Interpretation of spectral paradox of cosmic X-ray background.

Details Interpretation of spectral paradox of cosmic X-ray background. Interpretation of spectral paradox of cosmic X-ray background.

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997sccha..40..105l&link_type=abstract

Science in China, Series A, Vol. 40, No. 1, p. 105 - 112

Physics

Active Galactic Nuclei: X Rays

Scientific paper

The integrated spectrum of discrete X-ray sources (mainly the active galactic nuclei, AGN) is inconsistent with the observed spectrum of cosmic X-ray background (CXB), and it is so called CXB spectral paradox. The medium X-ray spectra of 68 AGNs are adopted, the evolution function of X-ray spectral indices is analyzed statistically, the fraction of CXB is calculated due to AGNs X-ray emission, which shows that almost 100% CXB comes from AGNs X-ray emission. Especially, the integrated spectrum in 2 - 10 keV is consistent with the observed spectrum of CXB. The spectral paradox of CXB can be interpreted by this result.

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