J/A+A/675/A28ivo://CDS.VizieR/J/A+A/675/A28doi:10.26093/cds/vizier.36750028CDSOlivares J.Lodieu N.Bejar V.J.S.Martin E.L.Zerjal M.Galli P.A.B.2024-11-28T20:04:18Z2023-06-29T07:30:39ZCDS support team

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

cds-question@unistra.fropen-star-clustersstellar-associationsOpen clusters (OCs) are fundamental benchmarks where theories of star formation and stellar evolution can be tested and validated. Coma Berenices (Coma Ber) and Latyshev 2 (Group X) are the second and third OCs closest to the Sun, making them excellent targets to search for low-mass stars and ultra-cool dwarfs. In addition, this pair will experience a flyby in 10-16Myr which makes it a benchmark to test OCs pair interactions. We aim at analysing the membership, luminosity, mass, phase-space (i.e., positions and velocities), and energy distributions for Coma Ber and Latyshev 2 and test the hypothesis of the mixing of their populations at the encounter time. We develop a new phase-space membership methodology and apply it to Gaia data. With the recovered members we infer the phase-space, luminosity and mass distributions using publicly available Bayesian inference codes. Then, with a publicly available orbit integration code and members' positions and velocities, we integrate their orbits 20Myr into the future. In Coma Ber, we identify 302 candidate members distributed in the core and tidal tails. The tails are dynamically cold and asymmetrically populated. The stellar system called Group X is made of two structures: the disrupted OC Latyshev 2 (186 candidate members) and a loose stellar association called Mecayotl 1 (146 candidate members), both of them will fly by Coma Ber in 11.3+/-0.5Myr and 14.0+/-0.6Myr, respectively, and each other in 8.1+/-1.3Myr. We study the dynamical properties of the core and tails of Coma Ber and also confirm the existence of the OC Latyshev 2 and its neighbour stellar association Mecayotl 1. Although these three systems will experience encounters we find no evidence supporting the mixing of their populations.2023A&A...675A..28Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/675/A28CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/675/A28https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/675/A28http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/675/A28https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/675/A28https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/675/A28http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/675/A28GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/675/A28/tabled1 (Properties of the 634 candidate members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/675/A28/tabled1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/675/A28/tabled1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/675/A28/tabled1?GETtext/xml+votable180.050000true182.692004337355827.28146480579060.0055555555555555565/2686 2769 2772 2843 2859 2868 7023 7032 7034 7110-7111 7120-7122 6/5235 5454 5495 5628 5631 5943 5974 5978 6008 6011 6095 6098 6116-6117 7477 8727 8807 8809 8907 8912 8915 8921 8930 8943 8948 8952-8953 8957 9005 9103 9131 9134 9155 9183 9213 9749 9852 9859 9891 9915-9916 9928 9930 9933 9940 9949 9951-9952 9961 9968-9969 9973-9974 9976 9979-9980 9982-9983 9992 10144-10146 10152 10158 10167-10168 10276 10286 10289-10290 10292 10298 10303 10321 10325 10334 10342 10361 10364 10369-10370 10387 10391 10397 10403 10409 10413 10417 10419 10425-10427 10429 10431-10432 10434 10443 10448 10455 10460 10468 10470 10477-10478 10491 10503 10513 10517-10518 10533 10540 10543 10550 10560 10562 10567 10571-10572 10581 10594 10596 10628 10630 10636 10639 10646 10653 10662 