J/A+A/627/A119ivo://CDS.VizieR/J/A+A/627/A119doi:10.26093/cds/vizier.36270119CDSCarrera R.Pasquato M.Vallenari A.Balaguer-Nunez L.,Cantat-Gaudin T.Mapelli M.Bragaglia A.Bossini D.Jordi C.,Galadi-Enriquez D.Solano E.2021-02-05T08:47:04Z2019-07-11T09:34:16ZCDS support team

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

cds-question@unistra.fropen-star-clustersstellar-populationsNGC 2682 is a nearby open cluster that is approximately 3.5Gyr old. Dynamically, most open clusters are expected to dissolve on shorter timescales of ~=1Gyr. That it has survived until now means that NGC 2682 was likely much more massive in the past and is bound to have an interesting dynamical history. We investigate the spatial distribution of the stars in NGC 2682 to constrain dynamical evolution of the cluster. We particularly focus on the marginally bound stars in the cluster outskirts. We used Gaia DR2 data to identify NGC 2682 members up to a distance of ~150pc (10{deg}). The two methods Clusterix and UPMASK were applied to this end. We estimated distances to obtain 3D stellar positions using a Bayesian approach to parallax inversion, with an appropriate prior for star clusters. We calculated the orbit of NGC 2682 using the GRAVPOT16 software. The cluster extends up to 200' (50pc), which implies that its size is at least twice as large as previously believed. This exceeds the cluster Hill sphere based on the Galactic potential at the distance of NGC 2682. The extra-tidal stars in NGC 2682 may originate from external perturbations such as disc-shocking or dynamical evaporation from two-body relaxation. The former origin is plausible given the orbit of NGC 2682, which crossed the Galactic disc ~=40Myr ago.2019A&A...627A.119Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A119CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/627/A119https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/627/A119http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/627/A119https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/627/A119https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/627/A119http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/627/A119GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/627/A119/table (Stellar and membership probabilities used in this study)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/627/A119/table?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/627/A119/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/627/A119/table?GETtext/xml+votable180.050000true132.9979611.9180.0055555555555555565/1063 1074 6/4120 4122 4125 4127 4136-4137 4144 4147 4159 4193 4202 4225 4228 4251 4268 4270 4273 4276-4277 4283 4286 4289-4291 4294 4300 4302 4320-4322 4330 4613 4617 4623 4631 4661 4680 4687 4711 4864 21877 21981 22005 220131.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/627/A119?format=asciidefaultJ/A+A/627/A119/tableStellar and membership probabilities used in this studyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarStar identification (Gaia DR2 sourve_id)meta.id;meta.mainRA_ICRSGaia DR2 right ascension (ICRS) at epoch 2015.5degpos.eq.ra;meta.mainDE_ICRSGaia DR2 declination (ICRS) at epoch 2015.5degpos.eq.dec;meta.mainPlxGaia DR2 parallaxmaspos.parallaxfloatpmRAGaia DR2 proper motion along RA, pmRA*cosDEmas/yrpos.pm;pos.eq.rafloatpmDEGaia DR2 proper motion along DEmas/yrpos.pm;pos.eq.decfloatGmagGaia DR2 mean G magnitudemagphot.mag;em.optfloatBPmagGaia DR2 mean BP magnitudemagphot.mag;em.opt.BfloatRPmagGaia DR2 mean RP magnitudemagphot.mag;em.opt.RfloatType[1/6] Star type (1)meta.code.classintPupmaskUPMASK membership probabilitystat.probabilityfloatPclusterixClusterix membership probabilitystat.probabilityfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decnullableindexed