Far-ultraviolet diffuse background and galaxy counts

Details Far-ultraviolet diffuse background and galaxy counts Far-ultraviolet diffuse background and galaxy counts

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...284...12a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 284, no. 1, p. 12-16

Astronomy and Astrophysics

Astrophysics

45

Background Radiation, Diffuse Radiation, Far Ultraviolet Radiation, Galaxies, Ultraviolet Spectra, Astronomical Models, Brightness Distribution, Galactic Evolution, Morphology, Red Shift

Scientific paper

We have used galaxy counts obtained at 2000 A down to a magnitude of 18.5 to calculate the ultraviolet integrated light of galaxies. The calculation is based on models developed to interpret the galaxy counts. Because of various sources of uncertainty, the extrapolated values lie in the range 40 - 130 photons/sq cm/s/A/sr. This extrapolated intensity is comparable to the extragalactic ultraviolet background estimated from direct background measurements, demonstrating that the integrated light of galaxies must be a significant contributor to the extragalactic ultraviolet background.

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