Quantum theory of cyclotron emission and the X-ray line in HER X-1

Details Quantum theory of cyclotron emission and the X-ray line in HER X-1 Quantum theory of cyclotron emission and the X-ray line in HER X-1

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....95...86m&link_type=abstract

Astronomy and Astrophysics, vol. 95, no. 1, Feb. 1981, p. 86-93.

Astronomy and Astrophysics

Astrophysics

36

Binary Stars, Cyclotron Radiation, Gyromagnetism, Quantum Theory, X Ray Sources, X Ray Spectra, Cold Plasmas, Cyclotron Frequency, Landau Factor, Magnetic Field Configurations, Modes, Optical Thickness, Polarized Electromagnetic Radiation, Wave Propagation

Scientific paper

Results obtained from the quantum theory of gyromagnetic emission are presented and the general theory is summarized. The nonrelativistic approximation is carried out and several relevant transition rates are evaluated explicitly. It is argued that the case of most interest concerns cyclotron emission into linearly polarized modes with a refractive index of approximately one by a nonrelativistic nondegenerate bi-Maxwellian distribution. The theory is applied to the interpretation of the cyclotron line in Her X-1, and it is concluded that the observational data are compatible with thermal emission from a hot spot having a temperature of approximately 25 keV.

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