J/ApJ/950/125ivo://CDS.VizieR/J/ApJ/950/125CDSMerida R.M.Perez-Gonzalez P.G.Sanchez-Blazquez P.,Garcia-Argumanez A.Annunziatella M.Costantin L.Lumbreras-Calle A.,Alcalde-Pampliega B.Barro G.Espino-Briones N.Koekemoer A.M.2025-09-05T08:42:54Z2025-09-05T09:39:45ZCDS support team

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

cds-question@unistra.frhst-photometryvisible-astronomyinfrared-astronomygalaxiescatalogsredshiftedtwo-color-diagramsextinctionchemical-abundancesWe investigate the star formation main sequence (MS; SFR-M*) down to 10^8-9^M_{sun}_ using a sample of 34061 newly discovered ultrafaint (27mag<~i<~30mag) galaxies at 1<z<3 detected in the GOODS-N field. Virtually none of these galaxies are contained in previous public catalogs, effectively doubling the number of known sources in the field. The sample was constructed by stacking the optical broadband observations taken by the HST/GOODS-CANDELS surveys, as well as the 25 ultradeep medium-band images gathered by the GTC/SHARDS project. Our sources are faint (average observed magnitudes <i>~28.2 and <H>~27.9mag), blue (UV slope <{beta}>~-1.9), star-forming (rest-frame colors <U-V>~0.10 and <V-J>~0.17mag) galaxies. These observational characteristics are identified with young (mass-weighted age <t_M-w_>~0.014Gyr) stellar populations subject to low attenuations (<A(V)>~0.30mag). Our sample allows us to probe the MS down to 10^8.0^M_{sun}_ at z=1 and 10^8.5^M_{sun}_ at z=3, around 0.6dex deeper than previous analyses. In the low-mass galaxy regime, we find an average value for the slope of 0.97 at 1<z<2 and 1.12 at 2<z<3. Nearly 60% of our sample presents stellar masses in the range 10^6-8^M_{sun}_ at 1<z<G 3. If the slope of the MS remained constant in this regime, the sources populating the low-mass tail of our sample would qualify as starburst galaxies.2023ApJ...950..125Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/950/125CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/261 : GOODS initial results (Giavalisco+, 2004)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)J/AJ/127/180 : The Hawaii Hubble Deep Field North (Capak+, 2004)J/ApJ/675/234 : Stellar mass functions for z<4 gal. (Perez-Gonzalez+, 2008)J/A+A/498/13 : Lyman-{alpha} emitters from redshifts z~2-3 (Nilsson+, 2009)J/MNRAS/401/1521 : Stellar masses of Lyman break gal. at z~3 (Magdis+, 2010)J/ApJS/193/30 : UV-to-FIR analysis of sources in the EGS. II. (Barro+, 2011)J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)J/ApJ/735/86 : NEWFIRM MBS: photometric catalogs (Whitaker+, 2011)J/ApJ/744/44 : H{alpha} and UV fluxes in nearby galaxies (Weisz+, 2012)J/ApJ/769/80 : Spitzer/IRAC observations of five deep fields (Ashby+, 2013)J/ApJS/206/10 : CANDELS multiwavelength catalog (Galametz+, 2013)J/ApJS/207/24 : GOODS-S CANDELS multiwavelength catalog (Guo+, 2013)J/ApJ/777/18 : Stellar mass functions of galaxies to z=4 (Muzzin+, 2013)J/ApJ/762/46 : SHARDS: GOODS-N spectrophot. survey (Perez-Gonzalez+, 2013)J/ApJ/772/48 : Emission-line galaxies from PEARS. II. (Pirzkal+, 2013)J/MNRAS/428/1128 : UDS/COSMOS HiZELS galaxies (Sobral+, 2013)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)J/ApJ/803/34 : z~4-10 galaxies from HST legacy fields (Bouwens+, 2015)J/ApJ/810/71 : UV mag of cand. galaxies at 3~<z~<8.5 (Finkelstein+, 2015)J/MNRAS/457/3743 : Massive quiescent galaxies SFHs (Dominguez Sanchez+, 2016)J/ApJ/817/118 : SFR-M_*_ relation from ZFOURGE (Tomczak+, 2016)J/ApJS/228/7 : Multi-wavelength data in CANDELS COSMOS (Nayyeri+, 2017)J/ApJS/229/32 : CANDELS: multiwavelength cat. in the EGS (Stefanon+, 2017)J/MNRAS/478/3740 : High-z LAEs and LBGs in SHARDS survey (Arrabal Haro+, 2018)J/ApJ/854/29 : High-EW [OIII] and Ha emitters from 3D-HST (Maseda+, 2018)J/ApJ/876/135 : 33 Optically faint galaxies (Alcalde Pampliega+, 2019)J/A+A/630/A153 : SEDs & templates of LBGs at z~3 (Alvarez-Marquez+, 2019)J/ApJS/243/22 : CANDELS/SHARDS in GOODS-N (Barro+, 2019)J/ApJ/871/233 : Photometric redshifts in the EGOODS-North field (Hsu+, 2019)J/ApJ/929/121 : Bulge & disk data from SHARDS & HST (Costantin+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/950/125https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/950/125http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/950/125https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/950/125https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/950/125http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/950/125GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/950/125/table3 (SHARDS/CANDELS faint catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/950/125/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/950/125/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/950/125/table3?GETtext/xml+votable180.050000true189.3187346762.185325420.0055555555555555566/11252https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/950/125?format=asciiOpticalInfrareddefaultJ/ApJ/950/125/table3SHARDS/CANDELS faint catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[188.94/189.52] Right Ascension (J2000)degpos.eq.ra;meta.mainindexedb_tmw[-1.4/10.8] Lower limit for the mass-weighted ageGyrtime.age;stat.minfloatB_tmw[0/13.3] Upper limit for the mass-weighted ageGyrtime.age;stat.maxfloatZ[0.02/1] MetallicitySunphys.abund.Zfloatb_Z[0.02/0.4] Lower limit for the metallicitySunphys.abund.Z;stat.minfloatB_Z[0.2/1] Upper limit for the metallicitySunphys.abund.Z;stat.maxfloatIDCatalog identifiermeta.idcharRMMIAU position-based designation (Jddd.dddddddd+dd.dddddddd)meta.id;meta.maincharDEJ2000[62/62.4] Declination (J2000)degpos.eq.dec;meta.mainindexedzph[0.01/7] Photometric redshiftsrc.redshift.photfloatimag[23.5/29.6]? Aparent AB magnitude in i band (HST F775W); "inf" values have been set to NULL by CDSmagphot.mag;em.opt.Ifloatnullableb_imag? Lower limit for imagmagphot.mag;stat.min;em.opt.IfloatnullableB_imag? Upper limit for imagmagphot.mag;stat.max;em.opt.IfloatnullableHmag[23.4/29.8]? Aparent AB magnitude in H band (HST F160W); "inf" values have been set to NULL by CDSmagphot.mag;em.IR.Hfloatnullableb_Hmag? Lower limit for Hmagmagphot.mag;stat.min;em.IR.HfloatnullableB_Hmag? Upper limit for Hmagmagphot.mag;stat.max;em.IR.HfloatnullableNdet[4/47] Number of bands with detectionsmeta.numberintNupl[0/43] Number of upper limitsmeta.numberintlogM[1.5/13.3] Decimal log of the stellar masslog(solMass)phys.massfloatb_logM[1.2/13.2] Lower limit for the decimal log of the stellar masslog(solMass)phys.mass;stat.minfloatB_logM[1.8/13.3] Upper limit for the decimal log of the stellar masslog(solMass)phys.mass;stat.maxfloatSFR[0/6683] Star formation rate (280nm)solMass/yrphys.SFRdoubleb_SFR[-10694/1842] Lower limit for the star formation rate (280nm)solMass/yrphys.SFR;stat.mindoubleB_SFR[0.01/24058] Upper limit for the star formation rate (280nm)solMass/yrphys.SFR;stat.maxdoubleU-V[-0.81/3.27] U-V colormagphot.color;em.opt.U;em.opt.Vfloatb_U-V[-2.5/3.1] Lower limit for U-Vmagphot.color;em.opt.U;em.opt.VfloatB_U-V[-0.7/5.42] Upper limit for U-Vmagphot.color;em.opt.U;em.opt.VfloatV-J[-0.93/2.77] V-J colormagphot.color;em.opt.V;em.IR.Jfloatb_V-J[-2.8/2.6] Lower limit for V-Jmagphot.color;em.opt.V;em.IR.JfloatB_V-J[-0.8/6.2] Upper limit for V-Jmagphot.color;em.opt.V;em.IR.Jfloatbeta[-2.9/1] UV-continuum slopespect.index;em.UVfloatb_beta[-47892/1] Lower limit for the UV-continuum slopespect.index;stat.min;em.UVdoubleB_beta[-2.9/47887] Upper limit for the UV-continuum slopespect.index;stat.max;em.UVfloatAv-beta[0/3.33] A(V) extinction extracted from the UV-continuum slopemagphys.absorptionfloatb_Av-beta[0/1.34] Lower limit for the A(V) extinction extracted from the UV-continuum slopemagphys.absorption;stat.min;em.UVfloatB_Av-beta[0/5.93] Upper limit for the A(V) extinction extracted from the UV-continuum slopemagphys.absorption;stat.max;em.UVfloatAv[0/2] A(V) extinction derived from the SED full spectral fittingmagphys.absorptionfloatb_Av[0/1.96] Lower limit for the A(V) extinction derived from the SED full spectral fittingmagphys.absorption;stat.minfloatB_Av[0.01/2.82] Upper limit for the A(V) extinction derived from the SED full spectral fittingmagphys.absorption;stat.maxfloatt0[0.001/12.2] AgeGyrtime.agefloatb_t0[-1.3/11] Lower limit for the ageGyrtime.age;stat.minfloatB_t0[0.001/13.5] Upper limit for the ageGyrtime.age;stat.maxfloattau[100/1000] Star formation timescaleMyrphys.SFR;time.scaleintb_tau[-297/990] Lower limit for the star formation timescaleMyrphys.SFR;time.scale;stat.minintB_tau[110/1330] Upper limit for the star formation timescaleMyrphys.SFR;time.scale;stat.maxinttmw[0/12.1] Mass-weighted ageGyrtime.agefloat