempt to model the accretion onto a neutron star in low-mass X-ray binaries, we present two-dimensional hydrodynamical models of the gas flow in close vicinity of the stellar surface. First we consider a gas pressure dominated case, assuming that the star is non-rotating. For the stellar mass we take $M_{\rm star}=1.4 \times 10^{-2} \msun$ and for the gas temperature $T=5 \times 10^6$ K. Our results are qualitatively different in the case of a realistic neutron star mass and a realistic gas temperature of $T\simeq 10^8$ K, when the radiation pressure dominates. We show that to get the stationary solution in a latter case, the star most probably has to rotate with the considerable velocity.
Babkovskaia Natalia
Brandenburg Axel
Poutanen Juri
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