J/ApJ/813/78ivo://CDS.VizieR/J/ApJ/813/78doi:10.26093/cds/vizier.18130078CDSFinkelstein K.D.Finkelstein S.L.Tilvi V.Malhotra S.Rhoads J.E.,Grogin N.A.Pirzkal N.Dey A.Jannuzi B.T.Mobasher B.Pakzad S.,Salmon B.Wang J.2018-05-14T06:11:49Z2017-10-16T12:09:23ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-sourcesinfrared-photometryvisible-astronomyphotometrystellar-massesstellar-ageschemical-abundancesextinctionWe present the results from a stellar population modeling analysis of a sample of 162 z=4.5 and 14 z=5.7 Ly{alpha} emitting galaxies (LAEs) in the Bootes field, using deep Spitzer/IRAC data at 3.6 and 4.5 {mu}m from the Spitzer Ly{alpha} Survey, along with Hubble Space Telescope NICMOS and WFC3 imaging at 1.1 and 1.6 {mu}m for a subset of the LAEs. This represents one of the largest samples of high-redshift LAEs imaged with Spitzer IRAC. We find that 30/162 (19%) of the z=4.5 LAEs and 9/14 (64%) of the z=5.7 LAEs are detected at >=3{sigma} in at least one IRAC band. Individual z=4.5 IRAC-detected LAEs have a large range of stellar mass, from 5x10^8^-10^11^ M_{sun}_. One-third of the IRAC-detected LAEs have older stellar population ages of 100 Myr^-1^ Gyr, while the remainder have ages <100 Myr. A stacking analysis of IRAC-undetected LAEs shows this population to be primarily low mass (8-20x10^8^ M_{sun}_) and young (64-570 Myr). We find a correlation between stellar mass and the dust-corrected ultraviolet-based star formation rate (SFR) similar to that at lower redshifts, in that higher mass galaxies exhibit higher SFRs. However, the z=4.5 LAE correlation is elevated 4-5 times in SFR compared to continuum-selected galaxies at similar redshifts. The exception is the most massive LAEs which have SFRs similar to galaxies at lower redshifts suggesting that they may represent a different population of galaxies than the traditional lower-mass LAEs, perhaps with a different mechanism promoting Ly{alpha} photon escape.2015ApJ...813...78Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/813/78CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/671/1227 : Ly{alpha} galaxies at z~4.5 (Dawson+, 2007)J/ApJS/172/523 : COSMOS field Ly{alpha} emitters at z~5.7 (Murayama+, 2007)J/ApJ/706/762 : LAEs at z~4.5 in the LALA Cetus field (Wang+, 2009)J/ApJ/810/107 : Lyman break galaxies and LAEs HST photometry (Mostardi+, 2015)J/ApJ/817/119 : Spitzer/IRAC variability survey of Bootes fieldhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/813/78https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/813/78http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/813/78https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/813/78https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/813/78http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/813/78GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/813/78/table2 (LAE z~4.5 - Flux Measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/813/78/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/813/78/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/813/78/table2?GETtext/xml+votable180.050000true216.6186235.63576110.005555555555555556Cone search capability for table J/ApJ/813/78/table3 (LAE z~5.7 - Flux Measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/813/78/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/813/78/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/813/78/table3?GETtext/xml+votable180.050000true216.6963835.60351110.0055555555555555566/10515 10518 10521-2.439715709817298e-18 2.903888696868909e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/813/78?format=asciiInfraredOpticaldefaultJ/ApJ/813/78/table4z=4.5 IRAC Detected LAEs - Model SED Fitting ResultsID[3/231] Source identifiermeta.id;meta.mainintn_ID[c nc] Note on ID (G1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintchi2Reduced {chi}^2^ of best-fitting modelstat.param;meta.modelledfloatMassBest-fit mass1e+08solMassphys.mass;meta.modelledfloatb_Mass[] Mass 68% confidence interval, lower value1e+08solMassphys.massfloatB_Mass[] Mass 68% confidence interval, upper value1e+08solMassphys.massfloatAgeBest-fit ageMyrtime.age;meta.modelledintb_AgeAge 68% confidence interval, lower valueMyrtime.age;stat.fit.paramintB_Age[] Age 68% confidence interval, upper valueMyrtime.age;stat.fit.paramintE(B-V)Best-fit dust extinctionmagphot.color.excessfloatb_E(B-V)[] Extinction 68% confidence interval, lower valuemagphys.absorptionfloatB_E(B-V)[] Extinction 68% confidence interval, upper valuemagphys.absorptionfloatZBest-fit metallicitylog(Sun)phys.abund.Z;meta.modelledfloatb_ZMetallicity 68% confidence interval, lower valuelog(Sun)phys.abund.ZfloatB_Z[] Metallicity 