Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-02-03
Astron. Reports, 1997, 41, 794
Astronomy and Astrophysics
Astrophysics
LaTeX, 8 pages, 7 EPS figures, using AAS2PP4 style (included)
Scientific paper
Results of numerical simulations of the impact of a common envelope on the matter flow pattern near the outflowing component in a semidetached binary system are presented. Three-dimensional modeling of the matter transfer gas dynamics in a low-mass X-ray binary X1822-371 enable investigation of the structure of flows in the vicinity of the inner Lagrange point L1. Taking into account the common envelope of the system substantially changes the flow pattern near the Roche surface of the outflowing component. In a stationary regime, accretion of common envelope gas is observed over a significant fraction of the donor star's surface, which inhibits the flow of gas along the Roche surface to L1. The change in the flow pattern is particularly significant near L1, where the stream of common envelope gas strips matter off the stellar surface. This, in turn, significantly increases (by an order of magnitude) the gas flow from the donor surface in comparison with the estimates of standard models.
Bisikalo Dimitry V.
Boyarchuk Alexander A.
Chechetkin V. M.
Kuznetsov Oleg A.
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