J/ApJ/679/962ivo://CDS.VizieR/J/ApJ/679/962doi:10.26093/cds/vizier.16790962CDSJiang L.Fan X.Vestergaard M.2017-10-03T05:12:51Z2010-10-22T07:57:54ZCDS support team

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

cds-question@unistra.frquasarsspectroscopyWe report on 293 quasars with strong NIV] {lambda}1486 or NIII] {lambda}1750 emission lines (rest-frame equivalent width >3{AA}) at 1.7<z<4.0 selected from the Sloan Digital Sky Survey (SDSS) Fifth Data Release (Cat. VII/252). These nitrogen-rich (N-rich) objects comprise ~1.1% of the SDSS quasars. The comparison between the N-rich quasars and other quasars shows that the two quasar subsets share many common properties. We also confirm previous results that N-rich quasars have much stronger Ly{alpha} and NV {lambda}1240 emission lines. Strong nitrogen emission in all ionization states indicates high overall nitrogen abundances in these objects. We find evidence that the nitrogen abundance is closely related to quasar radio properties.2008ApJ...679..962Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/679/962CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/ApJ/613/129 : Equivalent widths of QSOs (Wise+, 2004)J/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/679/962https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/679/962http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/679/962https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/679/962https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/679/962http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/679/962GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/679/962/table1 (SDSS DR5 N-rich quasar catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/679/962/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/679/962/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/679/962/table1?GETtext/xml+votable180.050000true190.137333367.8030.0055555555555555566/4099 4100 4133 4179 4180 4225 4230 4232 4237 4353 4714 4752 4785 4789 4792 4801 4815 4843 4848 4851 4915 4950 4960 4982 4988 5028 5101 5105 5112 5210 5240 5309 5315 5332 5343 5360 5363 5421 5441 5471 5491 5513 5528 5530 5546 5638 5656 5666 5671 5676 5706 5708 5721 5751 5771 5783 5802 5822 5834 5864 5874 5876 5882 5931 5951 6026 6067 6121 6123 6220 6243 6269 6355 6359 6415 6464 6469 6490 6512 6551 6554 6566 6569 6608 7204 7219 7225 7229 7248 7367 7377 7380 7388 7443 7472 7492 7493 7495 7505 7526 8192 8347 8378 8575 8702 9178 9203 9227 9232 9259 9282 9355 9359 9404 9441 9472 9601 9632 9729 9730 9733 9799 9866 9883 9884 9890 9978 10017 10113 10144 10306 10354 10430 10513 10591 10612 10617 10625 10657 10708 10709 10799 10814 10841 10976 10986 11075 11163 11234 11262 11283 11303 11337 11345 11350 11353 11356 11374 11379 11418 11424 11433 11463 11475 11489 11589 11596 11777 11794 11833 11851 11910 11922 11938 11949 11953 17264 17293 17295 17321 17405 17498 17502 17518 17556 17751 17752 17764 17820 17841 17983 18385 18388 18625 18800 18829 18858 19417 19420 19675 19687 19735 19748 19981 20034 21879 21885 21952 22003 22005 22007 22010 22717 23059 23182 23192 23201 25844 25851 25919 25987 26012 26057 26083 26191 26211 26269 26309 26368 26373 26408 26448 26459 26547 26594 26946 26977 26993 26994 27053 27109 27122 27303 27308 27326 27367 27378 27417 27427 27570 27591 27674 27676 27690 27717 27780 27781 27879 27913 27928 27939 27943 27948 28033 28162 28167 28169 28174 28181 28183 28192 28614 28615 28632 28637 28662 31316 31388 31419 31431 31620 32458 32480 36816 45047 45052 450552.381800341673347e-19 2.821731604724377e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/679/962?format=asciiOpticaldefaultJ/ApJ/679/962/table1SDSS DR5 N-rich quasar catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSQuasar identification (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharzSDSS redshiftsrc.redshiftfloatimagSDSS i band magnitude, corrected for Galactic extinction.magphot.mag;em.opt.IfloatalphaPower-law continuum slopespect.indexfloat[NIV]? [NIV] (1486) equivalent width0.1nmspect.line.eqWidthfloatnullable[NIII]? [NIII] (1750) equivalent width0.1nmspect.line.eqWidthfloatnullableSiIV? SiIV (1396) equivalent width0.1nmspect.line.eqWidthfloatnullableCIV? CIV (1549) equivalent width0.1nmspect.line.eqWidthfloatnullable[CIII]? [CIII] (1909) equivalent width0.1nmspect.line.eqWidthfloatnullableMgII? MgII (2800) equivalent width0.1nmspect.line.eqWidthfloatnullableFe/Mg? The FeII/MgII ratiospect.line.intensity;arith.ratiofloatnullable2500MAGAbsolute AB mag at rest-frame 2500{AA}magphys.magAbsfloatR? Radio loudness (2)phot.flux;arith.ratiofloatnullableqso7SDSS-DR7 data from Schneider et al. 2010 (Cat. VII/260) for this quasarmeta.ref.urlcharSloanDisplay the SDSS data for this quasarmeta.ref.urlcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_RAPosition, derived from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPosition, derived from SDSS name (declination part)degpos.eq.dec;meta.main