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On Compton reflection in the sources of the cosmic X-ray backgroundConsideration 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.
Document ID
19930044637
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zdziarski, Andrzej A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Zycki, Piotr T.
(Polish Academy of Sciences, Astronomical Center Warsaw, Poland)
Svensson, Roland
(Stockholm Observatory Saltsjobaden, Sweden)
Boldt, Elihu
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 405
Issue: 1
ISSN: 0004-637X
Subject Category
Space Radiation
Accession Number
93A28634
Funding Number(s)
CONTRACT_GRANT: NAG5-1813
CONTRACT_GRANT: NAG5-1570
CONTRACT_GRANT: NATO-CRG-0524/90
Distribution Limits
Public
Copyright
Other

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