Title: | Gaia Data Release 2. Kinematics of globular clusters and dwarf galaxies around the Milky Way |
Authors: | Gaia Collaboration Helmi, A. van Leeuwen, F. McMillan, P. J. MASSARI, DAVIDE Antoja, T. Robin, A. C. Lindegren, L. Bastian, U. Arenou, F. Babusiaux, C. Cannizzaro, G. Cantat-Gaudin, T. Carballo, R. Carlucci, T. Carrasco, J. M. Casamiquela, L. CASTELLANI, Marco Castro-Ginard, A. Charlot, P. VALLENARI, Antonella Jean-Antoine-Piccolo, A. Chemin, L. Chiavassa, A. Cocozza, G. Costigan, G. Cowell, S. Crifo, F. CROSTA, Mariateresa Crowley, C. Cuypers, J. Dafonte, C. Jordan, S. Prusti, T. Damerdji, Y. Dapergolas, A. David, P. David, M. de Laverny, P. DE LUISE, Fiore De March, R. DE MARTINO, Domitilla de Souza, R. Korn, A. J. de Torres, A. de Bruijne, J. H. J. Debosscher, J. del Pozo, E. Delbo, M. Delgado, A. Delgado, H. E. Di Matteo, P. Diakite, S. Diener, C. Krone-Martins, A. DISTEFANO, Elisa Maria Carmela Dolding, C. Bailer-Jones, C. A. L. Drazinos, P. Durán, J. Edvardsson, B. Enke, H. Eriksson, K. Esquej, P. Eynard Bontemps, G. Lanzafame, Alessandro Carmelo Fabre, C. FABRIZIO, Michele Faigler, S. Evans, D. W. Falcão, A. J. Farràs Casas, M. Federici, L. Fedorets, G. Fernique, P. Figueras, F. Lebzelter, T. Filippi, F. Findeisen, K. Fonti, A. Fraile, E. Eyer, L. Fraser, M. Frézouls, B. GAI, Mario GALLETI, SILVIA Garabato, D. Löffler, W. García-Sedano, F. GAROFALO, Alessia Garralda, N. Gavel, A. Gavras, P. Jansen, F. Gerssen, J. Geyer, R. GIACOBBE, Paolo Gilmore, G. Manteiga, M. Girona, S. Giuffrida, G. Glass, F. Gomes, M. Granvik, M. Gueguen, A. Klioner, S. A. Guerrier, A. Guiraud, J. Gutiérrez-Sánchez, R. MARRESE, Paola Maria Hofmann, W. Holland, G. Huckle, H. E. Hypki, A. Icardi, V. Janßen, K. Jevardat de Fombelle, G. Lammers, U. Jonker, P. G. Juhász, Á. L. Martín-Fleitas, J. M. Julbe, F. Karampelas, A. Kewley, A. Klar, J. Kochoska, A. Kohley, R. Kolenberg, K. Kontizas, M. Luri, X. Kontizas, E. Biermann, M. Koposov, S. E. Kordopatis, G. Kostrzewa-Rutkowska, Z. Koubsky, P. Lambert, S. LANZA, Antonino Francesco Lasne, Y. Lavigne, J. -B. Le Fustec, Y. Mignard, F. Moitinho, A. Le Poncin-Lafitte, C. Lebreton, Y. LECCIA, Silvio Leclerc, N. Lecoeur-Taibi, I. Lenhardt, H. Leroux, F. Liao, S. LICATA, ENRICO Lindstrøm, H. E. P. Mora, A. Panem, C. Lister, T. A. Livanou, E. Lobel, A. López, M. Managau, S. Mann, R. G. Mantelet, G. Marchal, O. Marchant, J. M. Muinonen, K. MARCONI, Marcella Pourbaix, D. MARINONI, SILVIA Marschalkó, G. Marshall, D. J. Martino, M. Marton, G. Mary, N. Matijevič, G. Mazeh, T. Osinde, J. MESSINA, Sergio