J/MNRAS/337/641ivo://CDS.VizieR/J/MNRAS/337/641doi:10.26093/cds/vizier.73370641CDSWaugh M.Drinkwater M.J.Webster R.L.Staveley-Smith L.Kilborn V.A.,Barnes D.G.Bhathal R.de Blok W.J.G.Boyce P.J.Disney M.J.,Ekers R.D.Freeman K.C.Gibson B.K.Henning P.A.Jerjen H.Knezek P.M.,Koribalski B.Marquarding M.Minchin R.F.Price R.M.Putman M.E.,Ryder S.D.Sadler E.M.Stootman F.Zwaan M.A.2024-06-28T20:16:58Z2009-04-22T17:45:01ZCDS support team

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

cds-question@unistra.frgalaxy-clustersh-i-line-emissionradio-astronomyradial-velocityUsing data from the HI Parkes All Sky Survey (HIPASS), we have searched for neutral hydrogen in galaxies in a region <25x25{deg}^2^ centred on NGC 1399, the nominal centre of the Fornax cluster. Within a velocity search range of 300-3700km/s and to a 3 lower flux limit of ~40mJy, 110 galaxies with HI emission were detected, one of which is previously uncatalogued. None of the detections has early-type morphology. Previously unknown velocities for 14 galaxies have been determined, with a further four velocity measurements being significantly dissimilar to published values. Identification of an optical counterpart is relatively unambiguous for more than ~90 per cent of our HI galaxies. The galaxies appear to be embedded in a sheet at the cluster velocity which extends for more than 30across the search area. At the nominal cluster distance of ~20Mpc, this corresponds to an elongated structure more than 10Mpc in extent. A velocity gradient across the structure is detected, with radial velocities increasing by ~500km/s from south-east to north-west. The clustering of galaxies evident in optical surveys is only weakly suggested in the spatial distribution of our HI detections. Of 62 HI detections within a 10{deg} projected radius of the cluster centre, only two are within the core region (projected radius <1{deg}) and less than 30 per cent are within 3.5{deg}, suggesting a considerable deficit of HI-rich galaxies in the centre of the cluster. However, relative to the field, there is a 3(+/-1)-fold excess of HI-rich galaxies in the outer parts of the cluster where galaxies may be infalling towards the cluster for the first time.2002MNRAS.337..641Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/337/641CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/73 : The HI Parkes All Sky Survey Catalogue (Meyer+, 2004)J/AJ/123/873 : HIPASS high-velocity clouds (Putman+, 2002)J/AJ/124/690 : H I-selected galaxies in South Celestial Cap (Kilborn+, 2002)J/AJ/124/1954 : 1000 brightest HIPASS galaxies catalog (Ryan-Weber+, 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/337/641https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/337/641http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/337/641https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/337/641https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/337/641http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/337/641GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/337/641/table1 (Properties of Fornax region detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/337/641/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/337/641/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/337/641/table1?GETtext/xml+votable180.050000true32.673333-40.9066670.0055555555555555566/33780 34029 34334-34335 34359 34361-34362 34364 34400 34402-34404 34412 34448-34449 34471 34476 34478 34491-34492 34495 34500-34502 34505 34511 34514 34517 34521 34531 34533 34535-34536 34538-34540 34542 34544 34548 34554 34602 34693-34694 34701 34724 34735 34755 34809-34810 35192-35193 35223 35267 35269 35287-35288 35863 35871 35876 35908 35913 35922 35924-35925 35929 35939 35960 35966-35967 35993 35995 36014 36022 36043 36049 36052 36054-36056 36062-36063 36075 36081 36103 36107 36131 36134-36135 36140 36152 36164 36234 36236 36240 36377 36380 36419https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/337/641?format=asciiOpticalRadiodefaultJ/MNRAS/337/641/table1Properties of Fornax region detectionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHIPASSHIPASS name, [WDW2002] HIPASS JHHMM+DDa in Simbadmeta.id;meta.maincharm_HIPASS[ab] Multiplicity index on HIPASSmeta.code.multipcharRAJ2000HI detection centre Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000HI detection centre Declination (J2000)pos.eq.dec;meta.mainV50HI heliocentric systemic radial velocity (optical convention) at the mid-point of the 50% widths from unsmoothed spectrakm/sspect.dopplerVelocintV20HI heliocentric systemic radial velocity (optical convention) at the mid-point of the 20% widths from unsmoothed spectrakm/sspect.dopplerVelocintW5050% HI velocity widthkm/sspect.line.width;em.line.HIintW2020% HI velocity widthkm/sspect.line.width;em.line.HIintSpeakHI peak fluxJyphot.flux.density;em.radio.750-1500MHzfloatSintTotal integrated HI fluxJy.km/sphot.flux.density;em.radio.750-1500MHzfloatbmag? Apparent blue magnitude (from NED, measurement type in n_bmag)magphot.mag;em.opt.Bfloatnullablen_bmagType of blue magnitude measurementmeta.noteM/LB? Mass-to-blue-light ratiophys.composition.massLightRatiofloatnullableVel? Optical galaxy velocity recorded in NEDkm/sspect.dopplerVeloc.opt;pos.heliocentricintnullableDist? Projected separation of the positions of the HI detection and the likely corresponding optical galaxyarcminpos.angDistancefloatnullableONameName(s) of the likely matching optical galaxymeta.id.crosscharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDScharRemRemarks (1)meta.notechar