J/A+A/661/A118ivo://CDS.VizieR/J/A+A/661/A118doi:10.26093/cds/vizier.36610118CDSCastro-Ginard A.Jordi C.Luri X.Cantat-Gaudin T.CarrascoJ.M.,Casamiquela L.Anders F.Balaguer-Nunez L.Badia R.M.2024-10-18T20:00:55Z2022-05-24T07:54:58ZCDS support team

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

cds-question@unistra.frsurveysopen-star-clustersvisible-astronomytrigonometric-parallaxproper-motionsradial-velocityThe improvements in the precision of the published data in Gaia EDR3 with respect to Gaia DR2, particularly for parallaxes and proper motions, offer the opportunity to increase the number of known open clusters in the Milky Way by detecting farther and fainter objects that have so far go unnoticed. Our aim is to keep completing the open cluster census in the Milky Way with the detection of new stellar groups in the Galactic disc. We use Gaia EDR3 up to magnitude G=18mag, increasing in one unit the magnitude limit and therefore the search volume explored in our previous studies. We use the OCfinder method to search for new open clusters in Gaia EDR3 using a Big Data environment. As a first step, OCfinder identifies stellar statistical overdensities in the five dimensional astrometric space (position, parallax and proper motions) using the DBSCAN clustering algorithm. Then, these overdensities are classified into random statistical overdensities or real physical open clusters using a deep artificial neural network trained on well-characterised G, G_BP_-G_RP_ colour-magnitude diagrams. We report the discovery of 628 new open clusters within the Galactic disc, most of them located beyond 1 kpc from the Sun. From the estimation of ages, distances and line-of-sight extinctions of these open clusters, we see that young clusters align following the Galactic spiral arms while older ones are dispersed in the Galactic disc. Furthermore, we find that most open clusters are located at low Galactic altitudes with the exception of a few groups older than 1Gyr. We show the success of the OCfinder method leading to the discovery of a total of 1310 open clusters (joining the discoveries here with the previous ones based on Gaia DR2), which represents almost 50% of the know population. Our ability to perform big data searches on a large volume of the Galactic disc, together with the higher precision in Gaia EDR3, enable us to keep completing the census with the discovery of new open clusters.2022A&A...661A.118Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/661/A118CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/627/A35 : New open clusters in Galactic anti-centre (Castro-Ginard+ 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/661/A118https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/661/A118http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/661/A118https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/661/A118https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/661/A118http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/661/A118GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/661/A118/table1 (Mean parameters for the reported UBC clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/661/A118/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/661/A118/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/661/A118/table1?GETtext/xml+votable180.050000true267.36-29.230.005555555555555556Cone search capability for table J/A+A/661/A118/table2 (Members for the reported UBC clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/661/A118/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/661/A118/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/661/A118/table2?GETtext/xml+votable180.050000true267.525044223617-29.36419050754710.0055555555555555565/744 763 766 826 931 3566 3577 3580 3607 3657 3660 3846 5207 5985 5996 6095 6119 7290-7291 7378 7381 7561 7576 7663 9436 9466 9477 9482 9943 9948 6/1268 1270 1286 1296 1304 1319 1330-1331 1346 1353 1363 1412 1414 1425-1428 1432 1435 1438 1451 1453-1455 1457-1458 1460-1461 1464 1467 1473 1631 1747 1752-1753 1757 1759 1776 1781 1783-1784 1786 1793 1795 1800-1802 1807 1829 1841-1843 1953-1955 1966-1967 2910-2911 2935 2980 2997 3001 3004 3006-3007 3024 3026 3033 3036 3042-3043 3048-3049 3062 3068 3087 3098 3136 3141-3143 3147 3152 3263 3267 3272-3274 3278 3296-3297 3300 3308 3310 3317 3321 3324 3336-3337 3360 3590-3591 3597-3599 3602 3608 3615 3620-3621 3631 3633-3635 3637 3640-3642 3644 3658-3659 3673-3675 3680-3681 3712-3714 3717 3721 3723 3728 3733 3739 3741 3745 3747 3760-3761 11258 12954 12965 12970 12976 12986 12988 13230 13277 13291 13294 13813-13815 13939 13945 13948 13964 14017 14020 14034 14060 14073 14150 14156 14232 14239 14243-14244 14246-14247 14249 14251-14254 14257 14259-14262 14268 14283 14287 14293-14295 14298-14299 14305 14324-14325 14327 14333 14336 14354-14355 14360-14361 14406 14412 14414-14415 14422 14425-14427 14437 14448-14449 14451 14453-14455 14460 14462 14600 14602 14606 14619 14622-14625 14636-14637 14644 14647 14653 14656 14658 14661 14666 14672 14686-14688 14696 14703 14714-14715 14717 14719 14772 14774 14807 15361 15364 15366-15367 15372-15374 15376-15377 15379 15390 15394-15396 15398-15399 15404 15410-15411 15424-15425 15428 15431-15432 15440 15442 15444-15446 15451-15452 15455 15462-15463 15470-15471 