The diffuse X-ray background and the intergalactic medium

Details The diffuse X-ray background and the intergalactic medium The diffuse X-ray background and the intergalactic medium

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..222..329l&link_type=abstract

In: After the first three minutes; Proceedings of the 1st Astrophysics Workshop, Univ. of Maryland, College Park, Oct. 15-17, 19

Astronomy and Astrophysics

Astrophysics

3

Active Galactic Nuclei, Diffuse Radiation, Intergalactic Media, Relic Radiation, X Ray Spectra, Bremsstrahlung, Compton Effect, Electron Distribution, Electron Energy, Emission Spectra

Scientific paper

The possible origin of the X-ray background (XRB) from a hot intergalactic medium (IGM), as opposed to discrete sources, is critically analyzed. The Comptonization of the microwave background radiation by the IGM is discussed for an arbitrary electron distribution function, using a multiple-scattering approach for relativistic Comptonization. The recent spectral results from COBE can be used to rule out the existence of a homogeneous hot IGM as the dominant source of the XRB. The alternative possibility of Bremsstrahlung emission by a clumped IGM is considered.

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