Submm/mm Galaxy Counterpart Identification Using a Characteristic Density Distribution

dc.creatorItziar Aretxaga
dc.creatorDavid Hughes
dc.date2013-01-25
dc.date.accessioned2023-07-25T16:25:12Z
dc.date.available2023-07-25T16:25:12Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/2217
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7807398
dc.descriptionWe present a new submm/mm galaxy counterpart identification technique whichbuilds on the use of Spitzer IRAC colors as discriminators between likely counter-parts and the general IRAC galaxy population. Using 102 radio- and SMA-confirmedcounterparts to AzTEC sources across three fields (GOODS-N, GOODS-S, and COSMOS), we develop a non-parametric IRAC color-color characteristic density distribution (CDD), which, when combined with positional uncertainty information vialikelihood ratios, allows us to rank all potential IRAC counterparts around SMGsand calculate the significance of each ranking via the reliability factor. We reportall robust and tentative radio counterparts to SMGs, the first such list available forAzTEC/COSMOS, as well as the highest ranked IRAC counterparts for all AzTECSMGs in these fields as determined by our technique. We demonstrate that the technique is free of radio bias and thus applicable regardless of radio detections. For observations made with a moderate beamsize (∼18′′), this technique identifies ∼85 percent of SMG counterparts. For much larger beamsizes (≳30′′), we report identificationrates of 33-49 per cent. Using simulations, we demonstrate that this technique is animprovement over using positional information alone for observations with facilities such as AzTEC on the LMT and SCUBA-2 on JCMT.
dc.formatapplication/pdf
dc.languageeng
dc.publisherMonthly Notices of the Royal Astronomical Society
dc.relationcitation:Alberts, Stacey., et al., (2013). Submm/mm galaxy counterpart identification using a characteristic density distribution, Monthly Notices of the Royal Astronomical Society, Vol. 431(1):1-30
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Inspec/Submillimetre: galaxies
dc.subjectinfo:eu-repo/classification/Inspec/Radio continuum: galaxies
dc.subjectinfo:eu-repo/classification/Inspec/Infrared: galaxies
dc.subjectinfo:eu-repo/classification/Inspec/Galaxies: high redshift
dc.subjectinfo:eu-repo/classification/Inspec/Techniques: photometric
dc.subjectinfo:eu-repo/classification/Inspec/Methods: data analysis
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/2105
dc.titleSubmm/mm Galaxy Counterpart Identification Using a Characteristic Density Distribution
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


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