University of Leicester
Browse
1/1
3 files

Gaia Data Release 2: The kinematics of globular clusters and dwarf galaxies around the Milky Way

journal contribution
posted on 2020-12-01, 10:19 authored by A Helmi, F van Leeuwen, PJ McMillan, D Massari, T Antoja, AC Robin, L Lindegren, U Bastian, F Arenou, C Babusiaux, M Biermann, MA Breddels, D Hobbs, C Jordi, E Pancino, C Reyle, J Veljanoski, AGA Brown, A Vallenari, T Prusti, JHJ de Bruijne, CAL Bailer-Jones, DW Evans, L Eyer, F Jansen, SA Klioner, U Lammers, X Luri, F Mignard, C Panem, D Pourbaix, S Randich, P Sartoretti, HI Siddiqui, C Soubiran, NA Walton, M Cropper, R Drimmel, D Katz, MG Lattanzi, J Bakker, C Cacciari, J Castaneda, L Chaoul, N Cheek, F De Angeli, C Fabricius, R Guerra, B Holl, E Masana, R Messineo, N Mowlavi, K Nienartowicz, P Panuzzo, J Portell, M Riello, GM Seabroke, P Tanga, F Thevenin, G Gracia-Abril, G Comoretto, M Garcia-Reinaldos, D Teyssier, M Altmann, R Andrae, M Audard, I Bellas-Velidis, K Benson, J Berthier, R Blomme, P Burgess, G Busso, B Carry, A Cellino, G Clementini, M Clotet, O Creevey, M Davidson, J De Ridder, L Delchambre, A Dell'Oro, C Ducourant, J Fernandez-Hernandez, M Fouesneau, Y Fremat, L Galluccio, M Garcia-Torres, J Gonzalez-Nunez, JJ Gonzalez-Vidal, E Gosset, LP Guy, J-L Halbwachs, NC Hambly, DL Harrison, J Hernandez, D Hestroffer, ST Hodgkin, A Hutton, G Jasniewicz, A Jean-Antoine-Piccolo, S Jordan, AJ Korn, A Krone-Martins, AC Lanzafame, T Lebzelter, W Loeffler, M Manteiga, PM Marrese, JM Martin-Fleitas, A Moitinho, A Mora, K Muinonen, J Osinde, T Pauwels, J-M Petit, A Recio-Blanco, PJ Richards, L Rimoldini, LM Sarro, C Siopis, M Smith, A Sozzetti, M Sueveges, J Torra, W van Reeven, U Abbas, A Abreu Aramburu, S Accart, C Aerts, G Altavilla, MA Alvarez, R Alvarez, J Alves, RI Anderson, AH Andrei, E Anglada Varela, E Antiche, B Arcay, TL Astraatmadja, N Bach, SG Baker, L Balaguer-Nunez, P Balm, C Barache, C Barata, D Barbato, F Barblan, PS Barklem, D Barrado, M Barros, MA Barstow, S Bartholome Munoz, J-L Bassilana, U Becciani, M Bellazzini, A Berihuete, S Bertone, L Bianchi, O Bienayme, S Blanco-Cuaresma, T Boch, C Boeche, A Bombrun, R Borrachero, D Bossini, S Bouquillon, G Bourda, A Bragaglia, L Bramante, A Bressan, N Brouillet, T Bruesemeister, E Brugaletta, B Bucciarelli, A Burlacu, D Busonero, AG Butkevich, R Buzzi, E Caffau, R Cancelliere, G Cannizzaro, T Cantat-Gaudin, R Carballo, T Carlucci, JM Carrasco, L Casamiquela, M Castellani, A Castro-Ginard, P Charlot, L Chemin, A Chiavassa, G Cocozza, G Costigan, S Cowell, F Crifo, M Crosta, C Crowley, J Cuypers, C Dafonte, Y Damerdji, A Dapergolas, P David, M David, P de laverny, F De Luise, R De March, D de Martino, R de Souza, A de Torres, J Debosscher, E del Pozo, M Delbo, A Delgado, HE Delgado, P Di Matteo, S Diakite, C Diener, E Distefano, C Dolding, P Drazinos, J Duran, B Edvardsson, H Enke, K Eriksson, P Esquej, G Eynard Bontemps, C Fabre, M Fabrizio, S Faigler, AJ Falcao, M Farras Casas, L Federici, G Fedorets, P Fernique, F Figueras, F Filippi, K Findeisen, A Fonti, E Fraile, M Fraser, B Frezouls, M Gai, S Galleti, D Garabato, F Garcia-Sedano, A Garofalo, N Garralda, A Gavel, P Gavras, J Gerssen, R Geyer, P Giacobbe, G Gilmore, S Girona, G Giuffrida, F Glass, M Gomes, M Granvik, A Gueguen, A Guerrier, J Guiraud, R Gutierrez-Sanchez, R Haigron, D Hatzidimitriou, M Hauser, M Haywood, U Heiter, J Heu, T Hilger, W Hofmann, G Holland, HE Huckle, A Hypki, V Icardi, K Janssen, G Jevardat de Fombelle, PG Jonker, AL Juhasz, F Julbe, A Karampelas, A Kewley, J Klar, A Kochoska, R Kohley, K Kolenberg, M Kontizas, E Kontizas, SE Koposov, G Kordopatis, Z Kostrzewa-Rutkowska, P Koubsky, S Lambert, AF Lanza, Y Lasne, J-B Lavigne, Y Le Fustec, C Le Poncin-Lafitte, Y Lebreton, S Leccia, N Leclerc, I Lecoeur-Taibi, H Lenhardt, F Leroux, S Liao, E Licata, HEP Lindstrom, TA Lister, E Livanou, A Lobel, M Lopez, S Managau, RG Mann, G Mantelet, O Marchal, JM Marchant, M Marconi, S Marinoni, G Marschalko, DJ Marshall, M Martino, G Marton, N Mary, G Matijevic, T Mazeh, S Messina, D Michalik, NR Millar, D Molina, R Molinaro, L Molnar, P Montegriffo, R Mor, R Morbidelli, T Morel, D Morris, AF Mulone, T Muraveva, I Musella, G Nelemans, L Nicastro, L Noval, W O'Mullane, C Ordenovic, D Ordonez-Blanco, P Osborne, C Pagani, I Pagano, F Pailler, H Palacin, L Palaversa, A Panahi, M Pawlak, AM Piersimoni, F-X Pineau, E Plachy, G Plum, E Poggio, E Poujoulet, A Prsa, L Pulone, E Racero, S Ragaini, N Rambaux, M Ramos-Lerate, S Regibo, F Riclet, V Ripepi, A Riva, A Rivard, G Rixon, T Roegiers, M Roelens, M Romero-Gomez, N Rowell, F Royer, L Ruiz-Dern, G Sadowski, T Sagrista Selles, J Sahlmann, J Salgado, E Salguero, N Sanna, T Santana-Ros, M Sarasso, H Savietto, M Schultheis, E Sciacca, M Segol, JC Segovia, D Segransan, I-C Shih, L Siltala, AF Silva, RL Smart, KW Smith, E Solano, F Solitro, R Sordo, S Soria Nieto, J Souchay, A Spagna, F Spoto, U Stampa, IA Steele, H Steidelmueller, CA Stephenson, H Stoev, FF Suess, J Surdej, L Szabados, E Szegedi-Elek, D Tapiador, F Taris, G Tauran, MB Taylor, R Teixeira, D Terrett, P Teyssandier, W Thuillot, A Titarenko, F Torra Clotet, C Turon, A Ulla, E Utrilla, S Uzzi, M Vaillant, G Valentini, V Valette, A Van Elteren, E Van Hemelryck, M van Leeuwen, M Vaschetto, A Vecchiato, Y Viala, D Vicente, S Vogt, C von Essen, H Voss, V Votruba, S Voutsinas, G Walmsley, M Weiler, O Wertz, T Wevers, L Wyrzykowski, A Yoldas, M Zerjal, H Ziaeepour, J Zorec, S Zschocke, S Zucker, C Zurbach, T Zwitter
Aims. The goal of this paper is to demonstrate the outstanding quality of the second data release of the Gaia mission and its power for constraining many different aspects of the dynamics of the satellites of the Milky Way. We focus here on determining the proper motions of 75 Galactic globular clusters, nine dwarf spheroidal galaxies, one ultra-faint system, and the Large and Small Magellanic Clouds.

