J/AJ/169/219ivo://CDS.VizieR/J/AJ/169/219CDSCui Q.He Z.Deng S.Peng L.Li C.Luo Y.Wang K.2026-05-19T12:09:20Z2026-05-19T13:05:57ZCDS support team

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

cds-question@unistra.fropen-star-clustersphotometryproper-motionsvisible-astronomytrigonometric-parallaxWe identified blue straggler stars (BSSs) in 53 open clusters utilizing data from Gaia DR3. Most of these clusters are situated in the outer regions of the Galactic disk, encompassing structures such as the warp and the Outer arm. We analyzed their astrometric parameters and determined that 48 of them demonstrate high reliability in the radial density profile. Furthermore, through manual isochrone fitting and visual inspection, we confirmed 119 BSS candidates and identified 328 additional possible candidates within these clusters. Our results contribute to a 46% increase in the sample size of BSSs in open clusters for regions of the Galactic disk where Rgc>12kpc. We observed that the new samples are fainter compared to those identified in the past. Additionally, we investigated the maximum fractional mass excess (Me) of the BSSs in open clusters, including previously published BSS samples. Our findings indicate a strong correlation between the capability to produce highest-Me BSSs and the mass of their host clusters. This observation appears to reinforce a fundamental principle whereby an increase in the mass of a star cluster correlates with a higher likelihood of stellar mergers. In contrast, we observe minimal correlation between maximum-Me and the cluster age. Among clusters containing BSSs, younger clusters (0.5-1Gyr) display a scarcity of high-Me BSSs. This scarcity may be attributed to the absence of more massive clusters within this age range.2025AJ....169..219Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/169/219CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/169/219https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/169/219http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/169/219https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/169/219https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/169/219http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/169/219GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/169/219/table1 (Parameters for the 53 star clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/169/219/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/169/219/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/169/219/table1?GETtext/xml+votable180.050000true102.571695.729470.005555555555555556Cone search capability for table J/AJ/169/219/table2 (Gaia DR3 parameters of blue stragglers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/169/219/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/169/219/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/169/219/table2?GETtext/xml+votable180.050000true102.56672615.732672120.0055555555555555566/1238-1239 1244 1822 1829 1844 1976 2999 3024 3042 3066 3349 3392 3723 3726 3745 3748 3795 3798 12966 13815 14302-14303 14424-14425 14427 14484 14637 14650 14718 14736 14806 14809 15382 15489 15671 15695 15706 15710-15711 20958 21558 22070 22111 22235 22238 22410 22432 24524 24526 29509 30329 30331 37198 37217 37220 37375 37687 37703-37704 37709 37717 37739 37741 37925 37931 38034 39217 39348 39380 39735 39917 39919 41674 43008 43017 43038 430601.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/169/219?format=asciiOpticaldefaultJ/AJ/169/219/table1Parameters for the 53 star clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster identifiermeta.id;meta.maincharGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latPlxGaia DR3 parallaxmaspos.parallaxfloatpmRAGaia DR3 median proper motion along R.A.mas/yrpos.pm;pos.eq.rafloatpmDEGaia DR3 median proper motion along Dec.mas/yrpos.pm;pos.eq.decfloatlogAgeLogarithmic age, log(Age/yr)log(yr)time.agefloatA0Extinctionmagphys.absorptionfloatOCTypeOpen cluster classification (1)src.classcharrc? Core radiuspcphys.size.radiusfloatnullables_rc? Dispersion in core radiuspcphys.size.radiusfloatnullablerb? Boundary radiuspcphys.size.radiusfloatnullables_rb? Dispersion in boundary radiuspcphys.size.radiusfloatnullable_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedrt? Tidal radiuspcphys.size.radiusfloatnullables_rt? Dispersion in tidal radiuspcphys.size.radiusfloatnullableNTypeINumber of Type I BSSsmeta.numberintNTypeIINumber of Type II BSSsmeta.numberintJ/AJ/169/219/table2Gaia DR3 parameters of blue stragglers_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.raindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster identifiermeta.id.parentcharGaiaDR3Gaia DR3 source identifiermeta.id;meta.mainGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latPlxGaia DR3 parallaxmaspos.parallaxdoublepmRAGaia DR3 proper motion along R.A.mas/yrpos.pm;pos.eq.radoublepmDEGaia DR3 proper motion along Dec.mas/yrpos.pm;pos.eq.decdoubleGmagGaia DR3 G-band magnitudemagphot.mag;em.optfloatBP-RPGaia DR3 BP-RP colour indexmagphot.color;em.opt.B;em.opt.RfloatRUWERenormalised unit weight errorstat.errorfloatMeFractional mass excessphys.mass;arith.ratiodoubleTypeBSS classification (1)src.classchar