J/ApJ/769/95ivo://CDS.VizieR/J/ApJ/769/95doi:10.26093/cds/vizier.17690095CDSBarrows R.S.Lacy C.H.S.Kennefick J.Comerford J.M.Kennefick D.,Berrier J.C.2017-12-22T05:32:05Z2015-01-16T10:35:19ZCDS support team

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

cds-question@unistra.frspectroscopyquasarsredshiftedactive-galactic-nucleiWe present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8<z<1.6 with double peaks in either of the high-ionization narrow emission lines [NeV]{lambda}3426 or [NeIII]{lambda}3869. These sources were selected with the intention of identifying high-redshift analogs of the z<0.8 active galactic nuclei (AGNs) with double-peaked [OIII]{lambda}5007 lines, which might represent AGN outflows or dual AGNs. Lines of high ionization potential are believed to originate in the inner, highly photoionized portion of the narrow line region, and we exploit this assumption to investigate the possible kinematic origins of the double-peaked lines. For comparison, we measure the [NeV]{lambda}3426 and [NeIII]{lambda}3869 double peaks in low-redshift (z<0.8) [OIII]-selected sources. We find that [NeV]{lambda}3426 and [NeIII]{lambda}3869 show a correlation between line splitting and line width similar to that of [OIII]{lambda}5007 in other studies, and the velocity splittings are correlated with the quasar Eddington ratio. These results suggest an outflow origin for at least a subset of the double peaks, allowing us to study the high-ionization gas kinematics around quasars. However, we find that a non-negligible fraction of our sample show no evidence for an ionization stratification. For these sources, the outflow scenario is less compelling, leaving the dual AGN scenario as a viable possibility. Finally, we find that our sample shows an anti-correlation between the velocity-offset ratio and luminosity ratio of the components, which is a potential dynamical argument for the presence of dual AGNs. Therefore, this study serves as a first attempt at extending the selection of candidate dual AGNs to higher redshifts.2013ApJ...769...95Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/769/95CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)J/ApJS/201/31 : Emission-line galaxies from SDSS. I. (Ge+, 2012)J/AJ/144/125 : Phot. and spectro. of Markarian 266 (Mazzarella+, 2012)J/ApJ/753/42 : Double-peaked AGN. I. Dual AGN candidates (Comerford+, 2012)J/ApJ/737/101 : AGN pairs from SDSS-DR7. I. (Liu+, 2011)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/716/866 : SDSS search for binary AGN (Smith+, 2010)J/ApJ/708/427 : Type 2 AGNs with double-peaked [OIII] lines (Liu+, 2010)J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/ApJ/705/L76 : AGNs with double-peaked [OIII] lines (Wang+, 2009)J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)J/A+A/417/515 : I Zw 1 unusual emission line spectrum (Veron-Cetty+, 2004)J/AJ/126/1720 : ugriz and H{alpha} of double-peaked AGN (Strateva+, 2003)J/AJ/126/1183 : Major galaxy mergers at z<~3 (Conselice+, 2003)J/ApJ/599/886 : Emission lines of radio-loud AGN (Eracleous+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/769/95https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/769/95http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/769/95https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/769/95https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/769/95http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/769/95GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/769/95/table3 (General quasar properties for our sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/769/95/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/769/95/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/769/95/table3?GETtext/xml+votable180.050000true1.3808750.24886110.0055555555555555566/640 4154 4157 4320 4341 4423 4427 4548 4551 4568 4630 4647 4689 4718 4812 4836 4914 4982 5050 5095 5176 5208 5284 5287 5292 5298 5407 5443 5524 5693 5719 5726 5765 6122 6166 6356 6367 6409 6411 6545 6568 6597 7224 7302 7312 7392 7514 8252 8337 8393 8394 8902 9002 9021 9450 9915 9975 10270 10305 10420 10450 10648 10829 10947 11070 11321 11407 11461 11480 11813 11820 11881 11914 11950 11960 14996 17819 17983 18091 18114 18159 18302 18389 21876 23045 23054 26050 26072 26345 26364 26418 26538 26988 27097 27098 27427 27445 27470 27510 27513 27523 27657 27671 27686 27700 27769 27853 27877 27893 27926 27958 27964 28028 28053 28217 28315 28325 28330 28488 28508 28586 28640 28641 28666 31402 36775 36778 49149https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/769/95?format=asciiOpticaldefaultJ/ApJ/769/95/table3General quasar properties for our samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS quasar namemeta.id;meta.maincharprimaryzsdss[0.8/1.6] SDSS redshiftsrc.redshift;pos.heliocentricfloate_zsdss[0.0009/0.006] Error in zsdssstat.errorfloatzmgii[0.8/1.6] MgII redshiftsrc.redshift;pos.heliocentricfloate_zmgii[0.001/0.02] Error in zmgiistat.errorfloatdpSimbad column added by the CDSmeta.ref.urlcharFWHMfeiiFe II Full Width at Half Maximumkm/sspect.line.widthintFWHMmgii[1460/9828] Mg II FWHM (1)km/sspect.line.widthfloate_FWHMmgiiError in FWHMmgiikm/sstat.errorfloatfeddEddington Ratio as described in Section 5.2 (f_Edd_=L_bol_/L_Edd_)phys.luminosity;arith.ratiofloatSloanDisplay the online SDSS data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SDSS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS names (declination part)degpos.eq.dec;meta.mainJ/ApJ/769/95/table1Emission line properties for double-peaked [Ne V] {lambda}3426SDSSSDSS namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFb[4/150] Flux density; blue component (1)1e-19W.m**-2.nm**-1phot.fluxfloate_FbThe 1{sigma} uncertainty in Fluxb (1)1e-19W.m**-2.nm**-1stat.errorintdVb[-47/2387] Velocity offset from the quasar redshift; blue componentkm/sphys.veloc;arith.diffinte_dVb[0/327] The 1{sigma} uncertainty in dVbkm/sstat.errorintFWHMbFull Width at Half Maximum; blue componentkm/sspect.line.widthinte_FWHMbThe 1{sigma} uncertainty in FWHMbkm/sstat.errorintFr[5/245] Flux density; red component (1)1e-19W.m**-2.nm**-1phot.fluxfloate_FrThe 1{sigma} uncertainty in Fluxr (1)1e-19W.m**-2.nm**-1stat.errorintdVr[-831/721] Velocity offset from the quasar redshift; red componentkm/sphys.veloc;arith.diffinte_dVrThe 1{sigma} uncertainty in dVrkm/sstat.errorintFWHMrFull Width at Half Maximum; red componentkm/sspect.line.widthinte_FWHMrThe 1{sigma} uncertainty in FWHMrkm/sstat.errorintBrBroad component? 0='no', 1='yes'meta.codeintchi2[0.3/2.5] Reduced {chi}-squaredstat.fit.chi2floatdof[10/92] Number of degrees of freedommeta.numberintJ/ApJ/769/95/table2Emission line properties for double-peaked [Ne III] {lambda}3869recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS namemeta.id;meta.maincharFb[4/150] Flux density; blue component (1)1e-19W.m**-2.nm**-1phot.fluxfloate_FbThe 1{sigma} uncertainty in Fluxb (1)1e-19W.m**-2.nm**-1stat.errorintdVb[-47/2387] Velocity offset from the quasar redshift; blue componentkm/sphys.veloc;arith.diffinte_dVb[0/327] The 1{sigma} uncertainty in dVbkm/sstat.errorintFWHMbFull Width at Half Maximum; blue componentkm/sspect.line.widthinte_FWHMbThe 1{sigma} uncertainty in FWHMbkm/sstat.errorintFr[5/245] Flux density; red component (1)1e-19W.m**-2.nm**-1phot.fluxfloate_FrThe 1{sigma} uncertainty in Fluxr (1)1e-19W.m**-2.nm**-1stat.errorintdVr[-831/721] Velocity offset from the quasar redshift; red componentkm/sphys.veloc;arith.diffinte_dVrThe 1{sigma} uncertainty in dVrkm/sstat.errorintFWHMrFull Width at Half Maximum; red componentkm/sspect.line.widthinte_FWHMrThe 1{sigma} uncertainty in FWHMrkm/sstat.errorintBrBroad component? 0='no', 1='yes'meta.codeintchi2[0.3/2.5] Reduced {chi}-squaredstat.fit.chi2floatdof[10/92] Number of degrees of freedommeta.numberint