J/MNRAS/465/2748ivo://CDS.VizieR/J/MNRAS/465/2748doi:10.26093/cds/vizier.74652748CDSPiatti A.E.2024-08-16T20:19:59Z2019-02-01T13:57:40ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomybroad-band-photometryWe turn our attention to Haffner 9, a Milky Way open cluster whose previous fundamental parameter estimates are far from being in agreement. In order to provide with accurate estimates, we present high-quality Washington CT_1_ and Johnson BVI photometry of the cluster field. We put particular care in statistically cleaning the colour-magnitude diagrams (CMDs) from field star contamination, which was found a common source in previous works for the discordant fundamental parameter estimates. The resulting cluster CMD fiducial features were confirmed from a proper motion membership analysis. Haffner 9 is a moderately young object (age~350Myr), placed in the Perseus arm - at a heliocentric distance of ~3.2kpc - , with a lower limit for its present mass of ~160M_{sun}_ and of nearly metal solar content. The combination of the cluster structural and fundamental parameters suggest that it is in an advanced stage of internal dynamical evolution, possibly in the phase typical of those with mass segregation in their core regions. However, the cluster still keeps its mass function close to that of the Salpeter's law.2017MNRAS.465.2748Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/465/2748CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/MNRAS/382/1203 : CT1 photometry of 5 SMC star clusters (Piatti+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/465/2748https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/465/2748http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/465/2748https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/465/2748https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/465/2748http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/465/2748GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.9196443747461696e-19 3.2860540898823595e-19OpticaldefaultJ/MNRAS/465/2748/table2CT1 data of stars in the field of Haffner 9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar sequential numbermeta.recordintXposX positionpixpos.cartesian.x;instr.detdoubleYposY positionpixpos.cartesian.y;instr.detdoubleT1magWashington T1 magnitudemagphot.mag;em.opt.Rfloate_T1magrms uncertainty on T1magstat.error;phot.magfloato_T1mag? Number of observation for T1magmeta.numberintnullableC-T1Washington C-T1 colour indexmagphot.color;em.opt.U;em.opt.Rfloate_C-T1rms uncertainty on C-T1magstat.errorfloato_C-T1? Number of observation for C-T1meta.numberintnullableJ/MNRAS/465/2748/table3CT1 data of stars in the field of Lindsay 106recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar sequential numbermeta.recordintXposX positionpixpos.cartesian.x;instr.detdoubleYposY positionpixpos.cartesian.y;instr.detdoubleT1magWashington T1 magnitudemagphot.mag;em.opt.Rfloate_T1magrms uncertainty on T1magstat.error;phot.magfloato_T1mag? Number of observation for T1magmeta.numberintnullableC-T1Washington C-T1 colour indexmagphot.color;em.opt.U;em.opt.Rfloate_C-T1rms uncertainty on C-T1magstat.errorfloato_C-T1? Number of observation for C-T1meta.numberintnullable