J/MNRAS/471/1910ivo://CDS.VizieR/J/MNRAS/471/1910doi:10.26093/cds/vizier.74711910CDSJoshi R.Srianand R.Petitjean P.Noterdaeme P.2024-08-17T20:20:16Z2020-07-03T15:00:00ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsline-intensitiesspectroscopyWe present nebular emission associated with 198 strong Mg II absorbers at 0.35<=z<=1.1 in the fibre spectra of quasars from the Sloan Digital Sky Survey. Measured [OII] luminosities (L_[OII]_) are typical of sub-L* galaxies with derived star formation rate (uncorrected for fibre losses and dust reddening) in the range of 0.5-20M_{sun}_/yr. Typically less than ~3 per cent of the MgII systems with rest equivalent width, W_2796_>=2{AA}, show L_[OII]_>=0.3L*_[OII]_. The detection rate is found to increase with increasing W_2796_ and z. No significant correlation is found between W_2796_ and L_[OII]_ even when we restrict the samples to narrow z ranges. A strong correlation is seen between L_[OII]_ and z. While this is expected from the luminosity evolution of galaxies, we show that finite fibre size plays a very crucial role in this correlation. The measured nebular line ratios (like [OIII]/[OII] and [OIII]/H {beta}) and their z evolution are consistent with those of galaxies detected in deep surveys. Based on the median stacked spectra, we infer the average metallicity (logZ~8.3), ionization parameter (logq~7.5) and stellar mass (log (M/M_{sun}_)~9.3). The MgII systems with nebular emission typically have W_2796_>=2{AA}, MgII doublet ratio close to 1 and W(FeII{lambda}2600)/W_2796_~0.5 as often seen in damped Ly {alpha} and 21-cm absorbers at these redshifts. This is the biggest reported sample of [OII] emission from MgII absorbers at low-impact parameters ideally suited for probing various feedback processes at play in z<=1 galaxies.2017MNRAS.471.1910Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/471/1910CatalogResearchIsServedByTAP VizieR generic servicerelated-tohttp://skyserver.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/471/1910https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/471/1910http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/471/1910https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/471/1910https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/471/1910http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/471/1910GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/471/1910/catalogCatalog of MgII absorber galaxies with nebular emissionSimbadNameSimbad column added by the CDSmeta.idcharZabsAbsorber Redshiftsrc.redshiftfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the source, SDSS-JHHMMSS.ss+DDMMSS.s or BOSS-JHHMMSS.ss+DDMMSSmeta.id;meta.maincharn_Name[*] Note on Name (1)meta.notecharPlateSDSS Platemeta.noteintMJDSDSS MJDtime.epochintFiberSDSS Fibermeta.noteintZQSOQuasar Emission Redshiftsrc.redshift;pos.heliocentricfloatL[OII]Lumimosity of [OII](3727,3729) line (2)1e+33Wphys.luminosityfloate_L[OII]Error on [OII] line luminosity1e+33Wstat.errorfloatl_L[OIII]Limit flag on L[OIII]meta.code.errorcharL[OIII]Lumimosity of [OIII]5008 line (2)1e+33Wphys.luminosityfloate_L[OIII]? Error on OIII line luminosity1e+33Wstat.errorfloatnullablel_LHbetaLimit flag on LHbetameta.code.errorcharLHbetaLumimosity of H{beta}4862 line (2)1e+33Wphys.luminosity;em.line.Hbetafloate_LHbeta? Error on Hbeta line luminosity1e+33Wstat.errorfloatnullableEWMgIIEquivalent Width of MgII27960.1nmspect.line.eqWidthfloate_EWMgIIError on Equivalent Width of MgII27960.1nmstat.errorfloatSpInteractive spectrum from SDSSmeta.ref.urlchar