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arXiv:astro-ph/0011359 (astro-ph)
[Submitted on 20 Nov 2000]

Title:The Optical Extragalactic Background Light from Resolved Galaxies

Authors:Lucia Pozzetti, Piero Madau
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Abstract: We discuss the ultraviolet to near-IR galaxy counts from the deepest imaging surveys, including the northern and southern Hubble Deep Fields. The logarithmic slope of the galaxy number-magnitude relation is flatter than 0.4 in all seven UBVIJHK optical bandpasses at faint magnitudes, i.e. the light from resolved galaxies has converged from the UV to the near-IR. Most of the galaxy contribution to the extragalactic background light (EBL) comes from relatively bright, low-redshift objects (50% at V_AB<21 and 90% at V_AB<25.5). We find a lower limit to the surface brightness of the optical EBL of about 15 nW/m^2/sterad, comparable to the intensity of the far-IR background from COBE data. Diffuse light, lost because of surface brightness selection effects, may add substantially to the EBL.
Comments: 15 pages, 15 figures. Invited talk at IAU Symposium 204, "The Extragalactic Infrared Background and its Cosmological Implications", Manchester, August 2000, eds. this http URL and this http URL
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0011359
  (or arXiv:astro-ph/0011359v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0011359

Submission history

From: Lucia Pozzetti [view email]
[v1] Mon, 20 Nov 2000 11:45:34 UTC (88 KB)
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