The import of the Alfven surface for the X-ray pulse formation in accreting pulsars

Details The import of the Alfven surface for the X-ray pulse formation in accreting pulsars The import of the Alfven surface for the X-ray pulse formation in accreting pulsars

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sva....20..537b&link_type=abstract

Soviet Astronomy, Vol. 20, p.537

Astronomy and Astrophysics

Astronomy

23

Centaurus Constellation, Hercules Nova, Pulsed Radiation, Stellar Models, X Ray Sources, Magnetohydrodynamic Waves, Plasma Layers, Polarization (Waves), Pulsars, Radiative Transfer, Spectrum Analysis, Stellar Luminosity

Scientific paper

A model is proposed for the X-ray pulsation of Her X-1 and Cen X-3. It is suggested that if accretion onto a magnetized neutron star proceeds through the disk, the plasma layer occupying some part of the Alfven surface and spinning together with the neutron star regularly shields the bright spots at magnetic poles where the main accretion energy is released. This causes the observed hard X-ray flux to pulsate. The plasma layer on the Alfven surface is a source of weakly pulsating soft X-ray flux. This mechanism is exemplified for Her X-1.

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