J/ApJ/711/928ivo://CDS.VizieR/J/ApJ/711/928doi:10.26093/cds/vizier.17110928CDSCowie L.L.Barger A.J.Hu E.M.2017-07-12T15:17:24Z2012-05-14T11:41:10ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyredshiftedultraviolet-astronomyline-intensitiesactive-galactic-nucleiWe construct a sample of low-redshift Ly{alpha} emission-line selected sources from Galaxy Evolution Explorer (GALEX) grism spectroscopy of nine deep fields to study the role of Ly{alpha} emission in galaxy populations with cosmic time. Our final sample consists of 119 (141) sources selected in the redshift interval z=0.195-0.44 (z=0.65-1.25) from the FUV (NUV) channel. We classify the Ly{alpha} sources as active galactic nuclei (AGNs) if high-ionization emission lines are present in their UV spectra and as possible star-forming galaxies otherwise. We classify additional sources as AGNs using line widths for our Ly{alpha} emitter (LAE) analysis. These classifications are broadly supported by comparisons with X-ray and optical spectroscopic observations, though the optical spectroscopy identifies a small number of additional AGNs. Defining the GALEX LAE sample in the same way as high-redshift LAE samples, we show that LAEs constitute only about 5% of NUV-continuum selected galaxies at z~0.3. We also show that they are less common at z~0.3 than they are at z~3. Finally, we confirm that the z~2 Lyman break galaxies have relatively low metallicities for their luminosities, and we find that they lie in the same metallicity range as the z~0.3 Ly{alpha} galaxies.2010ApJ...711..928Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/711/928CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/703/2160 : The OPTX project. III. (Trouille+, 2009)J/ApJS/179/1 : The OPTX project: CLANS, CLASXS and CDF-N (Trouille+, 2008)J/ApJS/179/19 : CDFS survey: 2 Ms source catalogs (Luo+, 2008)J/ApJ/680/1072 : Ly{alpha}-emitting galaxies at 0.2<z<0.35 (Deharveng+, 2008)J/A+A/461/823 : Candidate Ly{alpha} emitting galaxies (Venemans+, 2007)J/AJ/131/2373 : Extended Chandra Deep Field-South survey (Virani+, 2006)J/ApJS/161/21 : Extended Chandra Deep Field-South survey (Lehmer+, 2005)J/ApJ/614/75 : Lyman{alpha} emitting galaxies at z=2.38 (Francis+, 2004)J/ApJ/738/136 : LAEs between 0.19<z<1.25 with GALEX grism (Cowie+, 2011)J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)J/ApJ/508/200 : QSO low-z Ly{alpha} absorbers (Tripp+, 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/711/928https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/711/928http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/711/928https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/711/928https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/711/928http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/711/928GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/711/928/deimos (DEIMOS observations samples (tables 11--13 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/711/928/deimos?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/711/928/deimos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/711/928/deimos?GETtext/xml+votable180.050000true9.52054111-43.874580.005555555555555556Cone search capability for table J/ApJ/711/928/table14 (GALEX X-ray properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/711/928/table14?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/711/928/table14?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/711/928/table14?GETtext/xml+votable180.050000true53.1104-27.67660.005555555555555556Cone search capability for table J/ApJ/711/928/lae (GALEX LAE samples (tables 15 and 16 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/711/928/lae?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/711/928/lae?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/711/928/lae?GETtext/xml+votable180.050000true259.7482659.825751940.005555555555555556Cone search capability for table J/ApJ/711/928/galex (GALEX spectral identifications in the nine fields used for deep GALEX grism observations (tables 2--10 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/711/928/galex?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/711/928/galex?