Dust from early galaxies and the X-ray background radiation

B. Rudak, Peter Istvan Meszaros

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

We explore the effects of the scattering of cosmic X-ray background photons by dusty foreground galaxies, assuming the X-rays themselves arise in discrete sources. The effective angle of scattering is ∼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 ∼1 arcmin resolution. This can reduce the number of discrete sources required to explain the smoothness of the background to values greater than ∼103 deg-2. The effect may be stronger in the direction of distant clusters of galaxies, or if distant galaxies are much dustier than assumed here.

Original languageEnglish (US)
Pages (from-to)29-35
Number of pages7
JournalAstrophysical Journal
Volume371
Issue number1
DOIs
StatePublished - Apr 10 1991

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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