J/MNRAS/381/1035ivo://CDS.VizieR/J/MNRAS/381/1035doi:10.26093/cds/vizier.73811035CDSSmith R.J.Lucey J.R.Hudson M.J.2024-07-05T20:15:31Z2009-03-04T15:10:51ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesspectroscopyWe present new optical spectroscopy for 342 R<18 galaxies in the Shapley supercluster (and 198 supplementary galaxies), obtained from 8-h integrations with the AAOmega facility at the Anglo-Australian Telescope. We describe the observations and measurements of central velocity dispersion {sigma}, emission-line equivalent widths and absorption-line indices. The distinguishing characteristic of the survey is its coverage of a very wide baseline in velocity dispersion (90 per cent range {sigma}=40-230km/s), while achieving high signal-to-noise ratio throughout (median 60{AA}^-1^ at 5000{AA}). The data quality will enable estimates of Balmer-line ages to better than 20 per cent precision even for the faintest galaxies in the sample. Significant emission at H{alpha} was detected in ~30 per cent of the supercluster galaxies, including ~20 per cent of red-sequence members. Using line-ratio diagnostics, we find that the emission is LINER (low ionization nuclear emission region) like at high luminosity, but driven by star formation in low-luminosity galaxies. To characterize the absorption lines, we use the classical Lick indices in the spectral range 4000-5200{AA}. We introduce a new method for applying resolution corrections to the line-strength indices. We define a subset of galaxies with very low emission contamination, based on the H{alpha} line, and fit the index relations for this subset. The final sample analysed in this paper comprises 232 NFPS-selected galaxies meeting both the emission and the redshift criteria, of which 198 have measured velocity dispersions (i.e. are not unresolved).2007MNRAS.381.1035Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/381/1035CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/110/463 : Kinematics of the Shapley supercluster (Quintana+ 1995)J/A+AS/119/329 : VR photometry in the Shapley Supercluster (Slezak+, 1996)J/A+AS/120/357 : R magnitudes in four ESO fields (Infante+, 1996)J/other/PASA/16.113 : New structure in Shapley supercluster (Drinkwater+, 1999)J/MNRAS/312/540 : Redshift survey of intercluster galaxies (Bardelli+, 2000)J/AJ/130/2541 : Core of the Shapley supercluster at 1.4GHz (Miller+, 2005)J/A+A/445/819 : Systems of galaxies in Shapley supercluster (Ragone+, 2006)J/AJ/128/1558 : NOAO Fundamental Plane Survey (Smith+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/381/1035https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/381/1035http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/381/1035https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/381/1035https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/381/1035http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/381/1035GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/381/1035/tables (Basic data, principal and supplementary line-strength indices for the sample galaxies (tables 2, 3 and 4 of the paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/381/1035/tables?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/381/1035/tables?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/381/1035/tables?GETtext/xml+votable180.050000true200.8704167-31.71166670.0055555555555555565/10959 6/43831 43835https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/381/1035?format=asciiOpticaldefaultJ/MNRAS/381/1035/tablesBasic data, principal and supplementary line-strength indices for the sample galaxies (tables 2, 3 and 4 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintn_NFPSimbad column added by the CDSmeta.ref.urlcharNFPNFP galaxy designation (JHHMMSS.s+DDMMSS)meta.id;meta.maincharS/NSignal-to-noise ratio measured over a rest-frame interval of 4500-5500{AA}stat.snr;time.intervalintczHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintRmagTotal (Harris) R magnitude from NFPS photometrymagphot.mag;em.opt.RfloatBmagTotal (Harris) B magnitude from NFPS photometrymagphot.mag;em.opt.BfloatlogSv? Velocity dispersion (2) (1)log(km.s**-1)phys.veloc.dispersionfloatnullablee_logSv? rms uncertainty on logsigmalog(km.s**-1)stat.errorfloatnullableMgb5177Non-degenerate absorption-line index Mgb5177 (3) (2)spect.indexfloate_Mgb5177rms uncertainty on Mgb5177stat.errorfloatFe5015? Non-degenerate absorption-line index Fe5015 (2) (3)spect.indexfloatnullablee_Fe5015? rms uncertainty on Fe5015stat.errorfloatnullableHgF? Non-degenerate absorption-line index HgF (2) (3)spect.indexfloatnullablee_HgF? rms uncertainty on HgFstat.errorfloatnullableHdAHdA line-strength indexspect.indexfloate_HdArms uncertainty on HdAstat.errorfloatHdFHdF line-strength indexspect.indexfloate_HdFrms uncertainty on HdFstat.errorfloatCN1CN1 line-strength indexspect.indexfloate_CN1rms uncertainty on CN1stat.errorfloatCN2CN2 line-strength indexspect.indexfloate_CN2rms uncertainty on CN2stat.errorfloatCa4227Ca4227 line-strength indexspect.indexfloate_Ca4227rms uncertainty on Ca4227stat.errorfloatG4300G4300 line-strength indexspect.indexfloate_G4300rms uncertainty on G4300stat.errorfloatHgA? HgA line-strength indexspect.indexfloatnullablee_HgA? rms uncertainty on HgAstat.errorfloatnullableFe4383? Fe4383 line-strength indexspect.indexfloatnullablee_Fe4383? rms uncertainty on Fe4383stat.errorfloatnullableCa4455? Ca4455 line-strength indexspect.indexfloatnullablee_Ca4455? rms uncertainty on Ca4455stat.errorfloatnullableFe4531? Fe4531 line-strength indexspect.indexfloatnullablee_Fe4531? rms uncertainty on Fe4531stat.errorfloatnullableFe4668? Fe4668 line-strength indexspect.indexfloatnullablee_Fe4668? rms uncertainty on Fe4668stat.errorfloatnullableHbetaH{beta} line-strength indexspect.indexfloate_Hbetarms uncertainty on Hbetastat.errorfloatFe5406Fe5406 line-strength indexspect.indexfloate_Fe5406rms uncertainty on Fe5406stat.errorfloat_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