J/MNRAS/484/5868ivo://CDS.VizieR/J/MNRAS/484/5868doi:10.26093/cds/vizier.74845868CDSHayashino T.Inoue A.K.Kousai K.Kashikawa N.Mawatari K.Matsuda Y.,Tejos N.Prochaska J.X.Iwata I.Noll S.Burgarella D.Yamada T.,Akiyama M.2024-08-19T20:16:59Z2022-10-10T14:32:33ZCDS support team

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

cds-question@unistra.frintergalactic-mediumactive-galactic-nucleiredshiftedinfrared-photometryvisible-astronomybroad-band-photometrysloan-photometryIn the SSA22 field which exhibits a large-scale proto-cluster at z=3.1, we carried out a spectroscopic survey for Lyman Break Galaxies (LBGs) with the VLT/VIMOS and identified 78 confident LBGs at z=2.5-4. We stacked their spectra in the observer's frame by using a sophisticated method. Analysing the composite spectrum, we have revealed that the large-scale proto-cluster at z=3.1 has a strong HI absorption dip of rest-frame equivalent width of -1.7{AA}. Another strong absorption dip found at z=3.28 is associated with a modestly high-density LBG peak, similar to that at z=3.1. We have also detected an HI transparency peak at z=2.98 in the composite spectrum, coincident with a void in the LBG distribution. In this paper, we also investigated the relation between LBGs, HI gas, and active galactic nuclei (AGNs) at z=3-4 in the SSA22 field. Two AGNs at z=3.353 and 3.801 are, respectively, associated with the LBG concentration of an overdensity factor {delta}_LBG_~2 in the present statistics. Another structure at z=3.453 is remarkable: 20 comoving Mpc-scale dense HI gas which is not associated with any apparent LBG overdensity but involving a pair of AGNs. Such structure may be a new type of the AGN-matter correlation. If the inhomogeneous structures over a comoving Gpc scale found in this paper are confirmed with sufficient statistics in the future, the SSA22 field will become a key region to test the standard cold dark matter structure formation scenario.2019MNRAS.484.5868Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/484/5868CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/484/5868https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/484/5868http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/484/5868https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/484/5868https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/484/5868http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/484/5868GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/484/5868/tablea1 (Redshift catalogue of LBGs in the SSA22 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/484/5868/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/484/5868/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/484/5868/tablea1?GETtext/xml+votable180.050000true334.5248750.38740830.0055555555555555566/19033 190362.762881831355591e-19 4.920466254354166e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/484/5868?format=asciiOpticalInfrareddefaultJ/MNRAS/484/5868/tablea1Redshift catalogue of LBGs in the SSA22 fieldimagi' band AB-magnitudemagphot.mag;em.opt.Ifloatzmagz' band AB-magnitudemagphot.mag;em.opt.IfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFoV[1/2] FoV number (1 or 2) in the VIMOS observationsobs.fieldintQuadrant[1/4] Quadrant number (1 to 4) in the VIMOS FoVmeta.codeintSlitNumber of the slit in the quadrantmeta.noteintIDLBG identification numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRedshiftSystemic redshiftsrc.redshiftfloatCategoryRedshift category (1)meta.code.qualcharumagu* band AB-magnitude (2)magphot.mag;em.opt.UfloatBmagB band AB-magnitudemagphot.mag;em.opt.BfloatVmagV band AB-magnitudemagphot.mag;em.opt.VfloatRcmagRc band AB-magnitudemagphot.mag;em.opt.Rfloat