Metals in SDSS QSOs. I. 1.5<z<4.5 CIV absorbers J/ApJ/763/37 ivo://CDS.VizieR/J/ApJ/763/37 doi:10.26093/cds/vizier.17630037 CDS Cooksey K.L. Kao M.M. Simcoe R.A. O'Meara J.M. Prochaska J.X. 2017-10-12T13:00:29Z 2014-10-29T08:19:30Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr quasars redshifted line-intensities We have vastly increased the CIV statistics at intermediate redshift by surveying the thousands of quasars in the Sloan Digital Sky Survey (SDSS) Data-Release 7. We visually verified over 16000 CIV systems with 1.46<z<4.55 - a sample size that renders Poisson error negligible. Detailed Monte Carlo simulations show that we are approximately 50% complete down to rest equivalent widths W_r_{approx}0.6{AA}. We analyzed the sample as a whole and in 10 small redshift bins with approximately 1500 doublets each. The equivalent width frequency distributions f(W_r_) were well modeled by an exponential, with little evolution in shape. In contrast with previous studies that modeled the frequency distribution as a single power law, the fitted exponential gives a finite mass density for the CIV ions. The comoving line density dN_CIV_/dX evolved smoothly with redshift, increasing by a factor of 2.37+/-0.09 from z=4.55-1.96, then plateauing at dN_CIV_/dX~0.34 for z=1.96-1.46. Comparing our SDSS sample with z<1 (ultraviolet) and z>5 (infrared) surveys, we see an approximately 10-fold increase in dN_CIV_/dX over z{approx}6->0, for W_r_>=0.6{AA}. This suggests a monotonic and significant increase in the enrichment of gas outside galaxies over the 12Gyr lifetime of the universe. 2013ApJ...763...37C https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/763/37 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to VII/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/ApJ/761/112 : High-redshift MgII absorption QSOs with FIRE (Matejek+, 2012) J/ApJ/728/23 : GALEX UV-bright high-redshift quasars (Worseck+, 2011) J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011) J/ApJS/193/28 : Galaxy survey around 20 UV-bright quasars (Prochaska+, 2011) J/AJ/142/122 : SDSS DR7 galaxy/QSOs pairs (Cherinka+, 2011) J/ApJ/718/392 : SDSS Lyman limit systems at z~3.5 (Prochaska+, 2010) J/ApJ/714/1521 : Spectroscopy of galaxies around distant QSOs (Chen+, 2010) J/ApJ/708/868 : CIV candidates (Cooksey+, 2010) J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010) J/MNRAS/401/2715 : CIV column densities in z<2.5 QSOs (D'odorico+, 2010) J/ApJ/699/782 : High-redshift SDSS-DR5 QSOs (Diamond-Stanic+, 2009) J/ApJ/679/194 : Low-z intergalactic medium. III. (Danforth+, 2008) J/ApJ/666/757 : CIV 1549{AA} emission line in AGNs (Sulentic+, 2007) J/A+A/473/791 : CIV absorption in DLAs and sub-DLAs systems (Fox+, 2007) J/ApJ/641/78 : CIV variability in 105 SDSS quasars (Wilhite+, 2006) J/ApJ/639/766 : SDSS-DR3 strong MgII absorbers (Prochter+, 2006) J/ApJ/635/123 : The SDSS-DR3 damped Ly{alpha} survey (Prochaska+, 2005) J/ApJ/596/768 : Optical depths in 19 QSOs (Schaye+, 2003) J/A+A/283/759 : CIV QSO absorption systems (Petitjean+ 1994) https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/763/37 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/763/37 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/763/37 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/763/37 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/763/37 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/763/37 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/763/37/table2 (Sightline summary) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/763/37/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/763/37/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/763/37/table2? GET text/xml+votable 180.0 50000 true 0.0390833 13.9384444 0.005555555555555556 