Methods. Using data extracted from the Gaia archive, we derived the proper motions and parallaxes for these systems, as well as their uncertainties. We demonstrate that the errors, statistical and systematic, are relatively well understood. We integrated the orbits of these objects in three different Galactic potentials, and characterised their properties. We present the derived proper motions, space velocities, and characteristic orbital parameters in various tables to facilitate their use by the astronomical community.

Results. Our limited and straightforward analyses have allowed us for example to (i) determine absolute and very precise proper motions for globular clusters; (ii) detect clear rotation signatures in the proper motions of at least five globular clusters; (iii) show that the satellites of the Milky Way are all on high-inclination orbits, but that they do not share a single plane of motion; (iv) derive a lower limit for the mass of the Milky Way of 9.1-2.6+6.2 × 1011 M⊙ based on the assumption that the Leo I dwarf spheroidal is bound; (v) derive a rotation curve for the Large Magellanic Cloud based solely on proper motions that is competitive with line-of-sight velocity curves, now using many orders of magnitude more sources; and (vi) unveil the dynamical effect of the bar on the motions of stars in the Large Magellanic Cloud.

Conclusions. All these results highlight the incredible power of the Gaia astrometric mission, and in particular of its second data release.

History

Citation

A&A, Volume 616, August 2018, Gaia Data Release 2

Author affiliation

Department of Physics and Astronomy

Version

  • VoR (Version of Record)

Published in

Astronomy & Astrophysics

Volume

642

Publisher

EDP SCIENCES S A

issn

0004-6361

eissn

1432-0746

Copyright date

2018

Available date

2018-08-10

Notes

2 corrigendum published, DOI in references, files attched.

Language

English

Usage metrics

    University of Leicester Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC