J/A+A/647/A137ivo://CDS.VizieR/J/A+A/647/A137doi:10.26093/cds/vizier.36470137CDSJerabkova T.Boffin H.M.J.Beccari G.de Marchi G.de Bruijne J.H.J.,Prusti T.2025-08-21T20:00:48Z2021-03-24T07:48:42ZCDS support team

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

cds-question@unistra.fropen-star-clustersproper-motionsThe tidal tails of stellar clusters provide an important tool for studying the birth conditions of the clusters and their evolution, coupling, and interaction with the Galactic potential. The Gaia satellite, with its high-quality astrometric data, opened this field of study, allowing us to observe large-scale tidal tails. Theoretical models of tidal-tail formation and evolution are available. However, the exact appearance of tidal features as seen in the Gaia catalogue has not yet been studied. Here we present the $N-$body evolution of a Hyades-like stellar cluster with backward-integrated initial conditions on a realistic 3D orbit in the Milky Way (MW) galaxy computed within the AMUSE framework. For the first time, we explore the effect of the initial cluster rotation and the presence of lumps in the Galactic potential on the formation and evolution of tidal tails. For all of our simulations we present Gaia observables and derived parameters in the CP diagram. We show that the tidal tails are not naturally clustered in any coordinate system and that they can span up to 40 km/s relative to the cluster centre in proper motions for a cluster age of 600-700Myr. Models with initial rotation result in significant differences in the cluster mass loss and follow different angular momentum time evolution. Thus the orientation of the tidal tails relative to the motion vector of the cluster and the current cluster angular momentum constrain the initial rotation of the cluster. We highlight the use of the standard CP method in searches for co-moving groups and introduce a new compact CP (CCP) method that accounts for internal kinematics based on an assumed model. Using the CCP method, we are able to recover candidate members of the Hyades tidal tails in the Gaia Data Release 2 (DR2) and early Data Release 3 (eDR3) reaching a total extent of almost 1kpc. We confirm the previously noted asymmetry in the detected tidal tails. In the eDR3 data we recovered spatial overdensities in the leading and trailing tails that are kinematically consistent with being epicyclic overdensities and thus would present candidates for the first such detection in an open star cluster. We show that the epicyclic overdensities are able to provide constraints not only on the cluster properties, but also on the Galactic potential. Finally, based on N-body simulations, a close encounter with a massive Galactic lump can explain the observed asymmetry in the tidal tails of the Hyades.2021A&A...647A.137Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/647/A137CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/345 : Gaia DR2 (Gaia Collaboration, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/647/A137https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/647/A137http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/647/A137https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/647/A137https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/647/A137http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/647/A137GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/647/A137/tableb1 (Final selection of tidal tail members in Gaia DR2 data based on model M1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A137/tableb1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A137/tableb1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A137/tableb1?GETtext/xml+votable180.050000true322.7057247543581351.2135785884682950.005555555555555556Cone search capability for table J/A+A/647/A137/tableb2 (Final selection of tidal tail members in Gaia eDR3 data based of model M5)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/647/A137/tableb2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/647/A137/tableb2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/647/A137/tableb2?GETtext/xml+votable180.050000true135.08999514935667-55.267084741195030.0055555555555555565/80 84 87 256 261 3509 3517 3534 3554 3562 3860 5869 5873 5875-5876 5880-5881 5883-5884 5886-5887 5934 6050 6052 6058-6059 6/78 94 120 197 247 260 265 272 274 279 281 303 305 309 311 313 315 318 325-326 330 333-335 340-342 344 353 355 357-358 360-361 365-369 373-374 378 381-383 390 401 405 407 422 426-427 438 450 458 462 465-466 470 472 478 481 483 490 499 506-507 601 663 671 701 749 770 784 835 840 847 879 882 889-890 906 917 991 997 1009 1023 1029-1033 1035-1036 1038 1041-1042 1049-1050 1052 1057-1058 1060-1062 1065 1072 1075 1090 1097 1159 1162-1163 1166 1196 1199 1201 1211 