J/A+A/568/L8ivo://CDS.VizieR/J/A+A/568/L8doi:10.26093/cds/vizier.35689008CDSAmorin R.Sommariva V.Castellano M.Grazian A.Tasca L.A.M.,Fontana A.Pentericci L.Cassata P.Garilli B.Le Brun V.,Le Fevre O.Maccagni D.Thomas R.Vanzella E.Zamorani G.Zucca E.,Bardelli S.Capak P.Cassara L.P.Cimatti A.Cuby J.G.Cucciati O.,de la Torre S.Durkalec A.Giavalisco M.Hathi N.P.Ilbert O.,Lemaux B.C.Moreau C.Paltani S.Ribeiro B.Salvato M.Schaerer D.,Scodeggio M.Talia M.Taniguchi Y.Tresse L.Vergani D.Wang P.W.,Charlot S.Contini T.Fotopoulou S.Lopez-Sanjuan C.Mellier Y.,Scoville N.2017-07-03T14:25:58Z2014-08-22T09:28:19ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyredshiftedchemical-abundancessurveysWe report the discovery of 31 low-luminosity (-14.5>~M_AB_(B)>~-18.8), extreme emission line galaxies (EELGs) at 0.2<~z<~0.9 identified by their unusually high rest-frame equivalent widths (100<=EW[OIII]<=1700{AA}) as part of the VIMOS Ultra Deep Survey (VUDS). VIMOS optical spectra of unprecedented sensitivity (I_AB_~25mag) along with multiwavelength photometry and HST imaging are used to investigate spectrophotometric properties of this unique sample and to explore, for the first time, the very low stellar mass end (M_*_<~10^8^M_{sun}_) of the luminosity-metallicity (LZR) and mass-metallicity (MZR) relations at z<1. Characterized by their extreme compactness (R_50_<1kpc), low stellar mass and enhanced specific star formation rates (sSFR=SFR/M_*_~10^-9^-10^-7^yr^-1^), the VUDS EELGs are blue dwarf galaxies likely experiencing the first stages of a vigorous galaxy-wide starburst. Using Te-sensitive direct and strong-line methods, we find that VUDS EELGs are low-metallicity (7.5<~12+log(O/H)<~8.3) galaxies with high ionization conditions (log(q_ion_)>~8cm/s), including at least three EELGs showing HeII{lambda}4686{AA} emission and four extremely metal-poor (<~10% solar) galaxies. The LZR and MZR followed by VUDS EELGs show relatively large scatter, being broadly consistent with the extrapolation toward low luminosity and mass from previous studies at similar redshift. However, we find evidence that galaxies with younger and more vigorous star formation --as characterized by their larger EWs, ionization and sSFR-- tend to be more metal poor at a given stellar mass.2014A&A...568L...8Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/568/L8CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/265 : COSMOS Morphological Catalog (V1.1) (Tasca+ 2009)III/250 : The VIMOS VLT deep survey (VVDS-DEEP) (Le Fevre+ 2005)J/ApJ/743/77 : Extremely metal-poor galaxies in SDSS (Morales-Luis+, 2011)J/ApJ/742/111 : Extreme emission-line galaxies in CANDELS (van der Wel+, 2011)J/ApJ/728/38 : AEGIS: demographics of X-ray and optical AGN (Yan+, 2011)J/A+A/512/A12 : VLT/VIMOS spectroscopy in GOODS-South field (Balestra+, 2010)J/A+A/495/53 : Physical properties of VVDS galaxies (Lamareille+, 2009)J/ApJ/675/234 : Stellar mass in galaxies 0<z<4 (Perez-Gonzalez+, 2008)J/ApJS/153/429 : SDSS strong emission line HII galaxies (Kniazev+, 2004)J/A+A/428/1043 : Redshifts from VIMOS VLT Deep Survey (Le Fevre+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/568/L8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/568/L8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/568/L8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/568/L8https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/568/L8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/568/L8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/568/L8/eelg (Properties and emission line fluxes of extreme emission line galaxies in VUDS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/568/L8/eelg?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/568/L8/eelg?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/568/L8/eelg?GETtext/xml+votable180.050000true36.28853194-4.5004150.0055555555555555566/17692 27256 27258-27259 35935 359572.367228618189496e-19 2.6706780932288093e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/568/L8?format=asciiOpticaldefaultJ/A+A/568/L8/eelgProperties and emission line fluxes of extreme emission line galaxies in VUDSc(Hb)Reddening constantphys.absorptionfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDVUDS ID NUMBERmeta.id;meta.mainRAJ2000Right Ascension J2000.0degpos.eq.ra;meta.mainDEJ2000Declination J2000.0degpos.eq.dec;meta.mainz[0.2/0.9] Spectroscopic redshiftsrc.redshiftfloatImag[23.3/25.4] I-band apparent AB magnitudemagphot.mag;em.opt.IfloatBMagResft-frame B-band absolute AB magnitude from SED best-fittingmagphys.magAbs;em.opt.BfloatM*Stellar mass from SED fitting (3)solMassphys.massfloatE_M*Positive uncertainty in stellar mass (4)solMassstat.error;stat.maxfloate_M*Negative uncertainty in stellar mass (4)solMassstat.errorfloatlogSFRLogarithm of star formation rate (5)log(solMass.yr**-1)phys.SFRfloate_logSFRUncertainty in logSFR (6)log(solMass.yr**-1)stat.error;phys.SFRfloatAb(O)[7.5/8.4] Gas-phase metallicity [12+log(O/H)]phys.abund.Zfloate_Ab(O)1{sigma} uncertainty in metallicity (6)stat.errorfloatn_Ab(O)[ds] Method for metallicity derivation (7)meta.notecharF(3727)line flux [OII]3727 in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;spect.linefloate_F(3727)? error in [OII]3727 line flux (1)zW.m**-2stat.errorfloatnullableF(3868)? line flux [NeIII]3868 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;spect.linefloatnullablee_F(3868)? error in [NeIII]3868 line flux (1)zW.m**-2stat.errorfloatnullableF(Hg)? H{gamma} line flux in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;em.line.Hgamma;spect.linefloatnullablee_F(Hg)? error in H{gamma} line flux (1)zW.m**-2stat.errorfloatnullableF(4363)? line flux [OIII]4363 in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;em.line.OIII;spect.linefloatnullablee_F(4363)? error in [OIII]4363 line flux (1)zW.m**-2stat.errorfloatnullableF(Hb)H{beta} line flux in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;em.line.Hbeta;spect.linefloate_F(Hb)error in H{beta} line flux (1)zW.m**-2stat.errorfloatF(4959)line flux [OIII]4959 in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;em.line.OIII;spect.linefloate_F(4959)error in [OIII]4959 line flux (1)zW.m**-2stat.errorfloatF(5007)line flux [OIII]5007 in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;em.line.OIII;spect.linefloate_F(5007)error in [OIII]5007 line flux (1)zW.m**-2stat.errorfloatF(Ha)? H{alpha} line flux in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;em.line.Halpha;spect.linefloatnullablee_F(Ha)? error in H{alpha} line flux (1)zW.m**-2stat.errorfloatnullableF(6584)? line flux [NII]6584 in 10^-18^ergs/s/cm^2^zW.m**-2phot.flux;spect.linefloatnullablee_F(6584)? error in [NII]6584 line flux (1)zW.m**-2stat.errorfloatnullablee_c(Hb)error in reddening constantstat.errorfloatf_c(Hb)[ab] Method for the reddening constant (2)meta.codechar