Influence of vacuum polarization by strong magnetic field on the cyclotron radiation of a thermal plasma

Details Influence of vacuum polarization by strong magnetic field on the cyclotron radiation of a thermal plasma Influence of vacuum polarization by strong magnetic field on the cyclotron radiation of a thermal plasma

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979zhpmr..30..137p&link_type=abstract

(ZHETF Pis'ma v Redaktsiiu, vol. 30, July 20, 1979, p. 137-142.) JETP Letters, vol. 30, July 20, 1979, p. 125-130. Translation.

Computer Science

3

Cyclotron Resonance, High Temperature Plasmas, Plasma Radiation, Polarization Characteristics, Thermal Plasmas, Vacuum Effects, Angular Distribution, Circular Polarization, Electron-Positron Pairs, Linear Polarization, Magnetic Fields

Scientific paper

The effects of the virtual production of electron-positron pairs in a strong magnetic field on the cyclotron radiation of a collisionless thermal plasma are investigated. Expressions for the index of refraction, absorption coefficients and polarizations of normal waves in a rarefied thermal plasma are obtained. Analysis of the expressions indicates that the polarization of the vacuum qualitatively alters the ellipticity and positional angles of normal wave polarization ellipses in the vicinity of the first cyclotron resonance, which in turn changes the ratio between normal wave absorption coefficients and displaces their absorption maxima. The intersection point of the index of refraction is also shifted by vacuum polarization, along with the absorption coefficients for ordinary and extraordinary normal waves at higher harmonics and the circular and linear polarization of both optically thin and optically thick plasmas. It is also found that vacuum polarization in the emitting region of X-ray pulsars leads to an enhancement of cyclotron lines accompanied by their shift, broadening and contour modification, which are strongly dependent on angular position.

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