J/ApJS/265/20ivo://CDS.VizieR/J/ApJS/265/20doi:10.26093/cds/vizier.22650020CDSChi H.Wei S.Wang F.Li Z.2024-01-09T12:20:11Z2023-06-16T07:57:44ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomytrigonometric-parallaxproper-motionsastronomical-modelsOpen clusters (OCs) are regarded as tracers to understand stellar evolution theory and validate stellar models. In this study, we presented a robust approach to identifying OCs. A hybrid method consisting of pyUPMASK (Pera+ 2021A&A...650A.109P) and the random forest (RF) algorithm is first used to remove field stars and determine more reliable members. An identification model based on the RF algorithm built based on 3714 OC samples from Gaia DR2 and EDR3 is then applied to identify OC candidates. The OC candidates are obtained after isochrone fitting, advanced stellar population synthesis model fitting, and visual inspection. Using the proposed approach, we revisited 868 candidates and preliminarily clustered them by the friends-of-friends algorithm in Gaia EDR3. Excluding OCs that have already been reported, we focused on the remaining 300 unknown candidates. From high to low fitting quality, these unrevealed candidates were further classified into Class A (59), Class B (21), and Class C (220). As a result, 46 new reliable OC candidates among Classes A and B are identified after visual inspection.2023ApJS..265...20Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/265/20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/A+A/558/A53 : MW global survey of star clusters. II. (Kharchenko+, 2013)J/A+A/618/A59 : Gaia confirmed nearby open clusters (Castro-Ginard+, 2018)J/A+A/618/A93 : Gaia DR2 open clusters in the MW (Cantat-Gaudin+, 2018)J/AJ/156/121 : Likely open cluster NGC 6405 members (Gao, 2018)J/A+A/623/A108 : Age of 269 GDR2 open clusters (Bossini+, 2019)J/A+A/624/A126 : Open clusters in Perseus direction (Cantat-Gaudin+, 2019)J/A+A/627/A35 : Open clusters in Gal. anti-centre (Castro-Ginard+, 2019)J/AJ/158/122 : Local structure & SFH of the MW (Kounkel+, 2019)J/ApJS/245/32 : Newly identified star clusters in Gaia DR2 (Liu+, 2019)J/ApJ/885/131 : High-mass SFR plx & proper motion with VLBI (Reid+, 2019)J/A+A/633/A99 : Gaia DR2 open clusters in the MW. II (Cantat-Gaudin+, 2020)J/A+A/635/A45 : Open clusters in the Galactic disc (Castro-Ginard+, 2020)J/MNRAS/496/2021 : New Galactic open clusters (Ferreira+, 2020)J/AJ/160/279 : Untangling the Galaxy. II. Within 3kpc (Kounkel+, 2020)J/MNRAS/504/356 : Updated parameters of 1743 open clusters (Dias+, 2021)J/A+A/646/A104 : Improving the open cluster census. I. (Hunt+, 2021)J/A+A/649/A7 : MC structure and properties (Gaia Collaboration+, 2021)J/A+A/652/A102 : 3794 open clusters parameters (Hao+, 2021)J/other/RAA/21.93 : 74 new open clusters found in Gaia DR2 (He+, 2021)J/MNRAS/503/236 : UVIT cat. and membership of 6 open clusters (Jadhav+, 2021)J/A+A/649/A3 : Gaia EDR3 photometric passbands (Riello+, 2021)J/A+A/660/A4 : Gaia EDR3 new Galactic open clusters (Hao+, 2022)J/A+A/661/A118 : Open clusters found with OCfinder (Castro-Ginard+, 2022)J/ApJS/259/19 : LISC cat. of star clusters. I. Gal. disk (Li+, 2022)J/ApJS/260/8 : 541 new open cluster candidates (He+, 2022)J/ApJS/262/7 : 886 nearby star clusters (He+, 2022)J/A+A/659/A59 : Structural param. of local open clusters (Tarricq+, 2022)J/A+A/663/A131 : Parameters for 25 distant open clusters (Perren+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/265/20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/265/20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/265/20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/265/20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/265/20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/265/20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/265/20/table2 (Parameters of the final 46 new open clusters (OCs) in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/265/20/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/265/20/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/265/20/table2?GETtext/xml+votable180.050000true102.65129.270.0055555555555555566/1341-1342 1904 3036 3349 6312 6314 6692 6821 6836 14315 14441 14635 14855 21542 22081 22882 23840 23844 24374 28919 30254 37892 37914 38408 39211 39372 39397 39416 39793 39798 39807 39889 39892-39893 39895 40098 40481 40483 40489 40589 40608-40609 41776https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/265/20?format=asciiOpticaldefaultJ/ApJS/265/20/table2Parameters of the final 46 new open clusters (OCs) in this workrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedSeq[0/45] Internal index numbermeta.idintID[976/3595] Identifier from Li+ 2022, J/ApJS/259/19meta.id;meta.mainintRA_ICRS[11.8/345] Right Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.maine_RA_ICRS[0.02/1.4] Uncertainty in RAdegdegstat.error;pos.eq.rafloatDE_ICRS[-64/61.2] Declination (ICRS) at Ep=2016.0degpos.eq.dec;meta.maine_DE_ICRS[0.01/1.4] Uncertainty in DEdegdegstat.error;pos.eq.decfloatplx[0.2/3.5] Gaia EDR3 parallaxmaspos.parallax.trigfloate_plx[0.008/0.1] Uncertainty in plxmasstat.error;pos.parallaxfloatpmRA[-6.8/2.1] Proper motion along RAmas/yrpos.pm;pos.eq.rafloate_pmRA[0.1/0.8] Uncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatpmDE[-9.1/8.8] Proper motion along DEmas/yrpos.pm;pos.eq.decfloate_pmDE[0.1/0.8] Uncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatNmm[27/520] Number of members stars in the clustermeta.numberintN17[21/358] Total number of cluster member stars with Gmag<17magmeta.numberintZ[0.0001/0.04] Metallicitylog(Sun)phys.abund.ZfloatAge[0.04/3.1] AgeGyrtime.agefloatCl[AB] Cluster class (1)meta.codechar