Angular distribution and polarization of X-ray burster radiation

Details Angular distribution and polarization of X-ray burster radiation Angular distribution and polarization of X-ray burster radiation

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985afz....23..503l&link_type=abstract

(Astrofizika, vol. 23, Nov.-Dec. 1985, p. 503-520) Astrophysics (ISSN 0571-7132), vol. 23, no. 3, May 1986, p. 663-674. Translat

Astronomy and Astrophysics

Astrophysics

2

Accretion Disks, Neutron Stars, Polarization Characteristics, Stellar Radiation, X Ray Binaries, Angular Distribution, Bursts, K Lines, Linear Polarization, Radiative Transfer, Stellar Luminosity

Scientific paper

The angular distribution and polarization of X-ray burster radiation have been calculated. It has been shown that the accretion disk around the neutron star intercepts and reradiates 23% of the burster luminosity during a flash. 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 ≈3.7% 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 disk reradiates up to 50% of the boundary layer radiation. The degree to which the radiation from the system is polarized depends rather weakly on the inclination angle of the system and is about 6%. Analytical formulae are obtained for the calculation of linear polarization of fluorescent K-line radiation of heavy elements coming from outer regions of accretion disks.

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