J/A+A/708/A161ivo://CDS.VizieR/J/A+A/708/A161CDSPagnini G.Di Matteo P.Haywood M.Bianchini P.Ferrone S.,Mastrobuono-Battisti A.Agertz O.Khoperskov S.Renaud F.Ryde N.2026-05-04T07:43:19Z2026-04-03T11:46:04ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starschemical-abundancesinfrared-astronomyGlobular clusters (GCs) and their associated stellar streams are key tracers of the hierarchical assembly history of the Milky Way. omega Centauri, the most massive and chemically complex GC in the Galaxy, is widely believed to be the remnant nucleus of an accreted dwarf galaxy. Identifying its associated debris and that of chemically similar clusters can provide important constraints on the nature of this progenitor system. We aim to identify stars in the Galactic field that are chemically and kinematically associated with omega Cen and with a group of GCs hypothesised to share a common origin. This group, recently proposed to form a coherent system named Nephele, may represent the remnants of a single, massive accretion event. We analysed APOGEE DR17 data to select field stars with high-quality chemical abundances. We applied a Gaussian mixture model (GMM) in an 8D chemical abundance space to identify stars compatible with omega Cen chemistry. We then computed the orbital energy and angular momentum of these stars and applied a second GMM, calibrated on simulations from the e-TidalGCs project, to determine the kinematic compatibility with the predicted streams of omega Cen and the associated Nephele GCs. We identify 470 stars chemically compatible with omega Cen, of which 58 are also Al-rich, consistent with second-generation stars found in GCs. Of these, six stars show kinematics consistent with the predicted omega Cen stream, and additional stars are linked to the tidal streams of NGC 6205, NGC 6254, NGC 6273, NGC 6656, and NGC 6809. These findings suggest the presence of extended stellar streams that have not been previously detected. We also find overlap in chemical and kinematic properties between Nephele stars and the Gaia Sausage-Enceladus population. Our results suggest the presence of stellar debris associated with omega Cen and its candidate family of GCs. The combined chemical and kinematic analysis supports the scenario in which these systems originated in a common progenitor, which has now been disrupted. While uncertainties remain-particularly due to disc contamination and limited sky coverage - this work illustrates the potential of chemical and dynamical methods to trace the remnants of past accretion events in the inner Galaxy.2026A&A...708A.161Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/708/A161CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/708/A161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/708/A161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/708/A161https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/708/A161https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/708/A161http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/708/A161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/708/A161/table1 (*APOGEE DR17 Nephele candidate stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/708/A161/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/708/A161/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/708/A161/table1?GETtext/xml+votable180.050000true2.0709747-51.53515140.0055555555555555565/2455 7337 10711 10746 11088 6/165 378 415 460 476 545 551 555 825 1015 1324 1390 1480 1532 1696-1697 1825 1922 2041 2157 2351 2385 2433 2441 2516 2621 2946 3084 3229 4033 4074 4077 4121 4129 4133 4253 4279 4433 4448 4464 4488 4538 4667 4714 4719 4729 4735 4745 4765 4772-4773 4787 4791 4803 4820 4838 4847 4852 4855 4880 4964 5029 5037 5062 5108 5145 5147 5337 5372 5523 5529 5548 5555 5581 5605 5613-5614 5618 5626 5658 5670 5672 5688 5740 5755 5800 5807 5843 5860 5868 5890 5905 5908 5919-5920 5952 5963 5970 5975 5981 5984 6149 6246 6252 6268 6393 6458 6504 6542 6619 6644 6651 6993 7233 7314-7315 7323 7330 7333 7335 7337 7362 7743 7749 7785 7862 7880 7951 8095 8246 8255 8263 8270 8273 8275-8277 8281-8282 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17354 17383 17563 17585 17587 17610 17671 17682 17691 17770 17773 17810 18009 18035 18046 18077 18093 18102 18115 18165 18223 18230 18329 18335 18346 18426 18430 18436 18451 18474 18478 18488 18533 18539 18544 18560 18564 18570-18572 18579 18581 18605 18630 18633 18635-18636 18648-18649 18665 18695 18700-18701 18709 18726 18729 18732 18734 18742 18746-18747 18770 18776 18780 18836 18855 18947 18949 19030 19045 19084 19090 19093 19099-19100 19120 19229 19326 19388 19698 19727 19738 19980 20785 20919 21458 21865 21868 22254 22290 22867 22882 23047 23186 23234 23369 23547 23593 23695 23704 24001 24191 24438 24842-24843 24962 24969 25334 25353 25356 25385 25403 25427 25488 25490 25549 25585 25605 25607 25616 25618 25627 25645-25646 25653 25662 25675 25693 25695 25705 25854-25855 25861 25878 25880-25881 25938-25939 25942 25979-25980 26029 26036 26039 26044 26047 26058 26075 26098 26115 26118 26121 26166 26171 26179 26185 26187 26249 26252 26262 26281 26283 26595 26600 26602 26604 26653 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37561-37562 37579 37610 37653 37680 37794 37969 38132-38133 38464 38916 38919-38920 38924 38930 38936 38950-38951 38955 38957 39044 39049 39078 39425 39541 39862 40290 40296 40510 40581 40628 40667 40817 41189-41190 41346 41482 41504 41641 41974-41975 42058 42073 42081 42145 42242 42250-42251 42261 42354 42417 42420 42473 42476 42507 42570-42571 42582-42583 42589 42592 42614 42617 42620 42622 42638 42660-42661 42707-42708 42713 42716 42815 42856 42858-42859 42870 42875 42878 42886-42887 42893 42904 42939 42941 42946 42952 42955 42964-42965 42978 42980 42983 42989 42991 43000 43002 43055 43224-43225 43227 43534 43536 43825-43826 44305 44309-44311 44317 44319 44358 44360-44362 44364 44385 44388-44390 44771 44777 45000 45002 45024 45802 45894 45900 46262-46263 46271 46342 46620 46846 47021 47034 47055 47061-47063 47072 47658 47742 47780 47798 47852-47853 47970-47971 47976 48028-48029 48031 48034-48035 48042-48045 48048 48070 48098 48122-48123 48212-48213 48482 48488 48608-48609 48611 48811 49018 49093 49102 49121-49122 49128 49147https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/708/A161?format=asciiInfrareddefaultJ/A+A/708/A161/table1*APOGEE DR17 Nephele candidate starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAPOGEEAPOGEE DR17 identifier based on the 2MASS designationmeta.id;meta.maincharPcompProbability of compatibility with omega Centauri (1)stat.fit.goodnessfloatAlRichAluminum-enhancement flag (True/False) (2)meta.codecharNepheleNephele candidate flag (True/False) (3)meta.codecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main