J/A+A/620/A118ivo://CDS.VizieR/J/A+A/620/A118doi:10.26093/cds/vizier.36200118CDSNegrete C.A.Dultzin D.Marziani P.Esparza D.Sulentic J. W.,del Olmo A.Martinez-Aldama M. L.Garcia-Lopez A.D'Onofrio MBon N.Bon E.2019-01-07T09:33:16Z2018-12-06T08:19:00ZCDS support team

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

cds-question@unistra.frsurveysquasarsredshiftedspectroscopyThe most highly accreting quasars are of special interest in studies of the physics of active galactic nuclei (AGNs) and host galaxy evolution. Quasars accreting at high rates (L/LEdd~1) hold promise for use as "standard candles": distance indicators detectable at very high redshift. However, their observational properties are still largely unknown. We seek to identify a significant number of extreme accretors. A large sample can clarify the main properties of quasars radiating near L/LEdd~1 (in this paper they are designated as extreme Population A quasars or simply as extreme accretors) in the H{beta} spectral range for redshift <~0.8. We use selection criteria derived from four-dimensional Eigenvector 1 (4DE1) studies to identify and analyze spectra for a sample of 334 candidate sources identified from the SDSS DR7 database. The source spectra were chosen to show a ratio R_FeII_ between the FeII emission blend at {lambda}4570 and H{beta}, R_FeII_ > 1. Composite spectra were analyzed for systematic trends as a function of FeII strength, line width, and [OIII] strength. We introduced tighter constraints on the signal-to-noise ratio (S/N) and R_FeII_ values that allowed us to isolate sources most likely to be extreme accretors. We provide a database of detailed measurements. Analysis of the data allows us to confirm that H{beta} shows a Lorentzian function with a full width at half maximum (FWHM) of H{beta}<=4000km/s. We find no evidence for a discontinuity at 2000km/s in the 4DE1, which could mean that the sources below this FWHM value do not belong to a different AGN class. Systematic [OIII] blue shifts, as well as a blueshifted component in H{beta} are revealed. We interpret the blueshifts as related to the signature of outflowing gas from the quasar central engine. The FWHM of H{beta} is still affected by the blueshifted emission; however, the effect is non-negligible if the FWHM H{beta} is used as a "virial broadening estimator" (VBE). We emphasize a strong effect of the viewing angle on H{beta} broadening, deriving a correction for those sources that shows major disagreement between virial and concordance cosmology luminosity values. The relatively large scatter between concordance cosmology and virial luminosity estimates can be reduced (by an order of magnitude) if a correction for orientation effects is included in the FWHM H{beta} value; outflow and sample definition yield relatively minor effects.2018A&A...620A.118Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/620/A118CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/620/A118https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/620/A118http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/620/A118https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/620/A118https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/620/A118http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/620/A118GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/620/A118/table1 (Objects with an erroneous z identification)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/620/A118/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/620/A118/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/620/A118/table1?GETtext/xml+votable180.050000true44.3679167-0.86186110.005555555555555556Cone search capability for table J/A+A/620/A118/table2 (Measurements of the individual spectral fits)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/620/A118/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/620/A118/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/620/A118/table2?GETtext/xml+votable180.050000true1.045-10.75752780.0055555555555555566/4097 4135 4141 4153-4154 4226 4229 4295 4298 4306 4346 4403 4471 4487 4502 4509 4539 4601 4606 4624 4629-4630 4640 4677 4690 4693 4696 4700 4718 4720 4761 