Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984xue..conf..188z&link_type=abstract
In Max-Planck Inst. für Physik und Astrophysik X-Ray and UV Emission from Active Galactic Nuclei p 188-192 (SEE N85-17790 08-88)
Astronomy and Astrophysics
Astrophysics
Compton Effect, Galactic Nuclei, Gamma Ray Spectra, Pair Production, Relativistic Plasmas, Thermal Plasmas, X Ray Spectra, Active Galactic Nuclei, Astronomical Models, Emission Spectra, Optical Thickness, Photons
Scientific paper
Pair equilibrium in thermal plasmas emitting power law photon spectra by repeated Compton scatterings of a soft photon source active galactic nuclei was studied. Dependence of the spectral index on optical thickness and on temperature of the plasma is discussed. The equation for pair equilibrium is solved for the maximum steady luminosity. Analytical solutions for the subrelativistic region, and for the ultrarelativistic region are found. In the transrelativistic region the solutions are expressed by single integrals over the pair production cross sections, performed numerically. The constraints on soft photon source imposed by the condition that the soft photon flux cannot exceed the black-body flux are considered. For the Comptonized synchrotron radiation model a relation between magnetic field strength and output luminosity is found.
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