Properties of sources that may contribute the other half of the cosmic X ray background

Details Properties of sources that may contribute the other half of the cosmic X ray background Properties of sources that may contribute the other half of the cosmic X ray background

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.296..853s&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 853-855 (SEE N90-258

Astronomy and Astrophysics

Astronomy

4

Active Galactic Nuclei, Background Radiation, Cosmic Rays, Extraterrestrial Radiation, X Ray Sources, X Ray Spectra, Cosmic Noise, Rosat Mission, Spectral Bands, Spectrum Analysis, Stellar Luminosity

Scientific paper

Known types of extragalactic X-ray sources contribute about half of the cosmic X-ray background at 2 keV. The properties of the discrete sources that may provide the other half of the background are discussed. If these sources are Active Galactic Nuclei (AGNs) that evolve in space density and in spectrum or if the sources are a new unknown class they may be detected by ROSAT. If they are much rarer, then even AXAF (Advanced X-ray Astrophysics Facility) may not be able to detect such a potential contributor to the background.

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