4787 4797 4821 4826 4848 4879 4902 4933 4966 4974 4979 4992 5034 5049-5050 5052 5054 5062 5108 5117 5144 5180 5205-5206 5212 5215 5233 5239 5256 5267 5274 5292 5299 5304-5305 5307 5328 5343 5371 5435 5438 5455 5496 5504 5515 5529 5534 5555 5605 5623 5647 5670-5671 5706 5746 5776 5808 5995 6007 6009 6033 6054 6061 6065 6095 6097 6124 6128 6131 6244-6245 6256 6267 6352 6357 6430 6441 6462 6470-6471 6473 6475 6492 6503 6546 6572 6625 6643 6918 7170 7173 7241 7280 7314 7327 7362 7368 7438 7447 7462 7554 7604 8275 8283 8309 8323 8463 8474 8496 8501 8516 8518 8606 8669-8670 8731 8751 8755 8794 8809 8864 8896 8906 8965 9110 9187 9200 9212 9242 9283 9362 9370 9387 9400 9607-9608 9633 9736 9743 9770 9849 9907 9941 9962 9995 10025 10075 10094 10188 10260 10311 10330 10345 10392 10403 10443 10455 10481 10521 10580 10603 10616 10657 10687 10703 10707 10761 10764 10781 10828 10839 10879 10881 10899 10918 10920 10950 10957 10959 10964 10975 11042 11061-11062 11065 11135 11174 11181 11198 11216-11217 11291 11384 11435 11455 11513 11828 11839 11854 11911 11918 11944 11954-11955 12401 17213 17318 17497 17509 17560 17665 17743 17749-17750 17762-17763 17770-17773 17776 17819 17826 18004 18012-18013 18027 18067 18069-18070 18089 18096 18112 18388 18392 18403 18617 18771 18776 18785-18786 18788 18838 18850-18851 18859 19030 19046 19136 19202 19407 19417 19696 19734 19755 20033 21997 23076 23102 23209 23216 23418 25597 25915 25925 25980 25987 25992 26011 26064 26069 26103 26111 26181 26209 26228 26233 26259 26297 26334 26356 26369 26378 26395 26414 26475 26477 26481 26529-26530 26546 26552 26558 26582-26583 26600 26608 26952 26960 27075 27080 27228 27309 27322 27351 27367 27510 27522 27686 27688 27702 27726 27760 27816 27823 27836 27963 27994 28068 28113 28154 28164 28170 28197-28198 28202 28209 28308 28347 28351 28407 28453 28574 28576 28602 28607 28659 30033 30042 31339 31389 31440 31473 31631 31688 31728 32492 32511 36802-36803 36862 49013 49017 490943.8949892233750168e-19 3.8949892233750168e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/620/A118?format=asciidefaultJ/A+A/620/A118/table1Objects with an erroneous z identificationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS Namemeta.id;meta.maincharzSDSSSDSS DR7 redshiftsrc.redshift;pos.heliocentricdoublee_zSDSSSDSS redshift errorstat.errordoublezShenShen et al. (2011, Cat. J/ApJS/194/45) redshiftsrc.redshift;pos.heliocentricdoublezHWHewitt & Wilde (2010, Cat. J/MNRAS/405/2302) redshiftsrc.redshift;pos.heliocentricdoubleSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS name (declination part)degpos.eq.dec;meta.mainJ/A+A/620/A118/table2Measurements of the individual spectral fitsC010H{beta} centroid at 0.10 of the line intensitykm/sspect.line.broadinte_RFeIIRFeII errorstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS DR7 designationmeta.id;meta.maincharzRedshift considered in this work (1)src.redshift;pos.heliocentricdoublee_zRedshift errorstat.error;src.redshiftdoublezSDSSRedshift SDSS DR7src.redshift;pos.heliocentricdoublee_zSDSSRedshift SDSS DR7 errorstat.errordoubleS/NS/N ratio measured around 5100{AA}stat.snrfloatC5100Continuum flux at 5100{AA} in 10^-17^erg/cm^2^/s/{AA}1e-19W.m**-2.nm**-1phot.flux.density;em.optfloate_C5100Continuum flux at 5100{AA} error1e-19W.m**-2.nm**-1stat.errorfloatN5100Continuum normalization at 5100{AA}phot.flux;arith.ratiofloate_N5100Continuum normalization at 5100{AA} errorstat.errorfloatalphaPower law indexspect.indexfloate_alphaPower law index errorstat.error;pos.eq.rafloatFaintHGFaint contribution of the HGmeta.noteintFHbBCH{beta}_BC_ line flux in 10^-17^erg/cm^2^/s1e-20W.m**-2phot.flux;em.line.Hbetadoublee_FHbBCH{beta}_BC_ line flux error1e-20W.m**-2stat.errorfloatEWHbBCH{beta}_BC_ rest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWHbBCH{beta}_BC_ rest-frame equivalent width error0.1nmstat.errorfloatShiftHbBCH{beta}_BC_ shift with respect to the rest-framekm/sstat.fit.paraminte_ShiftHbBCH{beta}_BC_ shift with respect to the rest-frame errorkm/sstat.errorfloatFWHMHbBCH{beta}_BC_ FWHMkm/sspect.line.widthdoublee_FWHMHbBCH{beta}_BC_ FWHM errorkm/sstat.errordoubleHbprofile[GL] G = Gaussian, L = Lorentzianmeta.codecharFHbblueH{beta}BLUE Line Flux1e-20W.m**-2phot.flux;em.line.Hbetafloate_FHbblueH{beta}BLUE Line Flux error1e-20W.m**-2stat.errorfloatEWHbblueH{beta}BLUE rest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWHbblueH{beta}BLUE rest-frame equivalent width error0.1nmstat.errorfloatShiftHbblueH{beta}BLUE shiftkm/sstat.fit.paramdoublee_ShiftHbblueH{beta}BLUE shift errorkm/sstat.errorfloatFWHMHbblueH{beta}BLUE FWHMkm/sspect.line.widthinte_FWHMHbblueH{beta}BLUE FWHM errorkm/sstat.errorintFFeIIFeII flux1e-20W.m**-2phot.fluxdoublee_FFeIIFeII flux error1e-20W.m**-2stat.errorfloatEWFeIIFeII rest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWFeIIFeII rest-frame equivalent width error0.1nmstat.errorfloatPopPopulation designationmeta.codecharRFeIIRatio between the FeII emission blend at {lambda}4570 and H{beta}spect.line.eqWidthfloatAIHbH{beta} asymetry (only objects with Hbblue)src.morph.paramfloate_AIHbH{beta} asymetry errorstat.errorfloatKurtKurtosisstat.fit.paramfloate_KurtKurtosis errorstat.errorfloate_C010H{beta} centroid at 0.10 of the line intensity errorkm/sstat.errorintC025H{beta} centroid at 0.25 of the line intensitykm/sspect.line.broadinte_C025H{beta} centroid at 0.25 of the line intensity errorkm/sstat.errorintC050H{beta} centroid at 0.50 of the line intensitykm/sspect.line.broadinte_C050H{beta} centroid at 0.50 of the line intensity errorkm/sstat.errorintC075H{beta} centroid at 0.75 of the line intensitykm/sspect.line.broadinte_C075H{beta} centroid at 0.75 of the line intensity errorkm/sstat.errorintC090H{beta} centroid at 0.90 of the line intensitykm/sspect.line.broadinte_C090H{beta} centroid at 0.90 of the line intensity errorkm/sstat.errorintFHeIIHeII line flux1e-20W.m**-2phot.fluxfloate_FHeIIHeII line flux error1e-20W.m**-2stat.errorfloatShiftHeIIHeII shift with respect to the rest framekm/sstat.fit.paramdoublee_ShiftHeIIHeII shift with respect to the rest frame errorkm/sstat.errorfloatFWHMHeIIHeII FWHMkm/sspect.line.widthinte_FWHMHeIIHeII FWHM errorkm/sstat.errorintFHbNCH{beta}_NC_ Line Flux1e-20W.m**-2phot.flux;em.line.Hbetafloate_FHbNCH{beta}_NC_ Line Flux error1e-20W.m**-2stat.errorfloatEWHbNCH{beta}_NC_ rest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWHbNCH{beta}_NC_ rest-frame equivalent width error0.1nmstat.errorfloatShiftHbNCH{beta}_NC_ shift with respect to the rest-framekm/sstat.fit.paraminte_ShiftHbNCH{beta}_NC_ shift with respect to the rest-frame errorkm/sstat.errorfloatFWHMHbNCH{beta}_NC_ FWHMkm/sspect.line.widthinte_FWHMHbNCH{beta}_NC_ FWHM errorkm/sstat.errorintFOIIILine flux of [OIII] 50071e-20W.m**-2phot.fluxfloate_FOIIILine flux error of [OIII] 50071e-20W.m**-2stat.errorfloatEWOIIILine [OIII] 5007 rest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWOIIILine [OIII] 5007 rest-frame equivalent width error0.1nmstat.errorfloatShiftOIIILine [OIII] 5007 shift with respect to the rest-framekm/sstat.fit.paramdoublee_ShiftOIIILine [OIII] 5007 shift with respect to the rest-frame errorkm/sstat.errorfloatFWHMOIIILine [OIII] 5007 FWHMkm/sspect.line.widthinte_FWHMOIIILine [OIII] 5007 FWHM errorkm/sstat.errorintFOIIISBSemi broad line [OIII] 5007 flux1e-20W.m**-2phot.fluxfloate_FOIIISBSemi broad line [OIII] 5007 flux error1e-20W.m**-2stat.errorfloatEWOIIISBSemi broad line [OIII] 5007 rest-frame equivalent width0.1nmspect.line.eqWidthfloate_EWOIIISBSemi broad line [OIII] 5007 rest-frame equivalent width error0.1nmstat.errorfloatShiftOIIISBSemi broad line [OIII] 5007 shift with respect to the rest framekm/sstat.fit.paramdoublee_ShiftOIIISBSemi broad line [OIII] 5007 shift with respect to the rest frame errorkm/sstat.errorfloatFWHMOIIISBSemi broad line [OIII] 5007 FWHMkm/sspect.line.widthinte_FWHMOIIISBSemi broad line [OIII] 5007 FWHM errorkm/sstat.errorintlogMBHBlack hole masslog(solMass)phys.massfloate_logMBHBlack hole mass errorlog(solMass)stat.errorfloatlogLBolBolometric luminositylog(solLum)phys.luminosityfloate_logLBolBolometric luminosity errorlog(solLum)stat.errorfloatL/LEddEddington ratiophys.luminosity;arith.ratiofloate_L/LEddEddington ratio errorstat.errorfloatSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SDSS name (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS name (declination part)degpos.eq.dec;meta.main