XQ-100 survey neutral gas J/MNRAS/456/4488 ivo://CDS.VizieR/J/MNRAS/456/4488 doi:10.26093/cds/vizier.74564488 CDS Sanchez-Ramirez R. Ellison S.L. Prochaska J.X. Berg T.A.M. Lopez S.,D'odorico V. Becker G.D. Christensen L. Cupani G. Denney K.D.,Paris I. Worseck G. Gorosabel J. 2024-08-15T20:17:44Z 2017-03-06T13:14:20Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr quasars redshifted chemical-abundances We present a sample of 38 intervening damped Lyman {alpha} (DLA) systems identified towards 100 z>3.5 quasars, observed during the XQ-100 survey. The XQ-100 DLA sample is combined with major DLA surveys in the literature. The final combined sample consists of 742 DLAs over a redshift range approximately 1.6<z_abs_<5.0. We develop a novel technique for computing {Omega}_HI_^DLA^ as a continuous function of redshift, and we thoroughly assess and quantify the sources of error therein, including fitting errors and incomplete sampling of the high column density end of the column density distribution function. There is a statistically significant redshift evolution in {Omega}_HI_^DLA^ (>=3{sigma}) from z~2 to z~5. In order to make a complete assessment of the redshift evolution of {Omega}_HI_, we combine our high-redshift DLA sample with absorption surveys at intermediate redshift and 21-cm emission line surveys of the local universe. Although {Omega}_HI_^DLA^, and hence its redshift evolution, remains uncertain in the intermediate-redshift regime (0.1<z_abs_<1.6), we find that the combination of high-redshift data with 21-cm surveys of the local universe all yield a statistically significant evolution in {Omega}_HI_ from z~0 to z~5 (>=3{sigma}). Despite its statistical significance, the magnitude of the evolution is small: a linear regression fit between {Omega}_HI_ and z yields a typical slope of ~0.17x10^-3^, corresponding to a factor of ~4 decrease in {Omega}_HI_ between z=5 and z=0. 2016MNRAS.456.4488S https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/456/4488 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/456/4488 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/456/4488 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/456/4488 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/456/4488 https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/456/4488 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/456/4488 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/MNRAS/456/4488/table5 (Combined sample catalogue) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/456/4488/table5? https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/456/4488/table5? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/456/4488/table5? 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28119 28160 28165 28177 28179 28181-28182 28184-28185 28187 28189-28190 28193-28195 28197-28198 28201-28202 28208 28210 28225-28226 28294 28312 28332 28383 28401 28419 28511 28530 28533 28536-28537 28539 28542 28560 28567 28572 28587 28590-28591 28593-28596 28605-28607 28610-28612 28614 28616-28618 28621-28624 28626-28630 28632-28634 28636-28638 28644 28646-28649 28651-28652 28654-28658 28660 28662-28664 28667-28669 28671 29795 30029 30031 30035-30037 30040 30836 31176 31289 31291 31294 31313 31336 31355 31374-31375 31384 31393 31395 31402-31403 31408 31419-31420 31422-31423 31436 31444 31449 31451 31453-31454 31458 31474-31475 31529 31546 31620 31622-31623 31625 31628-31629 31631 31652 31656 31659 31685 31687 31697 31699 31706 32397 32399 32408 32411 32414-32415 32429-32430 32434 32438-32440 32442-32443 32456 32460 32466 32482 32488-32489 32492 32497 32499 32502-32503 32510-32511 32680 32746 33269 33597 33746 34262 34271 34375 34501 34503 34512 34570 34809 34850 35002 35241 35583 35737 35748-35749 35751-35752 35754 35759 35762 35764-35765 35770-35772 35952 36090 36101 36130 36217 36241 36260 36268 36271 36320 36445 36466 36522 36648 36725 36727-36728 36734 36764 36766-36767 36778 36781-36786 36790 36792 36802-36803 36805-36806 36809-36810 36816 36834 36863 37533 40527 43983 45039 45047 45049 45052 45055 45460 46390 46398 46637 46651 46722 46724 46728 46731 46737 46739-46740 46746 46753 46864 47941 48166 48460 48462-48463 48474-48475 48482 48498 48610 48990 49016 49019 49078 49086 49094 49097-49098 49100-49101 49103 49106 49121 49124 49128-49129 49151 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/456/4488?format=ascii Optical default J/MNRAS/456/4488/table1 XQ-100 DLA catalog SimbadName Simbad column added by the CDS meta.id char n_Name [ABC ] Note on Name (1) meta.note char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name XQ-100 name (JHHMM+DDMM) meta.id;meta.main char zem ? Emission redshift src.redshift float nullable zmin ? Minimum redshift range src.redshift float nullable zmax ? Maximum redshift range src.redshift float nullable zabs ? Absorption redshift src.redshift float nullable logN(HI) ? HI column density log(cm**-2) phys.columnDensity float nullable e_logN(HI) ? rms uncertainty on logN(HI) log(cm**-2) stat.error float nullable Lines Lines covered meta.note
J/MNRAS/456/4488/table5 Combined sample catalogue SimbadName Simbad column added by the CDS meta.id char RAJ2000 Rigth ascension (J2000) deg pos.eq.ra;meta.main recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int QSO QSO name meta.id;meta.main char DEJ2000 Declination (J2000) deg pos.eq.dec;meta.main zem ? Emission redshift src.redshift float nullable zmin ? Minimum redshift range src.redshift float nullable zmax ? Maximum redshift range src.redshift float nullable zabs ? Absorption redshift src.redshift float nullable logN(HI) ? HI column density log(cm**-2) phys.columnDensity float nullable e_logN(HI) ? rms uncertainty on logN log(cm**-2) stat.error float nullable NED Simbad column added by the CDS meta.ref.url char