J/ApJ/959/48ivo://CDS.VizieR/J/ApJ/959/48doi:10.26093/cds/vizier/ba-xz-1gCDSPharo J.Guo Y.Calvo G.B.Teppala T.Bian F.Carleton T.Faber S.,Guhathakurta P.Koo D.C.2026-07-02T12:01:11Z2026-02-24T07:18:32ZCDS support team

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

cds-question@unistra.frdwarf-galaxiesvisible-astronomyspectroscopychemical-abundancesredshiftedWe present gas-phase metallicity measurements for 583 emission line galaxies at 0.3<z<0.85, including 388 dwarf galaxies with log(M_*_/M_{sun}_)<9.5, and explore the dependence of the metallicity on the stellar mass and star formation (SF) properties of the galaxies. Metallicities are determined through the measurement of emission lines in very deep (~7hr exposure) Keck/DEIMOS spectra taken primarily from the HALO7D survey. We measure metallicity with three strong-line calibrations (O3H{beta}, R23, and O3O2) for the overall sample, as well as with the faint [NeIII]{lambda}3869 and [OIII]{lambda}4363 emission lines for 112 and 17 galaxies where robust detections were possible. We construct mass-metallicity relations (MZR) for each calibration method, finding MZRs consistent with other strong-line results at comparable redshift, as well as with z~0 galaxies. We quantify the intrinsic scatter in the MZR as a function of mass, finding it increases with lower stellar mass. We also measure a weak but significant correlation between increased MZR scatter and higher specific star formation rate (SFR). We find a weak influence of SFR in the fundamental metallicity relation as well, with an SFR coefficient of {alpha}=0.21. Finally, we use the flux ratios of the [OII]{lambda}{lambda}3727,3729 doublet to calculate gas electron density in ~1000 galaxies with log(M_*_/M_{sun}_)<10.5 as a function of redshift. We measure low electron densities (n_e_~25cm^-3^) for z<1 galaxies, again consistent with z~0 conditions, but measure higher densities (n_e_~100cm^-3^) at z>1. These results all suggest that there is little evolution in star-forming interstellar medium conditions from z~1 to z=0, confirmed with a more complete sample of low-mass galaxies than has previously been available in this redshift range.2023ApJ...959...48Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/959/48CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/448/955 : Abundances of emission galaxies in SDSS-DR3 (Izotov+, 2006)J/ApJ/706/599 : H{alpha} and UV SFR in the local volume (Lee+, 2009)J/ApJS/193/13 : Spitzer/IRAC sources in the EGS I. SEDs (Barro+, 2011)J/ApJS/193/30 : UV-to-FIR analysis of sources in the EGS. II. (Barro+, 2011)J/ApJ/744/44 : H{alpha} and UV fluxes in nearby galaxies (Weisz+, 2012)J/ApJS/203/24 : Structural param. of galaxies in CANDELS (van der Wel+, 2012)J/ApJ/765/140 : Stacked spectra of SDSS star forming galaxies (Andrews+, 2013)J/ApJS/206/8 : COSMOS/UltraVISTA Ks-selected catalogs v4.1 (Muzzin+, 2013)J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013)J/ApJ/795/165 : Line ratios in z~2-3 gal. from KBSS-MOSFIRE (Steidel+, 2014)J/ApJ/801/97 : GOODS-S & UDS stellar mass cat. from CANDELS (Santini+, 2015)J/ApJ/844/171 : Ly{alpha} profile in 43 Green Pea galaxies (Yang+, 2017)J/ApJS/243/22 : CANDELS/SHARDS multiwavelength cat. in GOODS-N (Barro+, 2019)J/ApJ/919/143 : HST-WFC3/IR grism sp. for CANDELS z~1-2 galaxies (Henry+, 2021)J/ApJS/256/44 : LEGA-C DR3: HR sp. of 0.6<z<1 gal. (van der Wel+, 2021)J/ApJS/261/12 : Deep redshift survey with Keck/DEIMOS sp. (Pharo+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/959/48https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/959/48http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/959/48https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/959/48https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/959/48http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/959/48GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/959/48/table1 (Metallicity catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/959/48/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/959/48/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/959/48/table1?GETtext/xml+votable180.050000true150.187352.29912780.0055555555555555566/11252 11425 27256 27258 35935https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/959/48?format=asciiOpticaldefaultJ/ApJ/959/48/table1Metallicity catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDHALO7D identifiermeta.id;meta.maincharzH7[0/0.9] Redshift from HALO7D catalogsrc.redshiftfloatRAJ2000[53/215.5] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-28/62.4] Declination (J2000)degpos.eq.dec;meta.mainlogMs[7.7/11.5] Log, Galaxy stellar masslog(solMass)phys.massfloatZ-O3Hb[7/9.3] Metallicity, O3Hb line ratiolog(Sun)phys.abund.ZfloatZ-R23[7/9.4] Metallicity, R23 line ratiolog(Sun)phys.abund.ZfloatZ-O3O2[7.3/9.1] Metallicity, O3O2 line ratiolog(Sun)phys.abund.ZfloatZ-Ne3O2[7/8.7]? Metallicity, Ne3O2 line ratiolog(Sun)phys.abund.ZfloatnullableZ-Te[7.3/8.5]? Metallicity, from Excitation Temperaturelog(Sun)phys.abund.ZfloatnullableO3Hb[0.09/13.3] Emission line ratio, [OIII]5007{AA}/H{beta}phot.flux;arith.ratio;spect.linefloate_O3Hb[0.05/4.6] Uncertainty in O3Hbstat.error;phot.flux;spect.linefloatR23[0.14/10.1] Emission line ratio, [OIII]4959,5007+[OII]3727,3729/H{beta}phot.flux;arith.ratio;spect.linefloate_R23[0.03/0.6] Uncertainty in R23stat.error;phot.flux;spect.linefloatO3O2[0.49/26] Emission line ratio, [OIII]4959,5007{AA}/[OII]3727,3729{AA}phot.flux;arith.ratio;spect.linefloate_O3O2[0.04/2.8] Uncertainty in O3O2stat.error;phot.flux;spect.linefloatNe3O2[0.06/1.9]? Emission line ratio, [NeIII]3869{AA}/[OII]3727,3729{AA}phot.flux;arith.ratio;spect.linefloatnullablee_Ne3O2[0.003/0.2]? Uncertainty in Ne3O2stat.error;phot.flux;spect.linefloatnullableFNeIII[10/6836]? Dust-corrected [NeIII]3869{AA} flux1e-19mW.m**-2phot.flux;spect.linefloatnullablee_FNeIII[0.8/59]? Uncertainty in FNeIII1e-19mW.m**-2stat.error;phot.flux;spect.linefloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullableFOIII[27/253]? Dust-corrected [OIII]4363{AA} flux1e-19mW.m**-2phot.flux;spect.line;em.line.OIIIfloatnullablee_FOIII[2.7/27]? Uncertainty in FOIII1e-19mW.m**-2stat.error;phot.flux;em.line.OIIIfloatnullableEx[0/1]? Excitation diagnostic flags (1)meta.codeintnullable