Angular distribution and polarization of X-ray-burster radiation (during stationary and flash phases)

Details Angular distribution and polarization of X-ray-burster radiation (during stationary and flash phases) Angular distribution and polarization of X-ray-burster radiation (during stationary and flash phases)

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.217..291l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 217, Nov. 15, 1985, p. 291-303.

Statistics

Computation

43

Angular Distribution, Computational Astrophysics, Linear Polarization, Neutron Stars, Radiant Flux Density, X Ray Sources, Binary Stars, Bursts, Energy Dissipation, Polarized Electromagnetic Radiation, Radiation Distribution, Stellar Mass Accretion, Thermonuclear Explosions

Scientific paper

The angular distribution and polarization of radiation from X-ray bursters have been calculated. It is shown that the accretion disc around the neutron star intercepts and re-radiates 23 per cent of burster luminosity during a flash (28 per cent if general relativity is taken into account). The result is a strong dependence of radiation flux from the burster during the flash on the inclination angle of the system. The degree of linear polarization of burster radiation during the flash reaches the maximum value of 3.7 per cent in the direction of ≡72.4° from the normal. In periods between flashes the stationary X-radiation is provided mainly by the boundary layer. The disc re-radiates up to 50 per cent of the boundary-layer radiation. This results in the abrupt variation of the stationary X-ray flux direction. The degree to which the radiation from the system is polarized depends only weakly on the inclination angle of the system and is about 6 per cent.

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