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dc.contributor.authorLindsay, S. N.
dc.contributor.authorJarvis, M. J.
dc.contributor.authorSantos, M. G.
dc.contributor.authorBrown, M. J. I.
dc.contributor.authorCroom, S. M.
dc.contributor.authorDriver, S. P.
dc.contributor.authorHopkins, A. M.
dc.contributor.authorLiske, J.
dc.contributor.authorLoveday, J.
dc.contributor.authorNorberg, P.
dc.contributor.authorRobotham, A. S. G.
dc.identifier.citationLindsay , S N , Jarvis , M J , Santos , M G , Brown , M J I , Croom , S M , Driver , S P , Hopkins , A M , Liske , J , Loveday , J , Norberg , P & Robotham , A S G 2014 , ' Galaxy and Mass Assembly : the evolution of bias in the radio source population to z ∼ 1.5 ' , Monthly Notices of the Royal Astronomical Society , vol. 440 , no. 2 , pp. 1527-1541 .
dc.description.abstractWe present a large-scale clustering analysis of radio galaxies in the Very Large Array Faint Images of the Radio Sky at Twenty-cm survey over the Galaxy and Mass Assembly (GAMA) survey area, limited to S1.4 GHz > 1 mJy with spectroscopic and photometric redshift limits up to r < 19.8 and <22 mag, respectively. For the GAMA spectroscopic matches, we present the redshift space and projected correlation functions, the latter of which yielding a correlation length r0 ∼ 8.2 h−1 Mpc and linear bias of ∼1.9 at z ∼ 0.34. Furthermore, we use the angular two-point correlation function w(θ) to determine spatial clustering properties at higher redshifts. We find r0 to increase from ∼6 to ∼14 h−1 Mpc between z = 0.3 and 1.55, with the corresponding bias increasing from ∼2 to ∼10 over the same range. Our results are consistent with the bias prescription implemented in the SKA Design Study simulations at low redshift, but exceed these predictions at z > 1. This is indicative of an increasing (rather than fixed) halo mass and/or active galactic nuclei fraction at higher redshifts or a larger typical halo mass for the more abundant Fanaroff and Riley Class I sources.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.subjectGalaxies: activeen
dc.subjectLarge-scale structure of Universeen
dc.subjectRadio continuum: galaxiesen
dc.subjectDigital sky surveyen
dc.subjectAngular-correlation functionen
dc.subjectBaryon acoustic-oscillationsen
dc.subjectSpatial correlation-functionen
dc.subject2-point correlation-functionen
dc.subjectActive galactic nucleien
dc.subjectQSO redshift surveyen
dc.subjectData release 7en
dc.subjectClustering propertiesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleGalaxy and Mass Assembly : the evolution of bias in the radio source population to z ∼ 1.5en
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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