Calculation of stellar-wind flow past an x-ray source

Details Calculation of stellar-wind flow past an x-ray source Calculation of stellar-wind flow past an x-ray source

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983izssr......106k&link_type=abstract

Akademiia Nauk SSSR, Izvestiia, Mekhanika Zhidkosti i Gaza (ISSN 0568-5281), July-Aug. 1983, p. 106-111. In Russian.

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Computation

Computational Fluid Dynamics, Flow Deflection, Neutron Stars, Stellar Winds, Wind Velocity, X Ray Sources, Gas Density, Plasma-Electromagnetic Interaction, Rarefied Gas Dynamics, Stellar Envelopes, Stellar Luminosity, Stellar Mass Accretion, Subsonic Flow

Scientific paper

A numerical study of the interaction of hard X-ray emission from a neutron star with a stellar wind is presented. It is shown that, as the result of heating, the stellar-wind flow near the source becomes subsonic and the gas density rho can decrease by more than an order of magnitude. This has a significant effect on the rate of accretion. An oscillatory regime of accretion may result in which rho decreases so significantly that the luminosity of the X-ray source decreases sharply. After a certain time sufficient for the separation of the envelope filled by the rarefied heated gas, conditions favorable for accretion are reestablished and the process is repeated.

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