The magneto-Coulomb radiation of ultrarelativistic electrons in a strong magnetic field

Astronomy and Astrophysics – Astronomy

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Coulomb Collisions, Landau Factor, Neutron Stars, Radiation Distribution, Relativistic Electron Beams, Stellar Magnetic Fields, Angular Distribution, Atomic Energy Levels, Gamma Rays, Ground State

Scientific paper

The propagation of ultrarelativistic (TeV or higher) electrons along the lines of an intense (TG) magnetic field and the resulting generation of hard gamma radiation by the Joint action of matter and the magnetic field (the magneto-Coulomb mechanism, MCM, proposed by Kel'ner and Kotov, 1985) are investigated analytically. In the MCM, the particles undergo Coulomb collisions with the target matter and are raised to excited Landau states, and gamma photons are generated as they undergo radiative transition to lower levels. The MCM cross sections for the case of a fully ionized plasma target are calculated, and the spectrum, angular distribution, and polarization of the MCM radiation are determined. It is shown that the electron energy loss due to MCM radiation is dominant for conditions consistent with the two-level approximation employed. The implications of the MCM for the gamma emission of neutron stars are considered.

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