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Spectrum and Origin of the Extragalactic Optical Background Radiation

Published online by Cambridge University Press:  08 February 2017

J. Anthony Tyson
J. Anthony Tyson*
Affiliation:
AT&T Bell Laboratories Murray Hill, NJ 07974 USA

Abstract

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Ultra-deep CCD surveys to 29 mag from .32 to .9 μ wavelength reveal an isotropic population of very blue galaxies. There are over 150,000 of these objects per square degree per magnitude. Saturation of their number density at 27 mag indicates that most of the optical light from this population has been detected. The resulting extragalactic background radiation from the UV to the near-IR due to this population of objects is shown. Gravitational lens and Lyman-break observations show that the redshift of galaxies fainter than 24 mag is in the range 1–3. Small-scale dark lane structures may be intergalactic dust clouds or tunnels through the luminous galaxy distribution.

Type
IV. Extragalactic Background Radiation and Cosmology
Information
Symposium - International Astronomical Union , Volume 139: The Galactic and Extragalactic Background Radiation , 1990 , pp. 245 - 255
Copyright
Copyright © Kluwer 1990 

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