J/ApJ/827/74ivo://CDS.VizieR/J/ApJ/827/74doi:10.26093/cds/vizier.18270074CDSWuyts E.Wisnioski E.Fossati M.Forster Schreiber N.M.Genzel R.,Davies R.Mendel J.T.Naab T.Rottgers B.Wilman D.J.Wuyts S.,Bandara K.Beifiori A.Belli S.Bender R.Brammer G.B.Burkert A.,Chan J.Galametz A.Kulkarni S.K.Lang P.Lutz D.Momcheva I.G.,Nelson E.J.Rosario D.Saglia R.P.Seitz S.Tacconi L.J.Tadaki K.-I.,Ubler H.van Dokkum P.2019-02-27T12:00:06Z2017-10-27T10:29:51ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopychemical-abundancesredshiftedWe present measurements of the [NII]/H{alpha} ratio as a probe of gas-phase oxygen abundance for a sample of 419 star-forming galaxies at z=0.6-2.7 from the KMOS^3D^ near-IR multi-integral field unit (IFU) survey. The mass-metallicity relation (MZR) is determined consistently with the same sample selection, metallicity tracer, and methodology over the wide redshift range probed by the survey. We find good agreement with long-slit surveys in the literature, except for the low-mass slope of the relation at z~2.3, where this sample is less biased than previous samples based on optical spectroscopic redshifts. In this regime we measure a steeper slope than some literature results. Excluding the contribution from active galactic nuclei from the MZR reduces sensitivity at the high-mass end, but produces otherwise consistent results. There is no significant dependence of the [NII]/H{alpha} ratio on star formation rate at fixed redshift and stellar mass. The IFU data allow spatially resolved measurements of [NII]/H{alpha}, from which we can infer abundance gradients for 180 galaxies, thus tripling the current sample in the literature. The observed gradients are on average flat, with only 15 gradients statistically offset from zero at >3{sigma}. We have modeled the effect of beam smearing, assuming a smooth intrinsic radial gradient and known seeing, inclination, and effective radius for each galaxy. Our seeing-limited observations can recover up to 70% of the intrinsic gradient for the largest, face-on disks, but only 30% for the smaller, more inclined galaxies. We do not find significant trends between observed or corrected gradients and any stellar population, dynamical, or structural galaxy parameters, mostly in agreement with existing studies with much smaller sample sizes. In cosmological simulations, strong feedback is generally required to produce flat gradients at high redshift.2016ApJ...827...74Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/827/74CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/594/A77 : KMOS star-forming gal. Halpha data cubes (Di Teodoro+, 2016)J/ApJ/822/42 : z~3.3 star-forming galaxies NIR spectra (Onodera+, 2016)J/ApJ/817/10 : Star-forming z~2.1 galaxy metallicities (Grasshorn Gebhardt+,J/ApJS/220/12 : FMOS-COSMOS survey III. 0.7<z<2.5 galaxies (Silverman+, 2015)J/AJ/148/137 : Merging galaxies in COSMOS to z~1 (Lackner+, 2014)J/ApJS/214/24 : 3D-HST+CANDELS catalog (Skelton+, 2014)J/ApJ/768/74 : PHIBSS: CO obs. of star-forming galaxies (Tacconi+, 2013)J/ApJ/765/140 : Stacked spectra of SDSS star forming gal. (Andrews+, 2013)J/ApJS/203/24 : Structural param. of galaxies in CANDELS (van der Wel+, 2012)J/A+A/532/A90 : PACS Evolutionary Probe (PEP-DR1) catalogs (Lutz+, 2011)J/ApJ/706/1364 : SINS survey of high-redshift gal. (Forster Schreiber+, 2009)J/MNRAS/358/521 : Grid of chemical evolution models for galaxies (Molla+, 2005)J/AJ/116/2805 : H II regions in spiral galaxies (Van Zee+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/827/74https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/827/74http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/827/74https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/827/74https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/827/74http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/827/74GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/827/74/table3Target properties for all galaxies where the [NII]/H{alpha} ratio could be measuredrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/259] Running sequence numbermeta.id;meta.mainintz[0.7/2.6] Redshiftsrc.redshiftfloatlogM*[8.5/11.4] Stellar masslog(solMass)phys.massfloatre[0.5/16]? Effective radius r_e_kpcphys.size.radiusfloatnullableSFR[0.2/397.8] H{alpha} star formation rate (1)solMass/yrphys.SFR;spect.linefloatl_[NII]/HaLimit flag on [NII]/Hameta.code.errorchar[NII]/Ha[0.08/1.4] Integrated [NII]/H{alpha} ratiometa.notefloate_[NII]/Ha[0/0.3]? [NII]/Ha uncertaintystat.errorfloatnullabledN2/dr[-0.2/0.2]? {Delta}N2/{Delta}r value, in units of dex/kpc (2)arith.grad;phys.abundfloatnullablee_dN2/dr[0.002/0.08]? dN2/dr uncertaintystat.errorfloatnullableBCF[1.3/6.2]? Multiplicative beam-smearing correction factor for the N2 gradient (3)arith.factorfloatnullable