3/138 440 4/256 258 260 264 267 270 272 279 280 281 285 287 288 291 293 295 299 300 301 309 311 315 316 318 319 320 322 324 325 326 328 330 332 333 335 337 338 347 350 353 357 361 362 369 377 382 383 399 403 411 415 452 453 460 466 467 468 521 522 525 526 528 532 545 549 564 565 568 571 572 576 577 578 589 591 594 611 614 623 640 642 646 647 651 652 658 659 664 669 676 685 689 690 692 695 696 698 699 701 704 706 708 710 714 715 716 718 740 1621 1627 1629 1643 1644 1648 1649 1651 1653 1662 1685 1695 1708 1730 1731 1732 1734 1736 1737 1747 1748 1751 1752 1753 1755 1756 1758 1759 1770 1772 1777 1780 1781 1785 1786 1788 1791 1976 1978 1979 5/12 136 178 518 523 551 1028 1030 1031 1036 1037 1044 1045 1046 1048 1050 1051 1052 1054 1060 1062 1064 1066 1067 1073 1074 1075 1077 1078 1085 1086 1087 1094 1095 1096 1097 1099 1101 1102 1103 1105 1106 1107 1108 1110 1111 1112 1129 1133 1134 1135 1136 1137 1145 1146 1147 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32698 32700 36717 36718 36719 36722 36723 36725 36726 36727 36728 36730 36731 36732 36734 36759 36761 36773 36774 36777 36778 36779 36788 36790 36792 36793 36794 36804 36805 36806 36812 36816 36817 36832 36861 36862 36863 40959 45039 45052 45054 45055 48989 48990 49007 49009 49010 49011 49012 49013 49014 49022 49077 49078 49079 49085 49086 49087 49093 49094 49095 49097 49098 49099 49100 49102 49103 49105 49106 49121 49122 49123 49124 49126 49128 49129 49130 49150 49151 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/763/37?format=ascii Optical default J/ApJ/763/37/table2 Sightline summary SDSS SDSS-DR7 QSO IAU name from Cat. VII/260 meta.id char f_QSO [0/12] Binary BAL flag (1) meta.code int recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int QSO Adopted MJD-plate-fiber QSO identifier (G1) meta.id;meta.main char primary RAJ2000 Hour of Right Ascension (J2000) (G2) pos.eq.ra;meta.main indexed DEJ2000 Degree of Declination (J2000) (G2) pos.eq.dec;meta.main zQSO [1.7/5.4] QSO redshift (G2) src.redshift;pos.heliocentric float <S/N> [4/77] Median signal-to-noise in the region searched for CIV pixel**-1 stat.snr float dXmax [0.6/4] Maximum co-moving pathlength available (2) src.redshift;arith.diff float N [0/18] Number of candidate CIV doublets meta.number int NCIV [0/7] Number of confirmed CIV doublets (table3) meta.number int dXCIV [0.02/0.42]? Pathlength blocked by NCIV doublets (2) src.redshift;arith.diff float nullable DR7 Display the SDSS-DR7 photometric data (Cat. II/294) for this quasar meta.ref.url char Sloan Display the SDSS online data for the nearest object meta.ref.url char Sloan_sp Display the SDSS online spectrum data for this quasar meta.ref.url char Simbad Simbad column added by the CDS meta.ref.url char NED Simbad column added by the CDS meta.ref char
J/ApJ/763/37/table3 CIV system summary recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Code [1/3] System code (1) meta.code int QSO Adopted MJD-plate-fiber QSO identifier (G1) meta.id;meta.main char zQSO [1.7/4.9] QSO redshift (G2) src.redshift;pos.heliocentric float zCIV [1.4/4.6] CIV-1548{AA} line redshift spect.dopplerVeloc double W1548 [0/5.4] Rest equivalent width of 1548 line 0.1nm spect.line.eqWidth float e_W1548 [0/1.3] Uncertainty in W1548 0.1nm stat.error float W1550 [0/5.6] Rest equivalent width of 1550 line 0.1nm spect.line.eqWidth float e_W1550 [0/1.3] Uncertainty in W1550 0.1nm stat.error float CW1548 [0/1] Completeness fraction (2) meta.note float e_CW1548 [0/0.3] Uncertainty in CW1548 stat.error float l_logCIV [<>?] Limit flag on logCIV (3) meta.code.error char logCIV [12.8/15.5]? Log CIV column density (4) log(cm**-2) phys.columnDensity float nullable e_logCIV [0/1.1] Uncertainty in logCIV log(cm**-2) stat.error float f_logCIV [1/19] Binary column density flag (5) meta.code int