Role of the Alfven surface in the formation of X-ray pulses in accreting pulsars

Details Role of the Alfven surface in the formation of X-ray pulses in accreting pulsars Role of the Alfven surface in the formation of X-ray pulses in accreting pulsars

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..950b&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, Sept.-Oct. 1976, p. 950-956. In Russian.

Astronomy and Astrophysics

Astrophysics

3

Astrophysics, Magnetohydrodynamics, Pulsars, Stellar Atmospheres, Stellar Models, X Ray Sources, Light Curve, Periodic Variations, Plasma Layers, Stellar Magnetic Fields, X Ray Astronomy

Scientific paper

Analysis of experimental data shows that the pulsations of X-ray flux from the sources Her X-1 and Cen X-3 cannot be explained without invoking a special mechanism for the formation of X-ray pulses of the observed shape. In disk accretion onto a magnetized neutron star, the layer of plasma flowing along the Alfven surface rotates along with the star and regularly conceals from an observer the region of magnetic poles where energy of the incident gas is given off. This leads to pulsations of the observed flux of hard X-radiation. The plasma layer on the Alfven surface is a source of weakly pulsating soft X-ray flux.

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