10684 10694 10696 10703 10706-10707 10710-10712 10715-10717 10725-10726 10732 10734 10741 10743 10749 10758 10787 10797 10819 10823 10834 10877 10895 10919-10920 10945 10957 10966 10972 11011 11025 11027 11029 11031 11039 11042 11044 11051 11081 11083 11087 11094 11096-11097 11099 11105 11107 11109 11111 11115 11126 11132-11133 11142 11160 11192 11202 11205 11218 11221 11225 11250 11261 11314 11317 11323 11333-11334 11336 11343 11345-11348 11350-11351 11353-11356 11358 11361 11363-11365 11367 11371 11378-11379 11382 11392-11394 11400 11402 11406 11408 11410 11412 11417-11419 11421 11424 11426 11430-11431 11444 11446 11449 11451 11453-11454 11460 11462-11463 11467 11469-11471 11476 11478 11482-11483 11489-11492 11494 11496 11498-11500 11502 11510-11512 11515-11516 11547 11554 11562 11569 11653 11666 11680 11689 11691 11779 11782 11789-11790 11792 11795 11798 11800 11804 11809 11813 11815 11818 11832 11835-11836 11839 11841 11844 11848 11852-11853 11860 11872 11911 11918 11931 12000 12012 26302 26330 26591 26741 26914 26956 26960 26976 26999 27014 27029 27037 27039 27044 27084-27085 27135 27434 27502 27773 27783 27797 27821 27860 27879 27895 27938 27943 27983 27996 28013-28014 28022 28027 28031 28071-28072 28078-28079 28083 28085 28087 28100 28105 28108 28112 28116 28118 28122-28123 28125 28127 28133-28134 28140-28141 28144 28150-28154 28156 28177 28188-28189 28198 28213 28215 28227 28241 28244 28265 28270 28272 28286-28287 28295 28304 28316 28367 28376-28377 28397 28416 28425 28431 28433 28439 28452-28453 28455 28457 28467 28469-28470 28492 28494-28496 28498 28500 28502 28504 28506 28508-28509 28515-28516 28519 28526 28528 28530 28537 28555 28560 28567 28608 28635https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/675/A28?format=asciidefaultJ/A+A/675/A28/tabled1Properties of the 634 candidate membersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source identifiermeta.id;meta.mainPmemb[0.99/1.0] Membership probability to the parent groupmeta.id.parent;stat.probability;pos.lgdoubleRA_ICRS[152.39/253.11] Gaia DR3 Right Ascencion (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRS[-6.87/73.23] Gaia DR3 Declination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainmeanX[-109.68/-20.25] Mean X coordinatepcpos.cartesian.x;pos.galacticdoubles_meanX[0.04/3.05] Standard deviation of the X coordinatepcstat.stdev;pos.cartesian.xfloatmeanY[-81.84/55.66] Mean Y coordinatepcpos.cartesian.y;pos.galacticfloats_meanY[0.0/3.23] Standard deviation of the Y coordinatepcstat.stdev;pos.cartesian.yfloatmeanZ[-13.52/113.33] Mean Z coordinatepcpos.cartesian.z;pos.galacticdoubles_meanZ[0.02/4.18] Standard deviation of the Z coordinatepcstat.stdev;pos.cartesian.zfloatmeanU[-5.2/-0.09] Mean U coordinatekm/spos.cartesian.xfloats_meanU[0.03/0.86] Standard deviation of the U coordinatekm/sstat.stdev;pos.cartesian.xfloatmeanV[1.37/8.94] Mean V coordinatekm/spos.cartesian.yfloats_meanV[0.01/0.69] Standard deviation of the V coordinatekm/sstat.stdev;pos.cartesian.yfloatmeanW[-9.23/-1.5] Mean W coordinatekm/spos.cartesian.z;stat.meanfloats_meanW[0.01/1.32] Standard deviation of the W coordinatekm/sstat.stdev;pos.cartesian.zfloatb_Mass[0.06/2.08] Percentil 2.5 of the mass distributionsolMassphys.massdoubleMass[0.06/2.5] Maximum-A-Posteriori of the mass distributionsolMassphys.massdoubleB_Mass[0.06/2.49] Percentil 97.5 of the mass distributionsolMassphys.massdoubleb_AV[0.0/0.03] Percentil 2.5 of the Av distributionmagphot.magdoubleAV[0.0/0.1] Maximum-A-Posteriori of the Av distributionmagphys.absorptiondoubleB_AV[0.07/0.1] Percentil 97.5 of the Av distributionmagphot.magdoubleSimbadSimbad column added by the CDSmeta.ref.urlcharGroupParent groupmeta.id.parent;pos.lgchar