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2013MNRAS.436.1084M - Mon. Not. R. Astron. Soc., 436, 1084-1095 (2013/December-1)
Evolution of faint radio sources in the VIDEO-XMM3 field.
McALPINE K., JARVIS M.J. and BONFIELD D.G.
Abstract (from CDS):
In this paper, we present a new investigation of the evolution of faint radio sources out to z ∼ 2.5. We combine a 1 square degree Very Large Array radio survey, complete to a depth of 100 µJy, with accurate 10 band photometric redshifts from the following surveys: Visible and Infrared Survey Telescope for Astronomy Deep Extragalactic Observations and Canada-France-Hawaii Telescope Legacy Survey. The results indicate that the radio population experiences mild positive evolution out to z ∼ 1.2 increasing their space density by a factor of ∼ 3, consistent with results of several previous studies. Beyond z = 1.2, there is evidence of a slowing down of this evolution. Star-forming galaxies drive the more rapid evolution at low redshifts, z < 1.2, while more slowly evolving AGN populations dominate at higher redshifts resulting in a decline in the evolution of the radio luminosity function at z > 1.2. The evolution is best fitted by pure luminosity evolution with star-forming galaxies evolving as (1 + z)2.47±0.12 and AGN as (1 + z)1.18±0.21.
Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s): galaxies: active - galaxies: evolution - radio continuum: galaxies
Simbad objects: 3
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