J/MNRAS/351/83ivo://CDS.VizieR/J/MNRAS/351/83doi:10.26093/cds/vizier.73510083CDSLandt H.Padovani P.Perlman E.S.Giommi P.2024-06-29T20:15:08Z2005-04-19T16:34:52ZCDS support team

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

cds-question@unistra.frquasarsbl-lacertae-objectsradio-sourcesline-intensitiesBlazars are currently separated into BL Lacertae objects (BL Lacs) and flat spectrum radio quasars based on the strength of their emission lines. This is performed rather arbitrarily by defining a diagonal line in the Ca H&K break value-equivalent width plane, following Marcha et al. (1996MNRAS.281..425M). We readdress this problem and put the classification scheme for blazars on firm physical grounds. We study ~100 blazars and radio galaxies from the Deep X-ray Radio Blazar Survey (DXRBS, Cat. <J/AJ/115/1253> and <J/MNRAS/323/757>) and 2-Jy radio survey and find a significant bimodality for the narrow emission line [OIII]{lambda}5007. This suggests the presence of two physically distinct classes of radio-loud active galactic nuclei (AGN). We show that all radio-loud AGN, blazars and radio galaxies, can be effectively separated into weak- and strong-lined sources using the [OIII]{lambda}5007-[OII]{lambda}3727 equivalent width plane. This plane allows one to disentangle orientation effects from intrinsic variations in radio-loud AGN. Based on DXRBS, the strongly beamed sources of the new class of weak-lined radio-loud AGN are made up of BL Lacs at the ~75 per cent level, whereas those of the strong-lined radio-loud AGN include mostly (~97 per cent) quasars.2004MNRAS.351...83Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/351/83CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/31 : The WGACAT version of ROSAT sources (White+ 2000)VIII/52 : The MIT-Green Bank 5GHz Survey (Bennett+, 1986-91)VIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-96)III/175 : Optical spectroscopy of radio sources (Stickel+, 1989-94)J/AJ/115/1253 : Deep X-Ray Radio Blazar Survey (DXRBS). I. (Perlman+ 1998)J/MNRAS/323/757 : Deep X-Ray Radio Blazar Survey (DXRBS). II. (Landt+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/351/83https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/351/83http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/351/83https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/351/83https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/351/83http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/351/83GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/351/83/qsos (BL Lac and Quasars (table 1, 2 and 3 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/351/83/qsos?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/351/83/qsos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/351/83/qsos?GETtext/xml+votable180.050000true5.9066674.2838890.005555555555555556Cone search capability for table J/MNRAS/351/83/table4 (DXRBS radio galaxies)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/351/83/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/351/83/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/351/83/table4?GETtext/xml+votable180.050000true31.21005815.2364010.0055555555555555566/158 556 595 597 1535 1702 4255 4260 5305 5870 6067 6093 6121 6244 7181 7220 7280 7371 7426 7492 7618 7860 8004 8067 8511 8562 8716 9146 9219 9460 9632-9633 9636 9882 10047 10163 10216 10386 10529 10642 10710 11027 11410 11536 12301 12610 15260 16434 16478 16483 16609 16652 16758 16784 17168 17300 17551 17637 17750 18002 18111 18155 18214 18640 18763 18795 18978 19045 19167 19603 19609 19617 20164 20483 20550 20609 21129 21704 21763 22574 22660 22691 22722 22724 22857 22914 23025 23210 23548 24123 24853 25245 25542 25832 26100 26207 26672 26859 26873 27161 27206 27520 27595 27715 27718 27862 28471 28485 28495 28516 28999 29672 31190 31991 32686 32994 33187 33195 33378 33656 33659 33662 33740 33755 33795 33823 34095 34097 34210 34406 34572 34648 35243 35720 36214 36433 36672 37384 37474-37475 38350 39004 39088 39522 40131 40795 42609 42658 42670 43307 43812 43908 43914 45564 45735 45874 46142 46277 46545 46563 46762 47141 47319 47649 47672 47805 48595 48926https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/351/83?format=asciiRadiodefaultJ/MNRAS/351/83/qsosBL Lac and Quasars (table 1, 2 and 3 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.intn_NameSimbad column added by the CDScharr_NameReference for emission-line data (2)charzRedshiftfloatNameObject name (G1)charl_logLHaLimit flag on logLHacharl_EWMgIILimit flag on EWMgIIcharEWMgII? MgII{lambda}2798 Rest frame equivalent width0.1nmfloatnullablel_logLMgIILimit flag on logLMgIIcharlogLMgII? MgII{lambda}2798 line luminositylog(1e-07W)floatnullablen_logLMgII[*] Note on logLMgII (3)charl_EW[OII]Limit flag on EW[OII]charEW[OII]? [O II]{lambda}3727 rest frame equivalent width0.1nmfloatnullablel_logL[OII]Limit flag on logL[OII]charlogL[OII]? [O II]{lambda}3727 line luminositylog(1e-07W)floatnullablel_EWHbLimit flag on EWHbcharEWHb? H{beta}{lambda}4861 rest frame equivalent width0.1nmfloatnullablel_logLHbLimit flag on logLHbcharlogLHb? H{beta}{lambda}4861 line luminositylog(1e-07W)floatnullablel_EW[OIII]Limit flag on EW[OIII]charEW[OIII]? [O III]{lambda}5007 rest frame equivalent width0.1nmfloatnullablel_logL[OIII]Limit flag on logL[OIII]charlogL[OIII]? [O III]{lambda}5007 line luminositylog(1e-07W)floatnullablel_EWHaLimit flag on EWHacharEWHa? H{alpha}{lambda}6563 rest frame equivalent width0.1nmfloatnullablelogLHa? H{alpha}{lambda}6563 line luminositylog(1e-07W)floatnullablel_LNLRLimit flag on LNLRcharLNLR? Narrow-line region luminosity (G2)log(1e-07W)floatnullablel_LBLRLimit flag on LBLRcharLBLR? Broad-line region luminosity (G2)log(1e-07W)floatnullablen_LBLR[*] Note on LBLR (3)charCaH+K? CaH&K break value (G3)floatnullablee_CaH+K? rms uncertainty on CaH&KfloatnullableSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/351/83/table4DXRBS radio galaxiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intNameObject Name (G1)charzRedshiftfloatl_EW[OII]Limit flag on EW[OII]charEW[OII]? [O II] rest frame equivalent width0.1nmfloatnullablel_logL[OII]Limit flag on logL[OII]charlogL[OII]? [O II] line luminositylog(1e-07W)floatnullablel_EW[OIII]Limit flag on EW[OIII]charEW[OIII]? [O III] rest frame equivalent width0.1nmfloatnullablel_logL[OIII]Limit flag on logL[OIII]charlogL[OIII]? [O III] line luminositylog(1e-07W)floatnullablel_LNLRLimit flag on LNLRcharLNLRNarrow-line region luminositylog(1e-07W)floatCaH+K? CaH&K break value (G3)floatnullablee_CaH+K? rms uncertainty on CaH&KfloatnullableDXRBSDisplay the data from the DXRBS (J/AJ/115/1253 and J/MNRAS/323/757)charSimbadSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main