J/A+A/310/715ivo://CDS.VizieR/J/A+A/310/715doi:10.26093/cds/vizier.33100715CDSCastellani M.Marconi G.Buonanno R.2000-11-07T14:32:14Z2000-11-07T15:32:07ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryccd-photometryWe present deep CCD photometry for the dwarf galaxy in Tucana (l=323, b=-47.4). The data indicate that the galaxy is dominated by an intermediate/old stellar population with metallicity similar to that of the galactic globular clusters NGC 6752 and NGC 7089 (M2) (we find [Fe/H]=~-1.56). The distance modulus we derived, (m-M)_V_=~24.72+/-0.2, makes clear that this galaxy belongs to the Local Gro up. Tucana is clearly different from other dwarf galaxies, such as Leo I (Lee et al., 1993AJ....106.1420L), or Phoenix (Ortolani and Gratton, 1988PASP..100.1405O), because there is no evidence of a young stellar population (t<=5Gyrs) We suggest that the Tucana Galaxy is a genuine dwarf spheroidal in which no recent burst of star formation occurred.1996A&A...310..715Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/310/715CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/330/453 : Sagittarius Dwarf Galaxy VI photometry (Marconi+, 1998)J/AJ/118/1671 : Fornax cluster 4 VI photometry (Buonanno+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/310/715https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/310/715http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/310/715https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/310/715https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/310/715http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/310/715GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/310/715/tucanaTucana VI photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/940] A progressive numbermeta.idintXposX coordinate in the frame (1)pixpos.cartesian.x;instr.detfloatYposY coordinate in the frame (1)pixpos.cartesian.y;instr.detfloatVmagmagnitude in the V bandmagphot.mag;em.opt.VfloatV-I(V-I) color indexmagphot.color;em.opt.V;em.opt.Ifloat