Quantum effects in pair cascade models of AGN spectra

Details Quantum effects in pair cascade models of AGN spectra Quantum effects in pair cascade models of AGN spectra

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..891b&link_type=abstract

In ESA, The 23rd ESLAB Symposium on Two Topics in X Ray Astronomy. Volume 2: AGN and the X Ray Background p 891-896 (SEE N90-258

Astronomy and Astrophysics

Astronomy

Active Galactic Nuclei, Electron Emission, Lorentz Transformations, Pair Production, Quantum Theory, Background Radiation, Compton Effect, Gamma Ray Spectra, Radiation Laws, X Ray Spectra

Scientific paper

The prediction that electrons with very high Lorentz factors can be produced in the central region of AGN (Active Galactic Nuclei) is considered. The recent steady state Compton pair cascade models of AGN X-ray and gamma-ray emission mechanisms need modification as quantum (Klein-Nishina) effects must be taken into account. These are examined in first order cascades. Their influence on the spectral indices of the hard X-ray and soft gamma-ray emission is assessed. The inclusion of scatterings in the quantum regime provides an increase in the particle population at high energies and flattens the gamma-ray spectra both above and below the pair absorption turnover. Difficulties in the fitting of spectral observations are created.

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