Cyclotron Features Formed by Anizotropic Relativistic Electrons in the Spectra of X-ray Pulsars

Astronomy and Astrophysics – Astrophysics

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Scientific paper

The spectrum of cyclotron radiation is calculated for anisotropically distributed relativistic electrons with a nonrelativistic velocity scattering across the magnetic field. It is shown that if such electrons are responsible for a formation of the "cyclotron" line in the spectrum of Her X-1, then the value of its magnetic field (3-6)cdot 1010 Gs following from this interpretation is in a good agreement with some other observations and theoretical estimations. Observations of a time dependence of the energy of this "cyclotron" line in the spectra of several X-ray pulsars is explained by a variability of the average longitude energy of the electrons, decreasing with increasing of the liminocity due to radiational braking of the accretion flow.

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