1224 1232 1545 1554 1564 1577 1580 1582 1588 1676 1704 2086 2152 2163 2178 2183 2211 2274 2291 2296 2325 2328 2335 2350 2356 2368 2375 2418 2426 2446 2456-2457 2466 2468 2483 2489 2494 2496 2525 2535 2538 2577 2583 2589 2609 2618 2678 2686 2715 2728 2731 2736 2739 2760 2778-2779 2788-2789 2792 2804 2806 2811 2813 2827-2828 2830 2838 2850 2866 2874 2914-2915 2924 2949 2963 2974 2978 2980-2981 2988 2992 2995 3014 3021 3032-3033 3045 3051 3053 3059 3062 3066 3068-3069 3768 13432 13512 13517 13579 13591 13650 13654 13667 13669 13672 13681 13686 13714 13737 13742 13758-13759 13761 13770 13772 13774 13776 13782 13787 13795-13797 13801-13802 13805 13808-13810 13816 13818 13823 13878 13911 13917 13931 13938 13943 13950 13972 14005 14018 14032 14041 14043 14046-14047 14054-14055 14057-14058 14063-14065 14067 14072 14074 14076-14077 14085 14091 14093-14094 14100 14105 14108 14111-14114 14118 14121-14123 14126 14134-14135 14142-14145 14149 14152 14158 14162 14169 14171 14178 14183 14188 14191 14194 14198 14204 14208 14210-14213 14221 14223 14226 14229-14230 14232-14234 14237 14240 14242-14245 14247 14253-14254 14257-14258 14265-14268 14271 14273 14280-14282 14291 14293-14294 14298 14305-14306 14308 14310 14312 14321 14327 14329 15383 15389 15424 15427-15428 15430-15431 15433 15435-15437 15446-15450 15452-15454 15460-15461 15472 15475-15476 15479 15481 15616-15617 15619-15621 15623 15625-15627 15630-15633 15636 15641-15642 15646 15659 15667 15684 15692 15749 19751 20477 20593 20737 20739 20752-20753 20756 20765 20780 20799 20803 20826 20841-20842 20846 20867 20873 20876 20881 20883 20886 20894 20913 20924 20928 20932 20941 20962 20973 20984 20987 21249 21252 21267 21274 21276 21280 21289 21297 21299-21301 21307-21308 21318-21319 21323-21324 21346-21347 21350 21354-21355 21361 21368 21370 21372 21374 21391 21398 21429 21456 21463-21464 21466 21468 21471-21472 21485-21486 21490-21491 21493 21496 21500-21501 22144 22176-22177 22184-22185 22200 22811 22823 22844-22845 22847 22857 22864 22869 22872 22876 22882 22890 22892-22893 22902 22904 22906-22908 22910-22911 22920 22935 22941 22963 23006 23011 23017 23022 23024 23026 23035 23037 23261 23285-23286 23288 23313 23315 23321 23325 23328-23329 23339 23344-23345 23355-23356 23358 23362 23368-23370 23372 23375 23383 23385-23389 23392-23393 23395-23396 23399 23404-23405 23407-23408 23413 23415-23416 23418-23419 23443-23444 23448 23450 23453-23454 23462 23468 23472 23489-23490 23496-23497 23499 23508 23510-23511 23514 23516 23518-23519 23529-23531 23541-23542 23558 23593 23603 23611 23614 23680 23689 23695-23696 23698 23702 23704 23708 23710 23714 23721-23724 23726 23734 23741 23784 24067-24068 24070 24074 24076 24079 24094-24095 24098-24100 24103-24106 24109-24110 24118 24123-24124 24126 24192 24194-24196 24204 24206-24207 24212 24215-24218 24220 24223-24226 24228-24230 24241-24242 24244 24246 24248 24251 24256 24258-24259 24266 24294 24297-24298 24367 27539 37695 37736-37738 37780 37785 37790 37803 37811 37813 37817-37818 37820-37822 37824 37826-37827 37830 37833 37836 37848 37850-37851 37857-37861 37864 37867 37872 37880 37882 39031 39039 39186 39188 39198 39203 39215 39220 39225 39230 39232 39236 39239 39242-39243 39264 39266 39268 39305 39328 39332 39346 39355 39362 39377 39394 39397 39526 39539 39543 39545 39628 39632-39633 39637 39642-39644 39669-39670 39689 39692-39693 39696 39700-39701 39712-39713 39715 39720 39730 39732-39733 39809 39811 39820 39832 39834 39844 39852 39854 39856 39858 39865 39908 39916https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/647/A137?format=asciidefaultJ/A+A/647/A137/tableb1Final selection of tidal tail members in Gaia DR2 data based on model M1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[0/1108] Sequential numbermeta.recordintGaiaDR2Gaia DR2 source IDmeta.id;meta.mainRA_ICRSGaia DR2 Right Ascension (ICRS) at Ep=2015.5degpos.eq.ra;meta.mainDE_ICRSGaia DR2 Declination (ICRS) at Ep=2015.5degpos.eq.dec;meta.mainpmRAGaia DR2 Proper motion in Right Ascension, pmRA*cosDEmas/yrpos.pm;pos.eq.radoublepmDEGaia DR2 Proper motion in Declinationmas/yrpos.pm;pos.eq.decdoubleSimbadSimbad 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.decindexedJ/A+A/647/A137/tableb2Final selection of tidal tail members in Gaia eDR3 data based of model M5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[0/861] Sequential numbermeta.recordintGaiaEDR3Gaia EDR3 source IDmeta.id;meta.mainRA_ICRSGaia EDR3 Right Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainDE_ICRSGaia EDR3 Declination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainpmRAGaia EDR3 Proper motion in Right Ascension, pmRA*cosDEmas/yrpos.pm;pos.eq.radoublepmDEGaia EDR3 Proper motion in Declinationmas/yrpos.pm;pos.eq.decdoubleSimbadSimbad 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.decindexed