J/A+A/614/A33ivo://CDS.VizieR/J/A+A/614/A33doi:10.26093/cds/vizier.36140033CDSDonevski D.Buat V.Boone F.Pappalardo C.Bethermin M.Schreiber C.,Mazyed F.Alvarez-Marquez J.Duivenvoorden S.2020-10-07T14:49:57Z2018-11-15T15:37:03ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesmillimeter-astronomyphotometrysubmillimeter-astronomyContext. Over the last decade a large number of dusty star-forming galaxies has been discovered up to redshift z=2-3 and recent studies have attempted to push the highly confused Herschel SPIRE surveys beyond that distance. To search for z>=4 galaxies they often consider the sources with fluxes rising from 250{mu}m to 500{mu}m (so-called "500{mu}m-risers"). Herschel surveys offer a unique opportunity to efficiently select a large number of these rare objects, and thus gain insight into the prodigious star-forming activity that takes place in the very distant Universe. Aims. We aim to implement a novel method to obtain a statistical sample of 500{mu}m-risers and fully evaluate our selection inspecting different models of galaxy evolution. Methods. We consider one of the largest and deepest Herschel surveys, the Herschel Virgo Cluster Survey. We develop a novel selection algorithm which links the source extraction and spectral energy distribution fitting. To fully quantify selection biases we make end-to-end simulations including clustering and lensing. Results. We select 133 500{mu}m-risers over 55deg^2^, imposing the criteria: S_500_>S_350_>S_250_, S_250_>13.2mJy and S_500_>30mJy. Differential number counts are in fairly good agreement with models, displaying a better match than other existing samples. The estimated fraction of strongly lensed sources is 24_+6_^-5^% based on models.Conclusions. We present the faintest sample of 500{mu}m-risers down to S_250_=13.2mJy. We show that noise and strong lensing have an important impact on measured counts and redshift distribution of selected sources. We estimate the flux-corrected star formation rate density at 4<z<5 with the 500{mu}m-risers and find it to be close to the total value measured in far-infrared. This indicates that colour selection is not a limiting effect to search for the most massive, dusty z>4 sources.2018A&A...614A..33Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/614/A33CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/614/A33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/614/A33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/614/A33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/614/A33https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/614/A33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/614/A33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/614/A33/tabled1 (Selected sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/614/A33/tabled1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/614/A33/tabled1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/614/A33/tabled1?GETtext/xml+votable180.050000true181.812791714.88830560.0055555555555555565/6917 6934 7008 6/26299 26301-26302 26344 26346-26347 26351 26362 27665 27676 27712-27713 27716-27718 27720-27721 27725 27727-27728 27730-27731 27734 27740-27741 27749 27760-27761 27763 27765-27767 27769 27771 27774 27856-27857 27859 27861 27865 27867-27868 27870 27912 27936 27938-27939 27944-27945 280403.972892068905477e-22 7.945784137810954e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/614/A33?format=asciiInfraredMillimeterdefaultJ/A+A/614/A33/tabled1Selected sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/133] Sequential numbermeta.recordintNameSource name (HVS JHHMMSS+DDMM.s)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainS250SPIRE flux at 250ummJyphot.flux.density;em.mm.750-1500GHzfloate_S250rms uncertainty on S250 (1)mJystat.errorfloatS350SPIRE flux at 350ummJyphot.flux.density;em.mm.750-1500GHzfloate_S350rms uncertainty on S350 (1)mJystat.errorfloatS500SPIRE flux at 500ummJyphot.flux.density;em.mm.400-750GHzfloate_S500rms uncertainty on S250 (1)mJystat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlchar