Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..80..157l&link_type=abstract
Astrophysics and Space Science, vol. 80, no. 1, Nov. 1981, p. 157-172.
Astronomy and Astrophysics
Astrophysics
3
Binary Stars, Bremsstrahlung, Pulsars, Stellar Magnetic Fields, X Ray Sources, Astronomical Models, Electron Plasma, Linear Polarization, Momentum Transfer, Plasma Radiation, Stellar Radiation
Scientific paper
The postulate that electron bremsstrahlung in a strong external magnetic field is the dominant radiation mechanism with the accretion plasma near the magnetic polar regions of binary X-ray sources is discussed, and it is noted that earlier works on the cross section for such a process have proved to be unsatisfactory. Use is made of the simple structure of the propagator obtained in a previous calculation for mildly relativistic electrons occupying no more than the first few Landau levels. Special emphasis is given to the integration over the possible range of momentum transfer during a single collision with the ion. Characteristic behavior for two linear polarization modes is illustrated for forward and backward electron scattering. It is found that the previously predicted behavior at low frequencies for the two modes is correct only in the limit of weak field and large momentum transfer. At higher frequencies resonances are present regardless of the polarization of the emitted radiation.
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