dc.contributor.author | Lindsay, S. N. | |
dc.contributor.author | Jarvis, M.J. | |
dc.contributor.author | McAlpine, K. | |
dc.date.accessioned | 2014-08-28T09:00:48Z | |
dc.date.available | 2014-08-28T09:00:48Z | |
dc.date.issued | 2014-05-21 | |
dc.identifier.citation | Lindsay , S N , Jarvis , M J & McAlpine , K 2014 , ' Evolution in the bias of faint radio sources to z ~ 2.2 ' , Monthly Notices of the Royal Astronomical Society , vol. 440 , no. 3 , pp. 2322-2332 . https://doi.org/10.1093/mnras/stu453 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/2299/14400 | |
dc.description.abstract | Quantifying how the baryonic matter traces the underlying dark matter distribution is key to both understanding galaxy formation and our ability to constrain the cosmological model. Using the cross-correlation function of radio and near-infrared galaxies, we present a large-scale clustering analysis of radio galaxies to z ~ 2.2. We measure the angular auto-correlation function of Ks<23.5 galaxies in the VISTA Deep Extragalactic Observations (VIDEO-XMM3) field with photometric redshifts out to z = 4 using VIDEO and CFHTLS (Canada-France-Hawaii Telescope Legacy Survey) photometry in the near-infrared and optical. We then use the cross-correlation function of these sources with 766 radio sources at S1.4>90μJy to infer linear bias of radio galaxies in four redshift bins. We find that the bias evolves from b = 0.57 ± 0.06 at z ~ 0.3 to 8.55 ± 3.11 at z ~ 2.2. Furthermore, we separate the radio sources into subsamples to determine how the bias is dependent on the radio luminosity, and find a bias which is significantly higher than predicted by the simulations of Wilman et al., and consistent with the lower luminosity but more abundant FR-I population having a similar bias to the highly luminous but rare FR-IIs. Our results are suggestive of a higher mass, particularly for FR-I sources than assumed in simulations, especially towards higher redshift. | en |
dc.format.extent | 11 | |
dc.format.extent | 686636 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | Galaxies: active | |
dc.subject | Large-scale structure of Universe | |
dc.subject | Radio continuum: galaxies | |
dc.subject | Surveys | |
dc.subject | Space and Planetary Science | |
dc.subject | Astronomy and Astrophysics | |
dc.title | Evolution in the bias of faint radio sources to z ~ 2.2 | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1093/mnras/stu453 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |