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dc.contributor.authorDuncan, K. J.
dc.contributor.authorKondapally, R.
dc.contributor.authorBrown, M. J. I.
dc.contributor.authorBest, P. N.
dc.contributor.authorRöttgering, H. J. A.
dc.contributor.authorBondi, M.
dc.contributor.authorBowler, R. A. A.
dc.contributor.authorCochrane, R. K.
dc.contributor.authorGürkan, G.
dc.contributor.authorHardcastle, M. J.
dc.contributor.authorJarvis, M. J.
dc.contributor.authorKunert-Bajraszewska, M.
dc.contributor.authorLeslie, S. K.
dc.contributor.authorMałek, K.
dc.contributor.authorMorabito, L. K.
dc.contributor.authorO'Sullivan, S. P.
dc.contributor.authorPrandoni, I.
dc.contributor.authorSabater, J.
dc.contributor.authorShimwell, T. W.
dc.contributor.authorSmith, D. J. B.
dc.contributor.authorWang, L.
dc.contributor.authorWołowska, A.
dc.date.accessioned2021-05-05T16:15:20Z
dc.date.available2021-05-05T16:15:20Z
dc.date.issued2021-04-07
dc.identifier.citationDuncan , K J , Kondapally , R , Brown , M J I , Best , P N , Röttgering , H J A , Bondi , M , Bowler , R A A , Cochrane , R K , Gürkan , G , Hardcastle , M J , Jarvis , M J , Kunert-Bajraszewska , M , Leslie , S K , Małek , K , Morabito , L K , O'Sullivan , S P , Prandoni , I , Sabater , J , Shimwell , T W , Smith , D J B , Wang , L & Wołowska , A 2021 , ' The LOFAR Two-metre Sky Survey Deep Fields: Data release 1. IV. Photometric redshifts and stellar masses ' , Astronomy & Astrophysics , vol. 648 , A4 . https://doi.org/10.1051/0004-6361/202038809
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 23015479
dc.identifier.otherPURE UUID: 54022d19-0259-4668-adad-8ca0914154d2
dc.identifier.otherArXiv: http://arxiv.org/abs/2011.08204v1
dc.identifier.otherORCID: /0000-0001-9708-253X/work/93471037
dc.identifier.otherScopus: 85103891459
dc.identifier.urihttp://hdl.handle.net/2299/24402
dc.description23 pages, 14 figures. Accepted for publication in A&A. This paper is part of the 1st data release of the LoTSS Deep Fields - Electronic data catalogues will be made available on journal publication
dc.description.abstractThe Low Frequency Array (LOFAR) Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey split across multiple tiers over the northern sky. The first LoTSS Deep Fields data release consists of deep radio continuum imaging at 150 MHz of the Bo\"{o}tes, European Large Area Infrared Space Observatory Survey-North 1 (ELAIS-N1), and Lockman Hole fields, down to rms sensitivities of $\sim$32, 20, and 22 $\mu$Jy beam$^{-1}$, respectively. In this paper we present consistent photometric redshift (photo-$z$) estimates for the optical source catalogues in all three fields - totalling over 7 million sources ($\sim5$ million after limiting to regions with the best photometric coverage). Our photo-$z$ estimation uses a hybrid methodology that combines template fitting and machine learning and is optimised to produce the best possible performance for the radio continuum selected sources and the wider optical source population. Comparing our results with spectroscopic redshift samples, we find a robust scatter ranging from 1.6 to 2% for galaxies and 6.4 to 7% for identified optical, infrared, or X-ray selected active galactic nuclei (AGN). Our estimated outlier fractions ($\left | z_{\text{phot}} - z_{\text{spec}} \right | / (1+z_{\text{spec}}) > 0.15$) for the corresponding subsets range from 1.5 to 1.8% and 18 to 22%, respectively. Replicating trends seen in analyses of previous wide-area radio surveys, we find no strong trend in photo-$z$ quality as a function of radio luminosity for a fixed redshift. We exploit the broad wavelength coverage available within each field to produce galaxy stellar mass estimates for all optical sources at $z <1.5$. Stellar mass functions derived for each field are used to validate our mass estimates, with the resulting estimates in good agreement between each field and with published results from the literature.en
dc.format.extent21
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.subjectastro-ph.GA
dc.subjectastro-ph.IM
dc.titleThe LOFAR Two-metre Sky Survey Deep Fields: Data release 1. IV. Photometric redshifts and stellar massesen
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionSPECS Deans Group
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/202038809
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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