The Phoenix Deep Survey: spectroscopic catalog

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dc.creatorAfonso, J.
dc.creatorGeorgakakis, A.
dc.creatorAlmeida, C.
dc.creatorHopkins, A. M.
dc.creatorCram, L. E.
dc.creatorMobasher, B.
dc.creatorSullivan, M.
dc.date2004-11-19
dc.date2005-05-06
dc.date.accessioned2026-07-07T12:16:24Z
dc.date.available2026-07-07T12:16:24Z
dc.descriptionThe Phoenix Deep Survey is a multi-wavelength survey based on deep 1.4 GHz radio imaging, reaching well into the sub-100 microJy level. One of the aims of this survey is to characterize the sub-mJy radio population, exploring its nature and evolution. In this paper we present the catalog and results of the spectroscopic observations aimed at characterizing the optically ``bright'' (R<~ 21.5 mag) counterparts of faint radio sources. Out of 371 sources with redshift determination, 21% have absorption lines only, 11% show AGN signatures, 32% are star-forming galaxies, 34% show narrow emission lines that do not allow detailed spectral classification (due to poor signal-to-noise ratio and/or lack of diagnostic emission lines) and the remaining 2% are identified with stars. For the star-forming galaxies with a Balmer decrement measurement we find a median extinction of A(Ha)=1.9 mag, higher than that of optically selected samples. This is a result of the radio selection, which is not biased against dusty systems. Using the available spectroscopic information, we estimate the radio luminosity function of star-forming galaxies in two independent redshift bins at z~0.1 and 0.3 respectively. We find direct evidence for strong luminosity evolution of these systems consistent with L(1.4 GHz) ~ (1+z)^(2.7).
dc.description39 pages, 12 figures. References added, and minor changes to reflect published version
dc.identifierhttps://arxiv.org/abs/astro-ph/0411578
dc.identifierhttp://arxiv.org/abs/astro-ph/0411578
dc.identifierAstrophys.J.624:135-154,2005
dc.identifierdoi:10.1086/428923
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211787
dc.subjectAstrophysics
dc.titleThe Phoenix Deep Survey: spectroscopic catalog
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