J/A+A/657/A54ivo://CDS.VizieR/J/A+A/657/A54doi:10.26093/cds/vizier.36570054CDSBattaglia G.Taibi S.Thomas G.F.Fritz T.K.2022-10-12T08:46:07Z2022-01-07T08:06:48ZCDS support team

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

cds-question@unistra.frgalaxiesproper-motionsvisible-astronomyWe perform a comprehensive determination of the systemic proper motions of 74 dwarf galaxies and dwarf galaxy candidates in the Local Group based on Gaia early data release 3. The outputs of the analysis for each galaxy, including probabilities of membership, will be made publicly available. The analysis is augmented by a determination of the orbital properties of galaxies within 500kpc. We adopt a flexible Bayesian methodology presented in the literature, which takes into account the location of the stars on the sky, on the colour-magnitude diagram, and on the proper motion plane. We applied some modifications, in particular to the way the colour-magnitude diagram and spectroscopic information are factored in, for example, by including stars in several evolution phases. The bulk motions were integrated in three gravitational potentials: two where the Milky Way was treated in isolation and has a mass 0.9 & 1.6x10^12^M_{sun}_, and a time-varying potential, which includes the infall of a massive Large Magellanic Cloud (LMC). We were able to determine bulk proper motions for 73 systems, and we consider 66 to be reliable measurements. For the first time, systemic motions are presented for galaxies out to a distance of 1.4Mpc in the NGC 3109 association. The inclusion of the infall of a massive LMC significantly modifies the orbital trajectories of the objects, with respect to orbit integration in static Milky-Way-only potentials, and this leads to six galaxies likely being associated with the LMC, three possibly being associated with it, and one recently captured object. We discuss the results of the orbit integration in the context of the relation of the galaxies to the system of Milky Way satellites, implications for the too-big-to-fail problem, the impact on star formation histories, and tidal disruption.2022A&A...657A..54Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/657/A54CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/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/657/A54https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/657/A54http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/657/A54https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/657/A54https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/657/A54http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/657/A54GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/657/A54/pmem (Probabilities of membership)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/657/A54/pmem?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/657/A54/pmem?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/657/A54/pmem?GETtext/xml+votable180.050000true146.7755142619111-41.233521758949370.0055555555555555564/644 1573 1723 1772 2411-2412 2414 2443 5/1854 2186 2234-2235 2471 2523 2526 2545 2547-2548 2580 2922-2923 2965 3008-3009 6301 6336 6338 6715 6800-6801 6803-6804 6806 7429 8314 8406 8821 8885 8887 8893 8928 8930 8970-8971 8992-8994 9639 9652 9654-9655 9660 9662 9860 9988-9989 10000-10001 11655 6/618-619 705 2154-2155 2240-2241 2341 2352 4369 4372-4373 4410 4418-4419 4496 5287 5292-5293 5939 5945 6021 6023 6032 6034 7265 7405 7407 7410-7411 7414 7420 8738-8739 8742 8748 8750 8895 8952 8954-8955 10177 10179 10185 10187 10200 10202 10209 10212-10213 10261 10263 10328 10441 10443-10444 10446 10769-10771 11511 11517-11519 11655 11661 11666 11681-11684 11686-11687 11869 12040-12041 12044 16735 16757 17165 17167 17702 17708 17872 18034-18035 18040-18041 18538-18539 18923 18926 19239 19265 19268 19990 19996 20664 24652 24830-24831 25200-25201 25203 25376-25378 25484 25486 26487 26858-26859 26872 26874-26875 26980-26981 27000 27002 27208-27209 27211 27220 27222 27228 27230 27236-27237 27248-27249 27351 27547 27550 27616 27618 27624 27626 27648 28093 28095 28136 28138 28311 28317 28319 28376 28384-28385 28388-28389 29699 29713 29715 29721 29724-29725 30973 30975 31686 31692-31693 32827 32830 32913 32915-32916 32918 33355 33377 33685 33687 33709 33720 33744-33745 33995 33998 34366 34850 34856-34858 34944 35197-35199 35206 35212 35292-35293 35295 35539 35545 35547 35569 35716 35718 35724 35726 35744-35746 35874-35875 35878-35879 35980-35981 37613-37615 37624 37626 38506-38507 38510-38511 38522-38523 38549-38551 38553-38555 38573 38612 38614 38644-38646 38652 38654 38843 38846 38938-38939 38960-38961 38980-38981 38992 39067 39070-39071 39136 39138 39444-39446 39964-39965 40008-40009 40012 40016-40018 43671 43677 46021 46023 46089 46092 46100-46101 46123 46126-46127 46144-46145 46168-46169 46209 46212-46213 46279 46290 46664 47425 47428 48771 48774 48777 48780https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/657/A54?format=asciiOpticaldefaultJ/A+A/657/A54/pmemProbabilities of membershiprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGalaxyGalaxy namemeta.id.parentcharGaiaEDR3GaiaEDR3 identifiermeta.id;meta.mainRA_ICRS[0.0/360.0] Right ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainindexedDE_ICRS[-79.93/69.73] Declination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainindexedPmemb[0/1]? Membership probabilitystat.probabilitydoublenullable_RA.icrsRight ascension (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2016. (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexed