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arXiv:astro-ph/0405219 (astro-ph)
[Submitted on 12 May 2004 (v1), last revised 10 Jun 2004 (this version, v2)]

Title:Possible Detection of Cosmological Reionization Sources

Authors:M. Stiavelli, S.M. Fall, N. Panagia
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Abstract: We compare the available catalogs of $z\approx6$ galaxies in the Hubble Ultra-Deep Field (UDF) and in the Great Observatories Origins Deep Survey (GOODS) with the expected properties of the sources of cosmological reionization from our previous theoretical study. Our approach is based on the mean surface brightness of the sources required for reionization and depends on relatively few undetermined parameters. We find that the observed mean surface brightness of galaxies at $z \approx 6$ is sufficient for reionization, provided that the sources are composed of hot metal-free or metal-poor stars, regardless of whether reionization occurs over a short or long interval of redshift. The broad agreement between the new observations and our predictions suggests that we may have detected the sources responsible for some or even all of the reionization of hydrogen.
Comments: ApJL in press. Slightly revised version (mostly wording and some extra references). Original version submitted on 21-March-2004. 10 pages, 1 figure
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0405219
  (or arXiv:astro-ph/0405219v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0405219
Journal reference: Astrophys.J. 610 (2004) L1-L4
Related DOI: https://doi.org/10.1086/423198

Submission history

From: Massimo Stiavelli [view email]
[v1] Wed, 12 May 2004 03:07:42 UTC (124 KB)
[v2] Thu, 10 Jun 2004 15:31:35 UTC (124 KB)
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