J/MNRAS/509/1536ivo://CDS.VizieR/J/MNRAS/509/1536doi:10.26093/cds/vizier.75091536CDSMaitra S.Srianand R.Gaikwad P.2025-02-12T20:11:56Z2024-10-23T09:52:19ZCDS support team

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

cds-question@unistra.frquasarsredshiftedh-i-line-emissionWe present redshift-space two-point ({xi}), three-point ({dzeta}), and reduced three- point (Q) correlation of Ly{alpha} absorbers (Voigt profile components having HI column density, N_HI_>10^13.5^cm^-2^) over three redshift bins spanning 1.7<z<3.5 using high-resolution spectra of 292 quasars. We detect positive {xi} up to 8h^-1^cMpc in all three redshift bins. The strongest detection of {dzeta}=1.81+/-0.59 (with Q=0.68+/-0.23) is in z=1.7-2.3 bin at 1-2h^-1^cMpc. The measured {xi} and {dzeta} values show an increasing trend with N_HI_, while Q remains relatively independent of N_HI_. We find {xi} and {dzeta} to evolve strongly with redshift. Using simulations, we find that {xi} and {dzeta} seen in real space may be strongly amplified by peculiar velocities in redshift space. Simulations suggest that while feedback, thermal and pressure smoothing effects influence the clustering of Ly{alpha} absorbers at small scales, i.e. <0.5h^-1^cMpc, the HI photoionization rate ({GAMMA}_HI_) has a strong influence at all scales. The strong redshift evolution of {xi} and {dzeta} (for a fixed N_HI_ cut-off) is driven by the redshift evolution of the relationship between _HI_ and baryon overdensity. Our simulation using best- fitting {GAMMA}_HI_(z) measurements produces consistent clustering signals with observations at z~2 but underpredicts the clustering at higher redshifts. One possible remedy is to have higher values of {GAMMA}_HI_ at higher redshifts. Alternatively the discrepancy could be related to non-equilibrium and inhomogeneous conditions prevailing during He ii reionization not captured by our simulations.2022MNRAS.509.1536Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/509/1536CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/509/1536https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/509/1536http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/509/1536https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/509/1536https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/509/1536http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/509/1536GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/509/1536/table3 (SQUAD sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/509/1536/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/509/1536/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/509/1536/table3?GETtext/xml+votable180.050000true3.0454175-1.36877470.005555555555555556Cone search capability for table J/MNRAS/509/1536/table4 (KODIAQ sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/509/1536/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/509/1536/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/509/1536/table4?GETtext/xml+votable180.050000true1.33423175.40300080.0055555555555555566/6 8 523 532 993 2172 2348 2611 4027 4124 4259 4273 4672 4946-4947 4950 5035 5039 5051 5270 5272 5563 5696 5723 5780 5886 5952 6010 6030 6042 6062 6070 6106 6205 6403 6425 6565 6576 6591 6644 6652 6853 7168 7253 7291 7309 7500 7709 7857 7964 8343 8345 8552 8912 9112 9114 9138 9272 9412 9464 9759 9801 9806 9827 9940 9946 9973 10074 10140 10188 10312 10336 10405 10602 10698 10752 10843 10992 10994 11040 11092 11107 11113 11283 11321 11339 11418 11529 11581 11596 11765 11786 11796 12563 16269 16500 16553 16555 16597 16652 16654 16656 16658 16664 16717 17190 17244 17299 17317 17404 17510 17693 17735 17749 17772 17778 17805 17813 17895 18029-18030 18042 18060 18081 18092 18101 18200 18271 18366 18389 18406 18408 18466 18504 18521 18582 18765 18769 18780 18858 18880 19087 19408 19416 19461 19483 19494 19609 19680 19682 19688 19734 19779 20016 20032 20202 20450 20731 21012 21180 22576 22578 22594 22715 23099 23203 23210 23284 23304 24809 25120 25285 25344 25599 25697 25827 25934 25972 25976 26000 26125 26166-26167 26170 26269 26429 26479 26553 26603 26882 27247 27365 27416 27423 27437 27485 27510 27549 27578 27654 27667 27687 27747 27756 27773 27841 27845-27846 28042 28281 28532 28548 28611 28648 29795 30029 31331 31551 31622 34019 34485 34503 35213 35281 35496 35522 35585 35595 35627 35772 35774 35916 36012 36090 36101 36130 36217 36241 36265 36346 36417 36495 36771 36784 36803 40060 40274 40446 43903 44269 45393 45621 46418 46638 46651 46731 46924 46953 47001 47007 47016 47091 47941 48474 48498 48567 48610 49086 49100https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/509/1536?format=asciiRadiodefaultJ/MNRAS/509/1536/table3SQUAD samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintQSOQSO name (JHHMMSS+DDMMSS) (1)meta.id;meta.maincharzemEmission redshiftsrc.redshiftfloatMedianSNRMedian signal-to-noise ratioem.wl.central;stat.medianfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainzminMinimum value of redshiftsrc.redshiftdoublezmaxMaximum value of redshiftsrc.redshiftdoubleJ/MNRAS/509/1536/table4KODIAQ sampleSimbadSimbad column added by the CDSmeta.ref.urlcharQSOQSO name (JHHMMSS+DDMMSS) (1)meta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzemEmission redshiftsrc.redshiftfloatzminMinimum value of redshiftsrc.redshiftdoublezmaxMaximum value of redshiftsrc.redshiftdoubleMedianSNRMedian signal-to-noise ratioem.wl.central;stat.medianfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main