Dust from early galaxies and the X-ray background radiation

Details Dust from early galaxies and the X-ray background radiation Dust from early galaxies and the X-ray background radiation

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371...29r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 10, 1991, p. 29-35.

Statistics

Computation

4

Background Radiation, Cosmic Dust, Cosmic X Rays, Galactic Clusters, Galactic Evolution, Computational Astrophysics, Luminosity, Photons, X Ray Sources

Scientific paper

The effects of the scattering of cosmic X-ray background photons by dusty foreground galaxies are explored, assuming the X-rays themselves arise in discrete sources. The effective angle of scattering is about 1-10 arcmin in the 1-3 keV band, which can lead to a decrease in the spatial fluctuations of the background observed with an IPC-like imaging device with about 1 arcmin resolution. This can reduce the number of discrete sources required to explain the smoothness of the background to values greater than about 1000/sq deg. The effect may be stronger in the direction of distant clusters of galaxies, or if distant galaxies are much dustier than assumed here.

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