68% confidence interval, upper valuelog(Sun)phys.abund.ZfloatJ/ApJ/813/78/table2LAE z~4.5 - Flux Measurementse_F4.5? Uncertainty in F4.5uJystat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3/231] Source identifiermeta.id;meta.mainintn_ID[c nc] Note on ID (G1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainFNBNarrow Band flux density (1)uJyphot.flux.density;em.IRfloate_FNBUncertainty in FNBuJystat.errorfloatFRMOSAIC R band flux densityuJyphot.flux.density;em.opt.Rfloate_FRUncertainty in FRuJystat.errorfloatFIMOSAIC I band flux densityuJyphot.flux.density;em.opt.Ifloate_FIUncertainty in FIuJystat.errorfloatFzMOSAIC z' band flux densityuJyphot.flux.density;em.IRfloate_FzUncertainty in FzuJystat.errorfloatF110W? HST/WFC3 F110W band flux densityuJyphot.flux.density;em.IR.Jfloatnullablee_F110W? Uncertainty in F110WuJystat.errorfloatnullableF160W? HST/WFC3 F160W band flux densityuJyphot.flux.density;em.IR.Hfloatnullablee_F160W? Uncertainty in F160WuJystat.errorfloatnullableF3.6? Spitzer/IRAC 3.6{mu}m flux densityuJyphot.mag;em.IR.3-4umfloatnullablee_F3.6? Uncertainty in F3.6uJystat.errorfloatnullableF4.5? Spitzer/IRAC 4.5{mu}m flux densityuJyphot.mag;em.IR.4-8umfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/813/78/table3LAE z~5.7 - Flux Measurementse_F110W? Uncertainty in F110WuJystat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3/231] Source identifiermeta.id;meta.mainintn_ID[c nc] Note on ID (G1)meta.notecharRAJ2000Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainFNBNarrow Band flux density (1)uJyphot.flux.density;em.IRfloate_FNBUncertainty in FNBuJystat.errorfloatFRMOSAIC R band flux densityuJyphot.flux.density;em.opt.Rfloate_FRUncertainty in FRuJystat.errorfloatFIMOSAIC I band flux densityuJyphot.flux.density;em.opt.Ifloate_FIUncertainty in FIuJystat.errorfloatFzMOSAIC z' band flux densityuJyphot.flux.density;em.IRfloate_FzUncertainty in FzuJystat.errorfloatF110W? HST/WFC3 F110W band flux densityuJyphot.flux.density;em.IR.JfloatnullableF160W? HST/WFC3 F160W band flux densityuJyphot.flux.density;em.IR.Hfloatnullablee_F160W? Uncertainty in F160WuJystat.errorfloatnullableF3.6? Spitzer/IRAC 3.6{mu}m flux densityuJyphot.mag;em.IR.3-4umfloatnullablee_F3.6? Uncertainty in F3.6uJystat.errorfloatnullableF4.5? Spitzer/IRAC 4.5{mu}m flux densityuJyphot.mag;em.IR.4-8umfloatnullablee_F4.5? Uncertainty in F4.5uJystat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/813/78/table5z=4.5 HST NIR Detected LAEs with IRAC Upper Limits - Model SED Fitting ResultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3/231] Source identifiermeta.id;meta.mainintn_ID[c nc] Note on ID (G1)meta.notecharchi2Reduced {chi}^2^ of best-fitting modelstat.param;meta.modelledfloatMassBest-fit mass1e+08solMassphys.mass;meta.modelledfloatb_Mass[] Mass 68% confidence interval, lower value1e+08solMassphys.massfloatB_Mass[] Mass 68% confidence interval, upper value1e+08solMassphys.massfloatAgeBest-fit ageMyrtime.age;meta.modelledintb_AgeAge 68% confidence interval, lower valueMyrtime.age;stat.fit.paramintB_Age[] Age 68% confidence interval, upper valueMyrtime.age;stat.fit.paramintE(B-V)Best-fit dust extinctionmagphot.color.excessfloatb_E(B-V)[] Extinction 68% confidence interval, lower valuemagphys.absorptionfloatB_E(B-V)[] Extinction 68% confidence interval, upper valuemagphys.absorptionfloatZBest-fit metallicitylog(Sun)phys.abund.Z;meta.modelledfloatb_ZMetallicity 68% confidence interval, lower valuelog(Sun)phys.abund.ZfloatB_Z[] Metallicity 68% confidence interval, upper valuelog(Sun)phys.abund.ZfloatJ/ApJ/813/78/table6z=5.7 IRAC Detected LAEs - Model SED Fitting ResultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[3/231] Source identifiermeta.id;meta.mainintn_ID[c nc] Note on ID (G1)meta.notecharchi2Reduced {chi}^2^ of best-fitting modelstat.param;meta.modelledfloatMassBest-fit mass1e+08solMassphys.mass;meta.modelledfloatb_Mass[] Mass 68% confidence interval, lower value1e+08solMassphys.massfloatB_Mass[] Mass 68% confidence interval, upper value1e+08solMassphys.massfloatAgeBest-fit ageMyrtime.age;meta.modelledintb_AgeAge 68% confidence interval, lower valueMyrtime.age;stat.fit.paramintB_Age[] Age 68% confidence interval, upper valueMyrtime.age;stat.fit.paramintE(B-V)Best-fit dust extinctionmagphot.color.excessfloatb_E(B-V)[] Extinction 68% confidence interval, lower valuemagphys.absorptionfloatB_E(B-V)[] Extinction 68% confidence interval, upper valuemagphys.absorptionfloatZBest-fit metallicitylog(Sun)phys.abund.Z;meta.modelledfloatb_ZMetallicity 68% confidence interval, lower valuelog(Sun)phys.abund.ZfloatB_Z[] Metallicity 68% confidence interval, upper valuelog(Sun)phys.abund.Zfloat