Physics
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976stin...7627133b&link_type=abstract
Threshold luminosity of accretions by a neutron star with a magnetic field NASA Transl. into ENGLISH of Russian report Pr-243 (M
Physics
Luminosity, Neutron Stars, Particle Density (Concentration), Stellar Magnetic Fields, Earth Magnetosphere, Flow Distribution, Flux Density, Gas Flow, Hydrodynamic Equations
Scientific paper
Accretion of matter by a magnetized neutron star, in the case of large mass fluxes, when the reaction of the outgoing radiation cannot be disregarded, is examined. Luminance at which the outgoing radiation must be taken into account was calculated. It was shown that the limiting X-ray luminance of accretions by a neutron star with a magnetic field depends strongly on accretion channel geometry and can exceed the critical Eddington value. Effects connected with flow around the magnetosphere of the neutron star are discussed in detail. It was shown that the layer of gas must be optically thick with respect to Thomson scattering and that it can reradiate a significant portion of the primary flux in the soft range. A necessary condition for supercritical luminance is asymmetric flow around the Alfven surface. Regular pulsations of both hard and soft X-rays are discussed within the framework of the proposed model.
Basko Mikhail
Syunyayev R. A.
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