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/711/928/galex?GETtext/xml+votable180.050000true214.1477661152.8715550.0055555555555555565/6814 6/6071 6077 6114 6120 9150 9151 10189 10191 10200 10212 10213 10517 11227 11230 11252 11424 11425 11427 11428 35388 35389 35390 35934 35935 35956 359577.447298006782415e-19 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/711/928?format=asciiOpticalUVdefaultJ/ApJ/711/928/deimosDEIMOS observations samples (tables 11--13 of the paper)NUVmagGALEX NUV magnitudemagphot.mag;em.UVfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintOsrc.classcharGALEXGALEX identification (HHMM+DDMM; J2000)meta.id;meta.maincharm_GALEXMultiplicity index on GALEX name (G1)meta.code.multipcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.maingmag? SDSS-DR6 model C g-band magnitude (not for table 12)magphot.mag;em.opt.BfloatnullablezGALEX? GALEX redshiftsrc.redshift;pos.heliocentricfloatnullablezspOptical spectroscopic redshiftsrc.redshift;pos.heliocentricfloatEW? Observed-frame H{alpha} equivalent width (not for table 12)0.1nmspect.line.eqWidth;em.line.Halphaintnullablee_EW? The 1{sigma} error on EW0.1nmstat.error;spect.line.eqWidthintnullableClassObject type from the optical spectrum (Galaxy, Seyfert 1.8/1.5 or AGN)src.classcharDR6Display the SDSS-DR6 and DR7 for this galaxy, within 3"meta.ref.urlcharAllDisplay the data from all tables for objects with this truncated GALEX namemeta.ref.urlcharSloanDisplay the SDSS online data for this galaxymeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharJ/ApJ/711/928/table14GALEX X-ray propertiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGALEXGALEX designation (HHMM+DDMM; J2000)meta.id;meta.maincharm_GALEXMultiplicity index on GALEX name (G1)meta.code.multipcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainFhard? Chandra flux in 2-8keV band (1)mW.m**-2phot.flux;em.X-raydoublenullableFsoft? Chandra flux in 0.5-2keV band (1)mW.m**-2phot.flux;em.X-raydoublenullablel_logLLimit flag on logLmeta.code.errorcharlogLChandra log of luminosity in 2-8keV bandlog(1e-07W)phys.luminosity;em.X-rayfloatzGALEXGALEX redshiftsrc.redshift;pos.heliocentricfloatClassObject type (AGN or Galaxy)src.classcharAllDisplay the data from all tables for objects with this truncated GALEX namemeta.ref.urlcharJ/ApJ/711/928/laeGALEX LAE samples (tables 15 and 16 of the paper)ClassOptical object type (AGN, BPT AGN or SF) (3)spect.dopplerVeloc.opt;em.optcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSmeta.codecharGALEXGALEX designation (HHMM+DDMM; J2000)meta.id;meta.maincharm_GALEXMultiplicity index on GALEX name (G1)meta.code.multipcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainNUVmagGALEX NUV magnitudemagphot.mag;em.UVfloatFUVmagGALEX FUV magnitudemagphot.mag;em.UVfloatzGALEXGALEX redshiftsrc.redshift;pos.heliocentricfloatlogLLog of Ly{alpha} luminosity (1)log(1e-07W)phys.luminosityfloate_logLThe 1{sigma} error on logLlog(1e-07W)stat.errorfloatEWRest-frame Ly{alpha} equivalent width0.1nmspect.line.eqWidthinte_EWThe 1{sigma} error on EW0.1nmstat.error;spect.line.eqWidthintzsp? Ground-based redshiftsrc.redshift;pos.heliocentricfloatnullabler_zsp[pf] Flag on zsp (2)meta.ref;pos.framecharAllDisplay the data from all tables for objects with this truncated GALEX namemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharJ/ApJ/711/928/galexGALEX spectral identifications in the nine fields used for deep GALEX grism observations (tables 2--10 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/69] Running sequence numbermeta.idintf_GALEX[ob] Flag on source (1)meta.codecharFieldRegion observed (see the "Note on table2.dat" section above for details on the fields)obs.fieldcharGALEXGALEX name (HHMM+DDMM; J2000)meta.id;meta.maincharm_GALEXmeta.code.multipcharRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainNUVmag? GALEX NUV magnitudemagphot.mag;em.UVfloatnullableFUVmag? GALEX FUV magnitudemagphot.mag;em.UVfloatnullablezRedshiftsrc.redshiftfloatWidthLy{alpha} line widthkm/sspect.line.widthinte_WidthThe 1{sigma} error on Widthkm/sstat.error;spect.line.widthintClassObject type (AGN or Galaxy) from the UV spectrasrc.classcharAllDisplay the data from all tables for objects with this truncated GALEX namemeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar