J/ApJ/659/1198ivo://CDS.VizieR/J/ApJ/659/1198doi:10.26093/cds/vizier.16591198CDSEvans C.J.Bresolin F.Urbaneja M.A.Pietrzynski G.Gieren W.,Kudritzki R.-P.2017-12-22T05:33:24Z2010-07-17T14:56:01ZCDS support team

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

cds-question@unistra.frgalaxiessupergiant-starsradial-velocityWe have obtained multiobject spectroscopy of luminous blue supergiants in NGC 3109, a galaxy at the periphery of the Local Group at ~1.3Mpc. We present a detailed catalog including finding charts, V and I magnitudes, spectral classifications, and stellar radial velocities. The radial velocities are seen to trace the rotation curves obtained from studies of the H I gas. From quantitative analysis of eight B-type supergiants we find a mean oxygen abundance of 12+log(O/H)=7.76+/-0.07 (1{sigma} systematic uncertainty), with a median result of 7.8. Given its distance, we highlight NGC 3109 as the ideal example of a low-metallicity, dark-matter-dominated dwarf galaxy for observations with the next generation of ground-based extremely large telescopes.2007ApJ...659.1198Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/659/1198CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/648/366 : Araucaria: NGC 3109 Cepheids VI phot. (Pietrzynski+, 2006)J/ApJ/648/375 : Araucaria: NGC 3109 Cepheids JK phot. (Soszynski+, 2006)J/A+A/466/75 : PN and HII regions of West and East of NGC 3109 (Pena+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/659/1198https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/659/1198http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/659/1198https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/659/1198https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/659/1198http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/659/1198GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/659/1198/table2 (Observational parameters of target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/659/1198/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/659/1198/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/659/1198/table2?GETtext/xml+votable180.050000true150.7997083-26.15805830.0055555555555555566/38843 388463.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/659/1198?format=asciiOpticaldefaultJ/ApJ/659/1198/table2Observational parameters of target starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqStar sequential numbermeta.recordintField[1/4] Field numbermeta.id;obs.fieldintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainVmagJohnson V magnitudemagphot.mag;em.opt.VfloatV-Ic? Johnson-Cousins V-I colour indexmagphot.color;em.opt.V;em.opt.IfloatnullableSpTypeMK spectral typesrc.spTypecharRV? Radial velocitykm/sspect.dopplerVeloc;pos.heliocentricintnullablee_RV? 1-{sigma} uncertainty of RVkm/sstat.errorintnullableNl? Number of lines used for RVmeta.numberintnullableS/N? Signal-to-noise ratiostat.snrintnullableComComments (1)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar