The scuba half degree extragalactic survey – III. Identification of radio and mid-infrared counterparts to submillimetre galaxies

dc.creatorRob Ivison
dc.creatorThomas Greve
dc.creatorJAMES DUNLOP
dc.creatorITZIAR ARETXAGA MENDEZ
dc.creatorDavid Hughes
dc.date2007-02-20
dc.date.accessioned2023-07-25T16:22:32Z
dc.date.available2023-07-25T16:22:32Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/874
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7806080
dc.descriptionDetermining an accurate position for a submillimetre (submm) galaxy (SMG) is the crucial step that enables us to move from the basic properties of an SMG sample – source counts and 2D clustering – to an assessment of their detailed, multiwavelength properties, their contribution to the history of cosmic star formation and their links with present-day galaxy populations. In this paper, we identify robust radio and/or infrared (IR) counterparts, and hence accurate positions, for over two-thirds of the SCUBA HAlf-Degree Extragalactic Survey (SHADES) Source Catalogue, presenting optical, 24-μm and radio images of each SMG. Observed trends in identification rate have given no strong rationale for pruning the sample. Uncertainties in submm position are found to be consistent with theoretical expectations, with no evidence for significant additional sources of error. Employing the submm/radio redshift indicator, via a parametrization appropriate for radio-identified SMGs with spectroscopic redshifts, yields a median redshift of 2.8 for the radio-identified subset of SHADES, somewhat higher than the median spectroscopic redshift. We present a diagnostic colour–colour plot, exploiting Spitzer photometry, in which we identify regions commensurate with SMGs at very high redshift. Finally, we find that significantly more SMGs have multiple robust counterparts than would be expected by chance, indicative of physical associations. These multiple systems are most common amongst the brightest SMGs and are typically separated by 2–6 arcsec, at z∼ 2, consistent with early bursts seen in merger simulations.
dc.formatapplication/pdf
dc.languageeng
dc.publisherMonthly Notices of the Royal Astronomical Society
dc.relationcitation:R. J. Ivison
dc.relationcitation:T. R. Greve
dc.relationcitation:J. S. Dunlop
dc.relationcitation:J. A. Peacock
dc.relationcitation:I. Aretxaga
dc.relationcitation:D. H. Hughes
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Galaxias/Galaxies
dc.subjectinfo:eu-repo/classification/Starburst - galaxias/Starburst – galaxies
dc.subjectinfo:eu-repo/classification/Formación - cosmología/Formation – cosmology
dc.subjectinfo:eu-repo/classification/Observaciones - cosmología/Observations – cosmology
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/21
dc.subjectinfo:eu-repo/classification/cti/2105
dc.subjectinfo:eu-repo/classification/cti/220209
dc.subjectinfo:eu-repo/classification/cti/220209
dc.titleThe scuba half degree extragalactic survey – III. Identification of radio and mid-infrared counterparts to submillimetre galaxies
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


Este ítem pertenece a la siguiente institución