J/MNRAS/495/3409ivo://CDS.VizieR/J/MNRAS/495/3409doi:10.26093/cds/vizier.74953409CDSSimpson J.M.Smail I.Dudzeviciute U.Matsuda Y.Hsieh B.-C.,Wang W.-H.Swinbank A.M.Stach S.M.An F.X.Birkin J.E.Ao Y.,Bunker A.J.Chapman S.C.Chen C.-C.Coppin K.E.K.Ikarashi S.,Ivison R.J.Mitsuhashi I.Saito T.Umehata H.Wang R.Zhao Y.2025-05-22T20:15:47Z2023-09-14T14:05:43ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiesmillimeter-astronomysubmillimeter-astronomyinterferometryastrometryastronomical-object-identificationWe present an ALMA study of the ~180 brightest sources in the SCUBA-2 850-{mu}m map of the COSMOS field from the S2COSMOS survey, as a pilot study for AS2COSMOS - a full survey of the ~1000 sources in this field. In this pilot study, we have obtained 870-{mu}m continuum maps of an essentially complete sample of the brightest 182 sub-millimetre sources (S_850{mu}m_>6.2mJy) in COSMOS. Our ALMA maps detect 260 sub-millimetre galaxies (SMGs) spanning a range in flux density of S_870{mu}m_=0.7-19.2mJy. We detect more than one SMG counterpart in 34+/-2 per cent of sub-millimetre sources, increasing to 53+/-8 per cent for SCUBA-2 sources brighter than S_850{mu}m_>12mJy. We estimate that approximately one-third of these SMG-SMG pairs are physically associated (with a higher rate for the brighter secondary SMGs, S_870{mu}m_>~3mJy), and illustrate this with the serendipitous detection of bright [CII] 157.74-{mu}m line emission in two SMGs, AS2COS 0001.1 and 0001.2 at z=4.63, associated with the highest significance single-dish source. Using our source catalogue, we construct the interferometric 870-{mu}m number counts at S_870{mu}m_>6.2mJy. We use the extensive archival data of this field to construct the multiwavelength spectral energy distribution of each AS2COSMOS SMG, and subsequently model this emission with MAGPHYS to estimate their photometric redshifts. We find a median photometric redshift for the S_870{mu}m_>6.2mJy AS2COSMOS sample of z=2.87+/-0.08, and clear evidence for an increase in the median redshift with 870-{mu}m flux density suggesting strong evolution in the bright end of the 870-{mu}m luminosity function.2020MNRAS.495.3409Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/3409CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/3409https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/3409http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/3409https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/3409https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/3409http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/3409GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/3409/table1 (AS2COSMOS source catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/3409/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/3409/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/3409/table1?GETtext/xml+votable180.050000true150.0334952.43674810.0055555555555555565/6814 6/27245 27247https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/3409?format=asciiMillimeterdefaultJ/MNRAS/495/3409/table1AS2COSMOS source cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (AS2COSNNNN.N)meta.id;meta.maincharRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainSscuba2SCUBA-2 flux densitymJyphot.flux.density;em.mm.200-400GHzfloate_Sscuba2Lower error on Sscuba2mJystat.errorfloatE_Sscuba2Upper error on Sscuba2mJystat.error;stat.maxfloatRMS1{sigma} sensitivity of the non-primary-beam-corrected ALMA mapmJy/beaminstr.det.noisefloatBeammajBeam size, major axisarcsecphys.angSize.smajAxisfloatBeamminBeam size, minor axisarcsecphys.angSize.sminAxisfloatSNRSignal to noise ratiostat.snrfloatSALMATotal flux density, corrected for the ALMA primary beam responsemJyphot.flux.density;em.mm.200-400GHzfloate_SALMALower error on SALMAmJystat.errorfloatE_SALMAUpper error on SALMAmJystat.error;stat.maxfloatONameAlternative names (1)meta.idchar