J/A+A/663/A131ivo://CDS.VizieR/J/A+A/663/A131doi:10.26093/cds/vizier.36630131CDSPerren G.I.Pera M.S.Navone H.D.Vazquez R.A.2022-11-13T17:16:45Z2022-07-21T08:10:03ZCDS support team

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

cds-question@unistra.fropen-star-clustersmetallicitystellar-agesstellar-distancevisible-astronomySeveral studies have been presented in the last few years applying some kind of automatic processing of data to estimate the fundamental parameters of open clusters. These parameters are later on employed in larger scale analyses, for example the structure of the Galaxy's spiral arms. The distance is one of the more straightforward parameters to estimate, yet enormous differences can still be found among published data. This is particularly true for open clusters located more than a few kpc away. We cross-matched several published catalogues and selected the twenty-five most distant open clusters (>9000pc). We then performed a detailed analysis of their fundamental parameters, with emphasis on their distances, to determine the agreement between catalogues and our estimates. Photometric and astrometric data from the Gaia EDR3 survey was employed. The data was processed with our own membership analysis code (pyUPMASK), and our package for automatic fundamental cluster's parameters estimation ASteCA. We find differences in the estimated distances of up to several kpc between our results and those catalogued, even for the catalogues that show the best matches with ASteCA values. Large differences are also found for the age estimates. As a by-product of the analysis we find that vd Bergh-Hagen 176 could be the open cluster with the largest heliocentric distance catalogued to date. Caution is thus strongly recommended when using catalogued parameters of open clusters to infer large-scale properties of the Galaxy, particularly for those located more than a few kpc away.2022A&A...663A.131Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/663/A131CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/663/A131https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/663/A131http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/663/A131https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/663/A131https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/663/A131http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/663/A131GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/663/A131/table2 (Fundamental parameters estimated with ASteCA)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/663/A131/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/663/A131/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/663/A131/table2?GETtext/xml+votable180.050000true95.52-6.3210.0055555555555555566/13989 14195 14367 14451 20763 20814 20939 21372 21567 21632 21644 22111 22235 23861 37211 37245 37279 37320 38040 39193 39246 39350 39705 39710 39763https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/663/A131?format=asciiOpticaldefaultJ/A+A/663/A131/table2Fundamental parameters estimated with ASteCA_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintb_E(B-V)Extinction E(B-V) 16th percentilemagphys.absorptionfloatB_E(B-V)Extinction E(B-V) 84th percentilemagphys.absorptionfloatMODDistance modulusmagphot.mag.distModfloatb_MODDistance modulus 16th percentilemagphot.magfloatB_MODDistance modulus 85th percentilemagphot.magfloatDistDistancekpcpos.distancefloatb_DistDistance 16th percentilekpcpos.distancefloatB_DistDistance 84th percentilekpcpos.distancefloatMassTotal masssolMassphys.massdoubleb_MassTotal mass 16th percentilesolMassphys.massdoubleB_MassTotal mass 84th percentilesolMassphys.massdoublebfrBinary fractionstat.fit.paramfloatb_bfrBinary fraction 16th percentilemeta.notefloatSimbadNameSimbad column added by the CDSmeta.idcharnullable[Fe/H]Metallicityphys.abund.Zfloatb_[Fe/H]Metallicity 16th percentilephys.abund.ZfloatB_[Fe/H]Metallicity 84th percentilephys.abund.Zfloatlog(Age)Logarithm of agelog(yr)time.agefloatb_log(Age)Logarithm of age 16th percentilelog(yr)time.agefloatB_log(Age)Logarithm of age 84th percentilelog(yr)time.agefloatE(B-V)Extinction E(B-V)magphot.color.excessfloatClusterCluster namemeta.id;meta.maincharB_bfrBinary fraction 84th percentilemeta.notefloatNNumber of true members used to estimate the parameters valuesmeta.numberint_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main