J/AJ/164/54ivo://CDS.VizieR/J/AJ/164/54doi:10.26093/cds/vizier.51640054CDSZhong J.Chen LiJiang Y.Qin S.Hou J.2023-01-24T12:47:54Z2022-11-08T06:44:05ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomytrigonometric-parallaxproper-motionsWith the help of Gaia data, it is noted that in addition to the core components, there are low-density outer halo components in the extended region of open clusters. In order to study the extended structure beyond the core radius of the cluster (~10pc), based on Gaia Early Data Release 3, taking up to 50pc as the searching radius, we use the pyUPMASK algorithm to redetermine the member stars of the open cluster within 1-2kpc. We obtain the member stars of 256 open clusters, especially those located in the outer halo region of open clusters. Furthermore, we find that the radial density profile in the outer region for most open clusters deviates from the Kings profile. In order to better describe the internal and external structural characteristics of open clusters, we propose a two-component model: a core component with a King model distribution and an outer halo component with a logarithmic Gaussian distribution, and then suggest using four radii (rc, rt, ro, re) for describing the structure and distribution profile of star clusters, where rt and re represent the boundaries of the core component and outer halo component, respectively. Finally, we provide a catalog of 256 clusters with structural parameters. In addition, our study shows the sizes of these radii are statistically linearly related, which indicates that the inner and outer regions of the cluster are interrelated and follow similar evolutionary processes. Further, we show that the structure of two components can be used to better trace the cluster evolution properties at different stages.2022AJ....164...54Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/164/54CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/ocl : Optically visible open clusters and Candidates (Dias+ 2002-2015)J/A+A/543/A156 : Milky Way global survey of star clusters (Kharchenko+, 2012)J/A+A/558/A53 : Milky Way global survey star clusters. II. (Kharchenko+, 2013)J/AJ/145/37 : UBVI and H{alpha} CCD photometry of NGC 6231 (Sung+, 2013)J/A+A/584/A91 : Catalog of dense cores Aquila from Herschel (Konyves+, 2015)J/MNRAS/456/3757 : Open-cluster density profiles (Seleznev, 2016)J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)J/A+A/624/A126 : New open clusters in Perseus direction (Cantat-Gaudin+, 2019)J/A+A/627/A119 : Extended halo of NGC 2682 (M 67) (Carrera+ 2019)J/A+A/621/L3 : Hyades tidal tails with Gaia DR2 (Meingast+, 2019)J/A+A/627/A4 : Praesepe (NGC 2632) and its tidal tails (Roeser+, 2019)J/A+A/621/L2 : Hyades tidal tails revealed by Gaia DR2 (Roeser+, 2019)J/A+A/640/A1 : Portrait Galactic disc (Cantat-Gaudin+, 2020)J/ApJ/889/99 : Gaia DR2 Blanco 1 member candidates (Zhang+, 2020)J/A+A/645/A84 : Coronae of nearby star clusters (Meingast+, 2021)J/other/ApSS/366.92 : Stars in Alessi-Teutsch 9 (ASCC 10) (Sanchez+, 2021)J/A+A/659/A59 : Structural parameters 389 local open clusters (Tarricq+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/164/54https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/164/54http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/164/54https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/164/54https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/164/54http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/164/54GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/164/54/table1 (Open cluster catalog with structural parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/164/54/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/164/54/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/164/54/table1?GETtext/xml+votable180.050000true125.833-36.3490.0055555555555555566/1072 