J/MNRAS/335/555ivo://CDS.VizieR/J/MNRAS/335/555doi:10.26093/cds/vizier.73350555CDSKim T.-S.Carswell R.F.Cristiani S.D'odorico S.Giallongo E.2024-06-28T20:16:50Z2005-02-07T23:06:23ZCDS support team

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

cds-question@unistra.frquasarsCombining a new, increased data set of eight quasi-stellar objects (QSOs) covering the Ly{alpha} forest at redshifts 1.5<z<3.6 from VLT/UVES observations with previously published results, we have investigated the properties of the Ly{alpha} forest at 1.5<z<4. With the six QSOs covering the Ly{alpha} forest at 1.5<z<2.5, we have extended previous studies in this redshift range. In particular, we have concentrated on the evolution of the line number density and the clustering of the Ly{alpha} forest at z<=2.5, where the Ly{alpha} forest starts to show some inhomogeneity from sightline to sightline. We have fitted Voigt profiles to the Ly{alpha} absorption lines as in previous studies, and have, for two QSOs with z_em_~2.4, fitted Ly{alpha} and higher order of Lyman lines down to 3050{AA} simultaneously. This latter approach has been taken in order to study the Ly{beta} forest at z~2.2 and the higher H I column density Ly{alpha} forest in the Ly{beta} forest region.2002MNRAS.335..555Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/335/555CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/373/757 : Lyman-Alpha Forest of 3 QSOs (Kim+, 2001)J/ApJ/524/536 : Nearby Ly{alpha} quasar absorbers (Impey+, 1999)J/other/PASA/19.455 : Damped Lyman alpha absorption of QSOs (Curran+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/335/555https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/335/555http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/335/555https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/335/555https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/335/555http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/335/555GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/335/555/table1 (Observation log)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/335/555/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/335/555/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/335/555/table1?GETtext/xml+votable180.050000true79.281667-44.1822220.0055555555555555566/16656 23210 25120 25285 34107 43903 45526 47007https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/335/555?format=asciiOpticaldefaultJ/MNRAS/335/555/table1Observation logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intQSOQSO namecharRAJ2000Right Ascension J2000 (hours) (2)pos.eq.ra;meta.mainDEJ2000Declination J2000 (degrees) (2)pos.eq.dec;meta.mainBmagB magnitude (1)magfloatzemEmission redshiftfloatLambdaLLower value of wavelength intervalnmfloatLambdaUUpper value of wavelength intervalnmfloatExpTimeExposition timesintDateObservation datecharFileName of file containing the line list.charSimbadSimbad column added by the CDScharNEDSimbad column added by the CDScharJ/MNRAS/335/555/q0055Fitted line list for Q0055-269ComCommentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intLineLine number (1)intLambdaVacuum wavelength0.1nmdoubleIonLine identificationcharzRedshift of the linedoublebDoppler parameter (b-parameter)km/sfloate_brms uncertainty on bkm/sfloatlog(NHI)Logarithmic value of HI column densitylog(cm**-2)floate_log(NHI)rms uncertainty on log(NHI)log(cm**-2)floatJ/MNRAS/335/555/q0302Fitted line list for Q0302-003recnoRecord number assigned by the VizieR team. Should Not be used for identification.intLineLine number (1)intLambdaVacuum wavelength0.1nmdoubleIonLine identificationcharzRedshift of the linedoublebDoppler parameter (b-parameter)km/sfloate_brms uncertainty on bkm/sfloatlog(NHI)Logarithmic value of HI column densitylog(cm**-2)floate_log(NHI)rms uncertainty on log(NHI)log(cm**-2)floatComCommentcharJ/MNRAS/335/555/q1101Fitted line list for Q1101-264recnoRecord number assigned by the VizieR team. Should Not be used for identification.intLineLine number (1)intLambdaVacuum wavelength0.1nmdoubleIonLine identificationcharzRedshift of the linedoublebDoppler parameter (b-parameter)km/sfloate_brms uncertainty on bkm/sfloatlog(NHI)Logarithmic value of HI column densitylog(cm**-2)floate_log(NHI)rms uncertainty on log(NHI)log(cm**-2)floatComCommentcharJ/MNRAS/335/555/q1122Fitted line list for HE1122-1648ComCommentcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.intLineLine number (1)intLambdaVacuum wavelength0.1nmdoubleIonLine identificationcharzRedshift of the linedoublebDoppler parameter (b-parameter)km/sfloate_brms uncertainty on bkm/sfloatlog(NHI)Logarithmic value of HI column densitylog(cm**-2)floate_log(NHI)rms uncertainty on log(NHI)log(cm**-2)floatJ/MNRAS/335/555/q1347Fitted line list for HE1347-2457recnoRecord number assigned by the VizieR team. Should Not be used for identification.intLineLine number (1)intLambdaVacuum wavelength0.1nmdoubleIonLine identificationcharzRedshift of the linedoublebDoppler parameter (b-parameter)km/sfloate_brms uncertainty on bkm/sfloatlog(NHI)Logarithmic value of HI column densitylog(cm**-2)floate_log(NHI)rms uncertainty on log(NHI)log(cm**-2)floatComCommentchar