Evolution of faint radio sources in the VIDEO-XMM3 field

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dc.contributor.authorMcAlpine, K.
dc.contributor.authorJarvis, Matt
dc.contributor.authorBonfield, David G.
dc.date.accessioned2018-02-07T08:50:11Z
dc.date.available2018-02-07T08:50:11Z
dc.date.issued2013
dc.description.abstractIt has been speculated that low luminosity radio-loud AGN have the potential to serve as an important source of AGN feedback, and may be responsible for suppressing star-formation activity in massive elliptical galaxies at late times. As such the cosmic evolution of these sources is vitally important to understanding the significance of such AGN feedback processes and their influence on the global star-formation history of the universe. 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 VLA radio survey, complete to a depth of 100 μJy, with accurate 10 band photometric redshifts from the VIDEO and CFHTLS surveys. The results indicate that the radio population experiences mild positive evo- lution 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 fit 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.en_US
dc.description.accreditationWeb of Science
dc.identifier.citationMcAlpine, K. et al. Evolution of faint radio sources in the VIDEO-XMM3 field. Monthly Notices of the Royal Astronomical Society, 436(2): 1084 - 1095en_US
dc.identifier.issn0035-8711
dc.identifier.urihttp://dx.doi.org/10.1093/mnras/stt1638
dc.identifier.urihttp://hdl.handle.net/10566/3483
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherOUPen_US
dc.rightsThis is the pre-print version (from arXiv:1309.0358) of the article published online at: http://dx.doi.org/10.1093/mnras/stt1638
dc.status.ispeerreviewedTRUE
dc.subjectRadio continuumen_US
dc.subjectGalaxiesen_US
dc.subjectActive galaxiesen_US
dc.subjectEvolutionen_US
dc.titleEvolution of faint radio sources in the VIDEO-XMM3 fielden_US
dc.typeArticleen_US

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