J/A+A/442/165ivo://CDS.VizieR/J/A+A/442/165doi:10.26093/cds/vizier.34420165CDSCioni M.-R.L.Habing H.J.2005-11-06T18:47:26Z2005-11-06T19:47:10ZCDS support team

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

cds-question@unistra.frgalaxiesphotometryinfrared-photometrylate-type-starsWith the William Herschel Telescope in La Palma we made IJKs observations of an area of about 40'x30' of the Local Group galaxy Draco. This allows us to describe Draco's late-type stellar population across the whole galaxy at a photometric level 2mag deeper than the 2MASS survey. We detected the red giant branch (RGB) and measured the magnitude of the tip of the RGB in the three bands. From that in the I band we obtain a distance modulus of (m-M)_0=19.49+/-0.06(stat)+/-0.15(sys), in excellent agreement with a measurement from RR Lyrae stars. The peak of the (J-Ks)_0_ histogram at different M_Ks_ suggests that Draco has a mean [Fe/H]=-1.95+/-1.26 while fiducial RGB tracks of Galactic globular clusters indicate a mean [Fe/H]=-1.33+/-0.72 where the error corresponds to the spread around the mean value. There are significant differences between the colour-magnitude diagrams of stars in the inner, medium and outer areas of the galaxy. A metal poor (Z=0.0004) intermediate-age population (about 1.6Gyr old) is clearly present and emerges in particular between 6' and 12' from the centre of the galaxy. A few additional carbon star candidates have been identified from both their location in the colour-magnitude diagram and from an indication of variability. The large scale distribution of late-type stars is smooth but irregular in shape; this points at a variation of inclination with radius.2005A&A...442..165Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/442/165CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/429/837 : IJKs photometry of late-type stars in NGC 6822 (Cioni+, 2005)J/AJ/121/841 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+, 2001)J/AJ/123/2511 : RV photometry of Draco dwarf spheroidal galaxy (Piatek+, 2002)J/ApJS/145/245 : SDSS stars in Draco dwarf spheroidal galaxy (Rave+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/442/165https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/442/165http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/442/165https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/442/165https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/442/165http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/442/165GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/442/165/table1 (IJKs photometry of 2570 stars in Draco)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/442/165/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/442/165/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/442/165/table1?GETtext/xml+votable180.050000true260.0890811157.691798890.0055555555555555566/10181-10183 10188https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/442/165?format=asciiOpticalInfrareddefaultJ/A+A/442/165/table1IJKs photometry of 2570 stars in DracorecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension J2000 (degrees)degpos.eq.ra;meta.mainDEJ2000Declination J2000 (degrees)degpos.eq.dec;meta.mainImagI magnitudemagfloate_ImagError in I magnitudemagfloatf_Imag[0/2] SExtractor flag in I magnitude (1)intJmagJ magnitudemagfloate_JmagError in J magnitudemagfloatf_Jmag[0/2] SExtractor flag in J magnitude (1)intKsmagKs magnitudemagfloate_KsmagError in Ks magnitudemagfloatf_Ksmag[0/2] SExtractor flag in Ks magnitude (1)int