J/ApJ/780/34ivo://CDS.VizieR/J/ApJ/780/34doi:10.26093/cds/vizier.17800034CDSLundgren B.F.van Dokkum P.Franx M.Labbe I.Trenti M.Bouwens R.,Gonzalez V.Illingworth G.Magee D.Oesch P.Stiavelli M.2017-06-13T11:08:36Z2015-01-28T15:01:07ZCDS support team

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

cds-question@unistra.frgalaxiescatalogshst-photometryinfrared-photometryredshiftedWe present an analysis of an H_160_-selected photometric catalog of galaxies in the Hubble Ultra-Deep Field, using imaging from the WFC3/IR camera on the Hubble Space Telescope in combination with archival ultraviolet, optical, and near-infrared imaging. Using these data, we measure the spectral energy distributions of ~1500 galaxies to a limiting H_160_ magnitude of 27.8, from which we fit photometric redshifts and stellar population estimates for all galaxies with well-determined Spitzer IRAC fluxes, allowing for the determination of the cumulative mass function within the range 1<z<6. By selecting samples of galaxies at a constant cumulative number density, we are able to explore the coevolution of stellar masses and star formation rates (SFRs) for progenitor galaxies and their descendants from z~6. We find a steady increase in the SFRs of galaxies at constant number density from z~6 to z~3, accompanied by gradually declining specific star formation rates (sSFRs) during this same period. The peak epoch of star formation is also found to shift to later times for galaxies with increasing number densities, in agreement with the expectations from cosmic downsizing. The observed SFRs can fully account for the mass growth to z~2 among galaxies with cumulative number densities greater than 10^-3.5^Mpc^-3^. For galaxies with a lower constant number density (higher mean mass), we find the observed stellar masses are ~three times greater than that which may be accounted for by the observed star formation alone at late times, implying that growth from mergers plays an important role at z<2. We additionally observe a decreasing sSFR, equivalent to approximately one order of magnitude, from z~6 to z~2 among galaxies with number densities less than 10^-3.5^Mpc^3^, along with significant evidence that at any redshift the sSFR is higher for galaxies at higher number density. The combination of these findings can qualitatively explain the previous findings of a specific star formation rate plateau at high redshift. Tracing the evolution of the fraction of quiescent galaxies for samples matched in cumulative number density over this redshift range, we find no unambiguous examples of quiescent galaxies at z>4.2014ApJ...780...34Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/780/34CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)II/258 : Hubble Ultra Deep Field Catalog (UDF) (STScI, 2004)J/ApJ/735/86 : NEWFIRM MBS: photometric catalogs (Whitaker+, 2011)J/AJ/135/1624 : PEARS emission-line galaxies (Straughn+, 2008)J/ApJ/682/985 : FIREWORKS photometry of GOODS CDF-S (Wuyts+, 2008)J/ApJ/655/51 : HDFS IRAC observations of 2<z<3.5 galaxies (Wuyts+, 2007)J/AJ/132/1729 : Hubble Ultra Deep Field BVI-dropout sources (Beckwith+, 2006)J/AJ/125/1107 : Ultra-deep near-IR observation in HDF-S (Labbe+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/780/34https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/780/34http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/780/34https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/780/34https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/780/34http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/780/34GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/780/34/table3 (Photometric catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/780/34/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/780/34/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/780/34/table3?GETtext/xml+votable180.050000true53.16120889-27.808133060.0055555555555555566/359353.9193497546148093e-20 5.522628211767129e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/780/34?format=asciiOpticalInfrareddefaultJ/ApJ/780/34/table3Photometric catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxy[1/1635] Unique object number (ID)meta.id;meta.mainintprimarySU38VLT/VIMOS U38 band flux density (FU38) (1)0.36uJyphot.flux.density;em.opt.Ufloate_SU38Error in SU38 (eFU38) (1)0.36uJystat.errorfloatSF435WHST/ACS F435W band flux density (FF1) (1)0.36uJyphot.flux.density;em.opt.Bfloate_SF435WError in SF435W (eFF1) (1)0.36uJystat.errorfloatSF606WHST/ACS F606W band flux density (FF4) (1)0.36uJyphot.flux.density;em.opt.Rfloate_SF606WError in SF606W (eFF4) (1)0.36uJystat.errorfloatSF775WHST/ACS F775W band flux density (FF6) (1)0.36uJyphot.flux.density;em.opt.Ifloate_SF775WError in SF775W (eFF6) (1)0.36uJystat.errorfloatSF850LPHST/ACS F850LP band flux density (FF7) (1)0.36uJyphot.flux.density;em.opt.Ifloate_SF850LPError in SF850LP (eFF7) (1)0.36uJystat.errorfloatSF105WHST/WFC3 F105W band flux density (FF202) (1)0.36uJyphot.flux.density;em.UV.100-200nmfloate_SF105WError in SF105W (eFF202) (1)0.36uJystat.errorfloatSF125WHST/WFC3 F125W band flux density (FF203) (1)0.36uJyphot.flux.density;em.IR.Jfloate_SF125WError in SF125W (eFF203) (1)0.36uJystat.errorfloatSF160WHST/WFC3 F160W band flux density (FF205) (1)0.36uJyphot.flux.density;em.IR.Hfloate_SF160WError in SF160W (eFF205) (1)0.36uJystat.errorfloatSKs?=-99999 ISAAC/PANIC Ks band flux density (ISAAC=Infrared Spectrometer and Array Camera) (FF37) (1)0.36uJyphot.mag;em.IR.Kdoublenullablee_SKs?=-99999.0000 Error in SKs (eFF37) (1)0.36uJystat.errordoublenullableS3.6?=-99999 Spitzer/IRAC 3.6{mu}m band flux density (FF18) (1)0.36uJyphot.flux.density;em.IR.3-4umdoublenullablee_S3.6?=-99999.0000 Error in S3.6 (eFF18) (1)0.36uJystat.errordoublenullableS4.5?=-99999.0000 Spitzer/IRAC 4.5{mu}m band flux density (FF19) (1)0.36uJyphot.mag;em.IR.4-8umdoublenullablee_S4.5?=-99999.0000 Error in S4.5 (eFF19) (1)0.36uJystat.errordoublenullableRAJ2000Right Acsension in decimal degrees (J2000) (R.A.)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (decl)degpos.eq.dec;meta.mainUDFUDF-z and UDF-i sources within 0..5'' (cat. II/258)meta.ref.urlintnullableXpixX image pixel coordinatepixpos.cartesian.xfloatYpixY image pixel coordinatepixpos.cartesian.yfloatBlend[4/7] SExtractor blend flag (BFlag) (2)meta.code.errorintWeight[0/1] Weight of the F160W exposure (3)stat.weight;phys.atmol.weightfloatRad[4/56] SExtractor F160W auto aperture radius (aprad) (2)pixstat.fit.paramfloatCorr[1/1.16] Factor of aperture correction to total (apcor)instr.paramfloatzsp[0.1/5.5]?=-99 Previous spectroscopic redshift (zspec) (4)src.redshiftfloatnullablezph[0.1/3.5]?=-99 Previous best photometric redshift (zph) (5)src.redshiftfloatnullablezpk[0.02/9.8] Peak of the EAZY redshift probability distribution P(z) (zpeak) (6)src.redshiftfloate_zpkLower 1{sigma} limit on zpk (ezpeak)stat.errorfloatE_zpkUpper 1{sigma} limit on zpk (Ezpeak)stat.error;stat.maxfloat