J/AJ/117/2244ivo://CDS.VizieR/J/AJ/117/2244doi:10.26093/cds/vizier.51172244CDSOlsen K.A.G.2023-04-06T16:50:32Z2001-03-21T20:46:49ZCDS support team

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

cds-question@unistra.frglobular-star-clustershertzsprung-russell-diagrammagellanic-cloudsphotometryWe present results on the analysis of background field stars found in Hubble Space Telescope Wide Field Planetary Camera 2 observations of six of the old globular clusters of the Large Magellanic Cloud. Treated as contaminants by the globular cluster analysts, we produce (V-I, V) color-magnitude diagrams (CMDs) of the field stars and use them to explore the LMC's star formation history. The photometry approaches V {~} 26, well below the turnoff of an ancient ({~} 14 Gyr) LMC population of stars. The field star CMDs are generally characterized by an upper main sequence broadened by stellar evolution, an old red giant branch, a prominent red clump, and an unevolved lower main sequence. The CMDs also contain a few visual differences, the most obvious of which is the smeared appearance of the NGC 1916 field caused by heavy differential reddening. More subtly, the base of the subgiant branch near the old turnoff appears extended in V, and the red giant branch appears broad in V-I in four of the fields but not in the NGC 1754 field.1999AJ....117.2244Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/117/2244CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/300/665 : HST VI Photometry of Six LMC Old Globular Clustershttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/117/2244https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/117/2244http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/117/2244https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/117/2244https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/117/2244http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/117/2244GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapHSTOpticaldefaultJ/AJ/117/2244/table1aNGC 1754 Wide Field Camera photometryVTypeDaoPHOT object type (1)src.classintITypeDaoPHOT object type (1)src.classintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar numbermeta.idintXpixX pixel value in the V band imagepixpos.cartesian.x;instr.detfloatYpixY pixel value in the V band imagepixpos.cartesian.y;instr.detfloatVmagJohnson V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag from DaoPHOTmagstat.errorfloatImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imag from DaoPHOTmagstat.errorfloatf_Star[y] Stars removed by cluster-star cleaning proceduremeta.code.errorcharJ/AJ/117/2244/table1bNGC 1835 Wide Field Camera photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar numbermeta.idintXpixX pixel value in the V band imagepixpos.cartesian.x;instr.detfloatYpixY pixel value in the V band imagepixpos.cartesian.y;instr.detfloatVmagJohnson V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag from DaoPHOTmagstat.errorfloatImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imag from DaoPHOTmagstat.errorfloatVTypeDaoPHOT object type (1)src.classintITypeDaoPHOT object type (1)src.classintf_Star[y] Stars removed by cluster-star cleaning proceduremeta.code.errorcharJ/AJ/117/2244/table1cNGC 1898 Wide Field Camera photometryVTypeDaoPHOT object type (1)src.classintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar numbermeta.idintXpixX pixel value in the V band imagepixpos.cartesian.x;instr.detfloatYpixY pixel value in the V band imagepixpos.cartesian.y;instr.detfloatVmagJohnson V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag from DaoPHOTmagstat.errorfloatImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imag from DaoPHOTmagstat.errorfloatITypeDaoPHOT object type (1)src.classintf_Star[y] Stars removed by cluster-star cleaning proceduremeta.code.errorcharJ/AJ/117/2244/table1dNGC 1916 Wide Field Camera photometryVTypeDaoPHOT object type (1)src.classintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar numbermeta.idintXpixX pixel value in the V band imagepixpos.cartesian.x;instr.detfloatYpixY pixel value in the V band imagepixpos.cartesian.y;instr.detfloatVmagJohnson V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag from DaoPHOTmagstat.errorfloatImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imag from DaoPHOTmagstat.errorfloatITypeDaoPHOT object type (1)src.classintf_Star[y] Stars removed by cluster-star cleaning proceduremeta.code.errorcharJ/AJ/117/2244/table1eNGC 2005 Wide Field Camera photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar numbermeta.idintXpixX pixel value in the V band imagepixpos.cartesian.x;instr.detfloatYpixY pixel value in the V band imagepixpos.cartesian.y;instr.detfloatVmagJohnson V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag from DaoPHOTmagstat.errorfloatImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imag from DaoPHOTmagstat.errorfloatVTypeDaoPHOT object type (1)src.classintITypeDaoPHOT object type (1)src.classintf_Star[y] Stars removed by cluster-star cleaning proceduremeta.code.errorcharJ/AJ/117/2244/table1fNGC 2019 Wide Field Camera photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar numbermeta.idintXpixX pixel value in the V band imagepixpos.cartesian.x;instr.detfloatYpixY pixel value in the V band imagepixpos.cartesian.y;instr.detfloatVmagJohnson V band magnitudemagphot.mag;em.opt.Vfloate_VmagUncertainty in Vmag from DaoPHOTmagstat.errorfloatImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_ImagUncertainty in Imag from DaoPHOTmagstat.errorfloatVTypeDaoPHOT object type (1)src.classintITypeDaoPHOT object type (1)src.classintf_Star[y] Stars removed by cluster-star cleaning proceduremeta.code.errorchar