15473 15492-15493 15504 15571 15618-15621 15624 15626 15630 15632-15633 15652 15654 15683 15693 15707 20816-20818 20820-20821 20823 20945 20947 21508 21510 21512 21515 21530 21549 21551 21555 21562-21563 21578 21635 21641 21643-21644 21646 21658 21660-21661 21671-21672 21677 21680 21685 21706-21707 21729 21731-21732 21734 22022 22030-22031 22044 22046 22064 22066-22067 22071 22078-22079 22081 22084 22094 22104 22106-22107 22114 22117 22122 22124 22128 22143 22164-22165 22193 22197 22217 22219-22222 22231-22232 22240 22268 22314 22400 23567 23577-23578 23620 23623 23629 23640 23654 23656 23658 23667 23670 23701 23765 23767 23809 23811-23812 23814 23822 23948-23949 23953 23955 23962 23975 23995 23998 24151 24322 24325 24344 24363-24365 24369 24379 24418 24424 24449 24452-24453 24465 24470-24472 24501 24506 24513-24514 24521 24523 24538 24545 28819 28821 28823 28825 28828-28829 28872 28879 28890 28900 28917 29088 29090 29094-29095 29098 29100-29101 29106 29112 29117 29157 29182-29183 29456-29457 29459 29505 29507-29508 29510 29516-29517 29519 29521-29523 29529 29532 29557 29865 30214 30218-30219 30222 30233-30234 30240 30256 30259 30269-30271 30288 30312-30313 30332 30334 30459 30510 30638 30648-30650 30685 30692 30707 30710 30717 30719 32029 32072 32085 37227 37230 37245-37246 37334-37335 37337 37340 37342-37343 37361 37365 37373-37375 37687 37702 37708 37716-37717 37719 37722 37724-37725 37741-37743 37750-37751 37753 37755 37757 37782 37785 37788 37828 37855 37857 37859 37861 37869 37871 37875 37880 37883 37891 37894 37896 37898 37902-37903 37905 37907 37912 37914 37916-37917 37922-37923 37932 37934-37935 37947 37965-37967 37970-37971 37991 38002 38017 38020 38022 38411 38437 38538 38571 39215 39219 39222-39223 39229 39237 39244 39247-39249 39258 39264-39265 39293 39315 39325 39357 39359 39367-39368 39373-39375 39378 39386-39387 39390-39391 39394 39400 39405 39409-39414 39416 39422-39423 39686-39687 39748 39751 39754 39760-39761 39763-39764 39766-39767 39769-39771 39776 39779 39781-39783 39788 39796-39798 39802-39804 39807 39890-39891 39894 39901 39925 39945 39947 39970 39976 40106 40459 40480 40482 40487 40493 40578 40587 40590 40608-40609 40618-40620 41461 41586-41587 41593 41596-41598 41622 41627 41630-41631 41649 41651-41652 41663 41667 41681 41699 41702 41742 41745 41756-41757 41761 41763-41764 41766 41770 41773 41775 41784 41795 41800 41813 41857-41858 41864-41865 42153 42156-42157 42159 42170 42172 42174 42206-42207 42210 42212-42214 42224-42225 42227-42230 42232-42233 42346 42378-42379 42383 42386 42405 42407 42435 42438 42441 42496 42502 42512 43009-43011 43017-43020 43025-43030 43040 43042-43043 43048-43049 43271 432821.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/661/A118?format=asciiOpticaldefaultJ/A+A/661/A118/table1Mean parameters for the reported UBC clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster name (UBCNNN)meta.id.parentcharRA_ICRSRight Ascension mean (ICRS) at Ep=2015.5degpos.eq.ra;meta.mains_RA_ICRSRight Ascension standard deviationdegpos.eq.rafloatDE_ICRSDeclination mean (ICRS) at Ep=2015.5degpos.eq.dec;meta.mains_DE_ICRSDeclination standard deviationdegstat.stdev;pos.eq.decfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_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.decindexedpmDEProper motion in declination meanmas/yrpos.pm;pos.eq.decfloats_pmDEProper motion in declination standard deviationmas/yrstat.stdev;pos.pm;pos.eq.decfloats_RV? Radial velocity standard deviationkm/sstat.stdev;spect.dopplerVelocfloatnullableNmembNumber of cluster membersmeta.numberintNmembRVNumber of cluster members with radial velocity measurementsmeta.numberintFlag[a] Note (1)meta.code.errorcharlogAgeLogarithm of the cluster agelog(yr)time.agefloatDistDistance to the clusterpcpos.distancefloatAVLine-of-sight extinctionphys.absorptionfloatSeq[0/627] cluster sequential numbermeta.recordintGLONGalactic longitude meandegpos.galactic.lons_GLONGalactic longitude standard deviationdegstat.stdev;pos.galactic.lonfloatGLATGalactic latitude meandegpos.galactic.latfloats_GLATGalactic latitude standard deviationdegstat.stdev;pos.galactic.latfloatplxParallax meanmaspos.parallax;stat.meanfloats_plxParallax standard deviationmasstat.stdev;pos.parallaxfloatpmRAProper motion in right ascension mean, pmRA*cosDEmas/yrpos.pm;pos.eq.rafloats_pmRAProper motion in right ascension standard deviationmas/yrstat.stdev;pos.pm;pos.eq.rafloatRV? Radial velocity meankm/sphys.veloc;pos.heliocentricfloatnullableJ/A+A/661/A118/table2Members for the reported UBC clustersSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster name (UBCNNNN)meta.id.parentcharGaiaEDR3Gaia EDR3 source_idmeta.id;meta.mainRA_ICRSRight Ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainindexedGLONGalactic longitudedegpos.galactic.lonGLATGalactic latitudedegpos.galactic.latdoubleplxParallaxmaspos.parallax.trigdoublepmRAProper motion in right ascension, pmRA*cosDEmas/yrpos.pm;pos.eq.radoublepmDEProper motion in declinationmas/yrpos.pm;pos.eq.decdoubleRV? Radial velocitykm/sphys.veloc;pos.heliocentricdoublenullableGmagGaia G magnitudemagphot.mag;em.optdouble_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.decindexedBP-RP? Gaia BP-RP colourmagphot.color;em.opt.B;em.opt.RdoublenullableSeq[0/25465] Star sequential numbermeta.recordint