J/MNRAS/458/3443ivo://CDS.VizieR/J/MNRAS/458/3443doi:10.26093/cds/vizier.74583443CDSSobral D.Stroe A.Koyama Y.Darvish B.Calhau J.Afonso A.,Kodama T.Nakata F.2024-08-16T20:16:17Z2017-07-18T12:12:55ZCDS support team

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

cds-question@unistra.frgalaxy-clustersredshiftedspectroscopyCluster star-forming galaxies are found to have an excess of far-infrared emission relative to H{alpha}, when compared to those in the field, which could be caused by intense active galactic nuclei (AGN) activity, dust and/or declining star formation histories. Here we present spectroscopic observations of H{alpha} emitters in the Cl 0939+4713 (Abell 851) super-cluster at z=0.41, using AF2+ WYFFOS on the William Herschel Telescope. We measure [OII], H{beta}, [OIII], H{alpha} and [NII] for a sample of 119 H{alpha} emitters in and around the cluster. We find that 17+/-5 per cent of the H{alpha} emitters are AGN, irrespective of environment. For star-forming galaxies, we obtain Balmer decrements, metallicities and ionization parameters with different methods, individually and by stacking. We find a strong mass-metallicity relation at all environments, with no significant dependence on environment. The ionization parameter declines with increasing stellar mass for low-mass galaxies. H{alpha} emitters residing in intermediate environments show the highest ionization parameters (along with high [OIII]/H{alpha} and high [OIII]/[OII] line ratios, typically twice as large as in the highest and lowest densities), which decline with increasing environmental density. Dust extinction (A_H{alpha}_) correlates strongly with stellar mass, but also with environmental density. Star-forming galaxies in the densest environments are found to be significantly dustier (A_H{alpha}_~=1.5-1.6) than those residing in the lowest density environments (A_H{alpha}_~=0.6), deviating significantly from what would be predicted given their stellar masses.2016MNRAS.458.3443Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/458/3443CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/416/2041 : H{alpha} emitters at z=2.23 (Matsuda+, 2011)J/ApJ/765/26 : Very low-z SDSS galaxies with H{alpha} emission (Shim+ 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/458/3443https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/458/3443http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/458/3443https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/458/3443https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/458/3443http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/458/3443GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/458/3443/tablea1 (H{alpha} emitters in our spectroscopic sample with Flags 1,2,3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/458/3443/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/458/3443/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/458/3443/tablea1?GETtext/xml+votable180.050000true145.6854333347.028386110.0055555555555555566/5857 58602.040811542443644e-19 2.3647030891844645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/458/3443?format=asciidefaultJ/MNRAS/458/3443/tablea1H{alpha} emitters in our spectroscopic sample with Flags 1,2,3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDName (DUSQ_NNN)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainzspSpectroscopic redshiftsrc.redshiftdoublee_zsprms uncertainty on zspstat.errordoublezmagSDSS z' magnitudemagphot.mag;em.opt.IfloatlogF(Ha)Flux in H{alpha}log(mW.m**-2)phot.flux;em.line.HalphadoublelogSigma10Local environmental densitylog(Mpc**-2)src.densityfloat[NII]/Ha? [NII]6584/H{alpha} line flux ratiophot.flux;arith.ratio;spect.linedoublenullable[OIII]/Hb? [OIII]5007/H{beta} line flux ratiophot.flux;em.line.OIII;arith.ratiodoublenullable[OIII]/Ha? [OIII]5007/H{alpha} line flux ratiophot.flux;arith.ratiodoublenullable[OII]/Ha? [OII]3727/H{alpha} line flux ratiophot.flux;arith.ratiodoublenullablelogM*Stellar masslog(solMass)phys.massdoubleFlag[1/3] Flag (1)meta.code.errorintAGN[-1/2]? AGN flag (2)meta.codeintnullablePoint[1/4] Pointing identification numbermeta.idintB-IB-I colour indexmagphot.color;em.opt.B;em.opt.IfloatEWrestRest-frame H{alpha}+[NII] equivalent width0.1nmspect.line.eqWidth;em.line.HalphadoubleRcRadius used to calculate logSigma10arcminphys.angSizedoubleSimbadSimbad column added by the CDSmeta.ref.urlchar