On detecting diffuse ultraviolet radiation of cosmological origin

Details On detecting diffuse ultraviolet radiation of cosmological origin On detecting diffuse ultraviolet radiation of cosmological origin

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gedm.work...28p&link_type=abstract

Presented at the 1st Workshop on Galactic and Extragalactic Dark Matter, Rome, 28-30 Jun. 1983

Astronomy and Astrophysics

Astronomy

Background Radiation, Ultraviolet Astronomy, Ultraviolet Radiation, Cosmic Dust, Cosmology, Elementary Particles, Galactic Radiation, Intergalactic Media, Luminous Intensity, Red Shift

Scientific paper

The intensity of diffuse extragalactic background radiation is determined by the integrated emission of all sources along a given line of sight through the universe and by absorption due to intervening cool gas and dust. Due to redshift and lookback-time effects, more distant objects contribute at a given wavelength today with light emitted at earlier epochs at shorter wavelengths. Possible sources of ultraviolet (100 to 3000 A) emission include, but may not be restricted to, galaxies and quasars, a lukewarm or photoionized dense intergalactic medium and a cosmological sea of decaying massive neutrinos and photinos formed in the hot big bang. The resultant complex spatial intensity pattern and spectral distribution will appear superimposed on an intense galactic emission source whose main characteristics have yet to be clearly and satisfactorily established. Although substantial progress has been made recently in understanding galactic emission mechanisms, the remaining uncertainties substantially limit the accuracy with which a cosmologically significant signal may be disentangled from the diffuse galactic background noise.

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