J/MNRAS/430/221ivo://CDS.VizieR/J/MNRAS/430/221doi:10.26093/cds/vizier.74300221CDSAhumada A.V.Cignoni M.Bragaglia A.Donati P.Tosi M.Marconi G.2024-07-21T20:14:07Z2013-10-25T13:43:05ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryccd-photometryWe present CCD photometry of two southern open clusters. As part of the Bologna Open Cluster Chemical Evolution project we obtained BVI and UBVI imaging for NGC 2849 and NGC 6134, respectively. By means of the synthetic colour-magnitude diagram method and using various evolutionary sets of stellar evolution tracks with various metallicities, we determined at the same time age, distance and reddening. We also determined an approximate metallicity for NGC 2849, for which the information is not available from sounder methods like high-resolution spectroscopy. NGC 2849 turned to be 0.85-1.0Gyr old with a solar metallicity. The foreground reddening is E(B-V)=0.28-0.32, and the true distance modulus (m-M)_0_=13.8-13.9. For NGC 6134 we did not obtain fully consistent answers from the V, B-V and V, V-I photometry, an unexpected problem, since both the metallicity and the reddening are known (from high-resolution spectroscopy and the U-B, B-V two colours diagram, respectively). This may either indicate a difficulty of current models (evolutionary tracks and/or models of atmosphere) to accurately reproduce colours, or be related to differences in the metal mixture assumed by the models and those of the clusters. Assuming the spectroscopic abundance and the colour excess [E(B-V)=0.35] from the U-B, B-V plot, we derived a best age between 0.82 and 0.95Gyr and a distance modulus 10.5.2013MNRAS.430..221Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/430/221CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/140/135 : NGC 3680 & NGC 6134 Stromgren photometry (Bruntt+, 1999)J/A+A/385/867 : 5 open clusters CCD {Delta}a-photometry (Paunzen+, 2002)J/other/RMxAA/39.39 : CCD Photometry of NGC 2658, 2849, 3247 (Ahumada, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/430/221https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/430/221http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/430/221https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/430/221https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/430/221http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/430/221GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/430/221/ngc2849 (Optical BVI photometric catalogue for the open cluster NGC 2849)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/430/221/ngc2849?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/430/221/ngc2849?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/430/221/ngc2849?GETtext/xml+votable180.050000true139.86449167-40.550116670.005555555555555556Cone search capability for table J/MNRAS/430/221/ngc6134 (Optical UBVI photometric catalogue for the open cluster NGC 6134)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/430/221/ngc6134?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/430/221/ngc6134?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/430/221/ngc6134?GETtext/xml+votable180.050000true247.03115833-49.272205560.0055555555555555566/38578 42210 422162.367228618189496e-19 6.118840631666147e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/430/221?format=asciiOpticalInfrareddefaultJ/MNRAS/430/221/ngc2849Optical BVI photometric catalogue for the open cluster NGC 2849recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdStar identification number (1)meta.id;meta.mainintXposX pixel coordinatepixpos.cartesian.xfloatYposY pixel coordinatepixpos.cartesian.yfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainBmag? B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? B band magnitude errormagstat.error;phot.mag;em.opt.BfloatnullableVmagb? V band magnitude determined from (B-V)magphot.mag;em.opt.Vfloatnullablee_Vmagb? V band magnitude error from (B-V)magstat.error;phot.mag;em.opt.VfloatnullableVmagi? V band magnitude determined from (V-I)magphot.mag;em.opt.Vfloatnullablee_Vmagi? V band magnitude error from (V-I)magstat.error;phot.mag;em.opt.VfloatnullableImag? I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? I band magnitude errormagstat.error;phot.mag;em.opt.IfloatnullableJ/MNRAS/430/221/ngc6134Optical UBVI photometric catalogue for the open cluster NGC 6134recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdStar identification numbermeta.id;meta.mainintXposX pixel coordinatepixpos.cartesian.xfloatYposY pixel coordinatepixpos.cartesian.yfloatRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainUmag? U band magnitudemagphot.mag;em.opt.Ufloatnullablee_Umag? U band magnitude errormagstat.error;phot.mag;em.opt.UfloatnullableBmag? B band magnitudemagphot.mag;em.opt.Bfloatnullablee_Bmag? B band magnitude errormagstat.error;phot.mag;em.opt.BfloatnullableVmagb? V band magnitude determined from (B-V)magphot.mag;em.opt.Vfloatnullablee_Vmagb? V band magnitude error from (B-V)magstat.error;phot.mag;em.opt.VfloatnullableVmagi? V band magnitude determined from (V-I)magphot.mag;em.opt.Vfloatnullablee_Vmagi? V band magnitude error from (V-I)magstat.error;phot.mag;em.opt.VfloatnullableImag? I band magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag? I band magnitude errormagstat.error;phot.mag;em.opt.Ifloatnullable