Cosmic far-ultraviolet background radiation - Probe of a dense hot intergalactic medium

Details Cosmic far-ultraviolet background radiation - Probe of a dense hot intergalactic medium Cosmic far-ultraviolet background radiation - Probe of a dense hot intergalactic medium

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231l..61s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 231, July 15, 1979, p. L61-L65.

Mathematics

Logic

19

Background Radiation, Cosmic Rays, Far Ultraviolet Radiation, Intergalactic Media, Light Emission, Black Body Radiation, Gas Density, High Temperature Gases, Interstellar Gas, Optical Emission Spectroscopy, Quasars, X Rays

Scientific paper

Line and continuum radiation fluxes have been computed for a wide range of enriched intergalactic medium (IGM) models. Observations of the diffuse extragalactic light at optical and far-ultraviolet wavelengths are found to provide a potentially important probe of a dense hot intergalactic medium. If the diffuse X-ray background is produced by this gas, the models constrain the cosmological density parameter (Omega) to be less than 0.4. The associated Compton distortions of the cosmic blackbody background radiation and the optical depths to distant quasars at X-ray wavelengths are also evaluated.

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