Self-excitation effect in the scattering of electromagnetic radiation in a strong magnetic field

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cold Plasmas, Magnetic Flux, Pulsars, Self Excitation, Stellar Magnetic Fields, Thomson Scattering, X Ray Stars, Cyclotron Frequency, Electromagnetic Scattering, Electron Scattering, Incident Radiation, Thermodynamic Equilibrium

Scientific paper

It is pointed out that the electron scattering of incident electromagnetic radiation of frequency omega(i) includes also a component with the cyclotron frequency omega(L). Except in the limit omega(i) much greater than omega(L), this 'self-excited effect" modifies appreciably the cross section. The modified cross section for a classical nonrelativistic electron is given in this paper for both a single electron and a cold plasma. The spectral distribution of electron scattering is discussed and the Thomson absorption coefficient of a magnetized thermal equilibrium plasma is obtained for some typical cases. The results obtained here may be relevant to astrophysical processes, such as the spectrum formation of X-ray pulsars.

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