1119 1267 1296-1297 1302 1321 1325 1332 1464 1482 1661 1718 1752 1757 1789 1825 1930 2517 2994 3009 3034-3035 3045 3066 3145 3149 3227 3308 3362 3384 3584 3613 3654 3680 3712 4078 6307 6894 12955 12985 13048 13050 13052 13055 13198 13225 13286 13304 14013 14033 14046 14129 14134 14229 14267 14288 14322 14330 14370 14373 14384 14404 14438 14623-14624 14629 14638 14653 14689 14697 14732 14749 14816 15121 15376 15385 15395 15404 15412 15430 15462 15497 15595 15650 15659 20951 20957 20966 21509-21510 21522-21523 21538 21549 21561 21647 21656 21691 22030 22053 22066 22107 22146 22314 22499 22871 23632-23633 23769 23784 23797 23801 23803 23807 23936 23950 24032 24121 24130 24329 24372 24461 24491 24513 24522 28716 28807 28824 28901 28916 29082 29115 29118 29154 29180 29463 29497 29517 29868 30223 30235 30287 30609 30626 30635 30700 32016-32017 37200 37212 37252 37297 37327 37335 37351 37705 37707 37712 37722 37725 37729 37737 37739 37745 37753 37755 37789 37819 37859 37869 37906 37920 37948 38021 38041 38052 38242 38432 38562 39210 39233 39290 39326 39356 39385 39397 39404 39783 39894 39901 39912 39919 39929 40101 40104 40490 40620 40625 40696 41455 41466 41559 41577-41578 41595 41638 41643 41670 41688 41690 41753 41771 41774 41789 41829 41858 41873-41874 41878 41893 42127 42135 42174 42177 42197 42203 42230 42384 42390 42399 42402 42416 42450 42456 42464 42836 42964 43017 43022 43035-43036 43044 43048 43059 43137https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/164/54?format=asciiOpticaldefaultJ/AJ/164/54/table1Open cluster catalog with structural parametersSimbadNameSimbad column added by the CDSmeta.idcharnullableFlagLabel of cluster samples (2)meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster name in CG20 (1)meta.id;meta.maincharRA_ICRS[0.5/354] Mean right ascension of members in CG20, (ICRS) at Ep=2015.5 (1)degpos.eq.ra;meta.mainDE_ICRS[-71/86] Mean declination of members in CG20, (ICRS) at Ep=2015.5 (1)degpos.eq.dec;meta.mainpmRA[-11.4/7.68] Mean proper motion along RA of members in CG20, pmRA*cosDE (1)mas/yrpos.pm;pos.eq.rafloatpmDE[-9.74/12] Mean proper motion along DE of members in CG20 (1)mas/yrpos.pm;pos.eq.decfloatplx[0.44/1.06] Mean parallax members in CG20 (1)maspos.parallax.trigfloatDist[1003/1992] Most likely distance of clusters in CG20 (1)pcphot.mag.distModint_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.decnullableindexedAge[7.0/9.85] Estimated cluster age in CG20 (1)log(yr)time.agefloatKDE[0.271/0.589] Bandwidth of kernel density estimationstat.fit.paramfloatAngh[0.03/2.31] Angular size of half number radiusdegmeta.number;phys.angSizefloatAngc[0.06/2.3] Angular size of King's core radius derived by the core membersdegphys.angSizefloate_Angc[0.001/3] Measurement uncertainty of Angcdegstat.errorfloatAngt[0.11/6.9] Angular size of King's tidal radius derived by the core membersdegphys.angSizefloate_Angt[0.003/9] Measurement uncertainty of Angtdegstat.errorfloatAngo[0.09/2.63]? Angular size of mean radius of outer halo membersdegphys.angSize;stat.meanfloatnullablee_Ango[0/0.13]? Measurement uncertainty of Angodegstat.errorfloatnullableAnge[0.19/7.43]? Angular size of boundary radius of outer halo membersdegphys.angSizefloatnullablee_Ange[0.003/2]? Measurement uncertainty of Angedegstat.errorfloatnullableRadh[1.3/58] Physical size of half number radiuspcmeta.number;phys.size.radiusfloatRadc[2.1/54.5] Physical size of King's core radius derived by the core memberspcphys.size.radiusfloatRadt[3.6/214] Physical size of King's tidal radius derived by the core memberspcphys.size.radiusfloatRado[2.8/61.2]? Physical size of mean radius of outer halo memberspcphys.size.radius;stat.meanfloatnullableRade[6.3/149]? Physical size of boundary radius of outer halo memberspcphys.size.radiusfloatnullable