On Compton reflection in the sources of the cosmic X-ray background

Details On Compton reflection in the sources of the cosmic X-ray background On Compton reflection in the sources of the cosmic X-ray background

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..125z&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 1, p. 125-129.

Mathematics

Logic

22

Astronomical Models, Background Radiation, Compton Effect, Cosmic X Rays, Wave Reflection, X Ray Sources, Active Galactic Nuclei, Diffuse Radiation

Scientific paper

Consideration is given to recent models for the cosmic X-ray background that assume that it originates from unresolved AGN emitting spectra due to enhanced Compton reflection of a power-law photon spectrum incident on cold matter. The parameter space of the Compton reflection model is studied, and the allowed parameter space is found to be severely constrained by physical and cosmological effects. For an incident power-law energy index alpha is greater than about 1, the X-ray peak in the observed spectrum from a population of AGN is necessarily at an energy less than that of the observed peak. Two examples of improved fits to the X-ray background are shown. It is concluded that the Compton reflection models proposed to date do not provide a straightforward explanation of the X-ray background spectrum.

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