J/A+A/468/807ivo://CDS.VizieR/J/A+A/468/807doi:10.26093/cds/vizier.34680807CDSMannucci F.Bonnoli G.Maiolino R.Zappacosta L.Pedani M.2007-08-18T10:06:44Z2007-08-18T10:02:45ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryx-ray-sourcesredshiftedWe present the results of spectroscopic observations of galaxies associated with the diffuse X-ray emitting structure discovered by Zappacosta et al. (2002A&A...394....7Z). After measuring the redshifts of 161 galaxies, we confirm an overdensity of galaxies with projected dimensions of at least 2Mpc, determine its spectroscopic redshift in z=0.401+/-0.002, and show that it is spatially coincident with the diffuse X-ray emission. This confirms the original claim that this X-ray emission has an extragalactic nature and is due to the warm-hot intergalactic medium (WHIM). We used this value of the redshift to compute the temperature of the emitting gas. The resulting value depends on the metallicity that is assumed for the IGM, and is constrained to be between 0.3 and 0.6keV for metallicities between 0.05 and 0.3solar, in good agreement with the expectations from the WHIM.2007A&A...468..807Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/468/807CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/468/807https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/468/807http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/468/807https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/468/807https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/468/807http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/468/807GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/468/807/table2 (Target list and spectroscopic redshift)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/468/807/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/468/807/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/468/807/table2?GETtext/xml+votable180.050000true152.485916752.46868610.0055555555555555566/6026 6048 6050https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/468/807?format=asciiX-rayOpticaldefaultJ/A+A/468/807/table2Target list and spectroscopic redshiftrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numberdmeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainRmagR-band magnitude (Vega system)magphot.mag;em.opt.RfloatTel[WHT TNG] Telescope (1)meta.id;instr.telcharz? Spectroscopic redshiftsrc.redshiftfloatnullableq_z[1/4]? Redshift quality flag (2)meta.code.qual;src.redshiftintnullableClass[EMLUQS] Spectral classification (3)src.classchar