J/ApJ/814/95ivo://CDS.VizieR/J/ApJ/814/95doi:10.26093/cds/vizier.18140095CDSFinkelstein S.L.Song M.Behroozi P.Somerville R.S.Papovich C.,Milosavljevic M.Dekel A.Narayanan D.Ashby M.L.N.Cooray A.,Fazio G.G.Ferguson H.C.Koekemoer A.M.Salmon B.Willner S.P.2017-09-05T14:45:03Z2016-03-24T08:12:28ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsredshiftedultraviolet-astronomyRecent observations have shown that the characteristic luminosity of the rest-frame ultraviolet (UV) luminosity function does not significantly evolve at 4<z<7 and is approximately M_UV_^*^~21. We investigate this apparent non-evolution by examining a sample of 173 bright, M_UV_<-21 galaxies at z=4-7, analyzing their stellar populations and host halo masses. Including deep Spitzer/IRAC imaging to constrain the rest-frame optical light, we find that M_UV_^*^ galaxies at z=4-7 have similar stellar masses of log(M/M_{sun}_)=9.6-9.9 and are thus relatively massive for these high redshifts. However, bright galaxies at z=4-7 are less massive and have younger inferred ages than similarly bright galaxies at z=2-3, even though the two populations have similar star formation rates and levels of dust attenuation for a fixed dust-attenuation curve. Matching the abundances of these bright z=4-7 galaxies to halo mass functions from the Bolshoi {Lambda}CDM simulation implies that the typical halo masses in ~M_UV_^*^ galaxies decrease from log(M_h_/M_{sun}_)=11.9 at z=4 to log(M_h_/M_{sun}_)=11.4 at z=7. Thus, although we are studying galaxies at a similar stellar mass across multiple redshifts, these galaxies live in lower mass halos at higher redshift. The stellar baryon fraction in ~M_UV_^*^ galaxies in units of the cosmic mean {Omega}_b_/{Omega}_m_ rises from 5.1% at z=4 to 11.7% at z=7; this evolution is significant at the ~3{sigma} level. This rise does not agree with simple expectations of how galaxies grow, and implies that some effect, perhaps a diminishing efficiency of feedback, is allowing a higher fraction of available baryons to be converted into stars at high redshifts.2015ApJ...814...95Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/814/95CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)J/ApJ/810/71 : UV mag of candidate galaxies at 3~<z~<8.5 (Finkelstein+, 2015)J/ApJS/218/33 : Spitzer-CANDELS catalog within 5 deep fields (Ashby+, 2015)J/ApJ/803/34 : z~4-10 galaxies from HST legacy fields (Bouwens+, 2015)J/MNRAS/440/2810 : Galaxy luminosity function at z =~ 7 (Bowler+, 2014)J/MNRAS/436/1919 : SCUBA observations of COSMOS galaxies (Casey+, 2013)J/MNRAS/432/2696 : Galaxy luminosity function at z = 7-9 (McLure+, 2013)J/ApJ/769/80 : Spitzer/IRAC observations of five deep fields (Ashby+, 2013)J/ApJ/756/164 : UV galaxies in CANDELS from z=8 to z=4 (Finkelstein+, 2012)J/ApJ/754/83 : UV continuum for z~4-7 star-forming galaxies (Bouwens+, 2012)J/ApJ/653/1004 : Galaxies at 1.4<~z<~3.0 in GOODS-North Field (Reddy+, 2006)J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/814/95https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/814/95http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/814/95https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/814/95https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/814/95http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/814/95GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/814/95/highz (Stellar populations of bright galaxies at z=4, 5, 6 and 7 (tables 3-6))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/814/95/highz?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/814/95/highz?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/814/95/highz?GETtext/xml+votable180.050000true53.09684-27.866073890.0055555555555555566/11252 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/814/95?format=asciiOpticalUVdefaultJ/ApJ/814/95/highzStellar populations of bright galaxies at z=4, 5, 6 and 7 (tables 3-6)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGalaxy identifier (1)meta.id;meta.maincharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainz[3.5/7.7] Redshiftsrc.redshiftfloatb_z[0.6/7.5] Minimum redshiftsrc.redshift;stat.minfloatB_z[3.6/7.9] Maximum redshiftsrc.redshift;stat.maxfloatlogM*[8.7/11.3] Log of stellar masslog(solMass)phys.massfloatb_logM*[6.5/11.2] Minimum logM*log(solMass)phys.mass;stat.minfloatB_logM*[9.2/11.4] Maximum logM*log(solMass)phys.mass;stat.maxfloatAge[10/1015] AgeMyrtime.ageintb_Age[10/904] Minimum AgeMyrtime.age;stat.minintB_Age[10/1015] Maximum AgeMyrtime.age;stat.maxintE(B-V)[0/0.4] B-V color excessmagphot.color.excessfloatb_E(B-V)[0/0.4] Minimum E(B-V)magphot.color;stat.minfloatB_E(B-V)[0.02/0.7] Maximum E(B-V)magphot.color;stat.maxfloatSFR[12/1066] Star formation ratesolMass/yrphys.SFRintb_SFR[0/863] Minimum SFRsolMass/yrphys.SFR;stat.minintB_SFR[15/1186] Maximum SFRsolMass/yrphys.SFR;stat.maxintSimbadSimbad column added by the CDSmeta.ref.urlchar