Michalik, D. RANDICH, Maria Sofia Millar, N. R. Molina, D. MOLINARO, Roberto Molnár, L. MONTEGRIFFO, Paolo Mor, R. MORBIDELLI, Roberto Pauwels, T. Morel, T. Morris, D. Mulone, A. F. Sartoretti, P. Muraveva, Tatiana MUSELLA, ILARIA Nelemans, G. NICASTRO, LUCIANO Noval, L. O'Mullane, W. Petit, J. -M. Ordénovic, C. Ordóñez-Blanco, D. Osborne, P. Pagani, C. Siddiqui, H. I. PAGANO, Isabella Pailler, F. Palacin, H. Palaversa, L. Panahi, A. Recio-Blanco, A. Pawlak, M. PIERSIMONI, Anna Marina Pineau, F. -X. Plachy, E. Plum, G. Soubiran, C. Poggio, E. Poujoulet, E. Prša, A. PULONE, Luigi Richards, P. J. Racero, E. Ragaini, S. Rambaux, N. Ramos-Lerate, M. Regibo, S. Riclet, F. Walton, N. A. RIPEPI, Vincenzo RIVA, Alberto Rivard, A. Rimoldini, L. Rixon, G. Roegiers, T. Roelens, M. Romero-Gómez, M. Rowell, N. Royer, F. Ruiz-Dern, L. Cropper, M. Sadowski, G. Sagristà Sellés, T. Sarro, L. M. Sahlmann, J. Salgado, J. Salguero, E. SANNA, Nicoletta Santana-Ros, T. SARASSO, Maria Margherita Savietto, H. Schultheis, M. DRIMMEL, Ronald SCIACCA, Eva Breddels, M. A. Segol, M. Segovia, J. C. Ségransan, D. Shih, I. -C. Siltala, L. Silva, A. F. SMART, Richard Laurence Smith, K. W. Solano, E. Katz, D. Siopis, C. Solitro, F. SORDO, ROSANNA Soria Nieto, S. Souchay, J. SPAGNA, Alessandro Spoto, F. Stampa, U. Steele, I. A. Steidelmüller, H. Stephenson, C. A. Smith, M. GAI, Mario Stoev, H. Suess, F. F. Surdej, J. Szabados, L. Szegedi-Elek, E. Tapiador, D. Taris, F. Tauran, G. Taylor, M. B. SOZZETTI, Alessandro Teixeira, R. Bakker, J. Terrett, D. Teyssandier, P. Thuillot, W. Titarenko, A. Torra Clotet, F. Turon, C. Ulla, A. Utrilla, E. Süveges, M. Uzzi, S. Vaillant, M. Cacciari, C. Valentini, G. Valette, V. van Elteren, A. Van Hemelryck, E. van Leeuwen, M. Vaschetto, M. VECCHIATO, Alberto Torra, J. Viala, Y. Vicente, D. Vogt, S. Castañeda, J. von Essen, C. Voss, H. Votruba, V. Voutsinas, S. Walmsley, G. Weiler, M. van Reeven, W. Wertz, O. Wevems, T. Wyrzykowski, Ł. Yoldas, A. Chaoul, L. Žerjal, M. Ziaeepour, H. Zorec, J. Zschocke, S. Zucker, S. ABBAS, Ummi Zurbach, C. Zwitter, T. Cheek, N. De Angeli, F. Fabricius, C. Guerra, R. Holl, B. Masana, E. Messineo, R. Mowlavi, N. Abreu Aramburu, A. Nienartowicz, K. Panuzzo, P. Portell, J. Riello, M. Seabroke, G. M. Tanga, P. Thévenin, F. Gracia-Abril, G. COMORETTO, Giovanni Garcia-Reinaldos, M. Accart, S. Teyssier, D. Altmann, M. Andrae, R. Audard, M. Bellas-Velidis, I. Benson, K. Berthier, J. Blomme, R. Burgess, P. Busso, G. Aerts, C. Carry, B. CELLINO, Alberto CLEMENTINI, Gisella Clotet, M. Creevey, O. Davidson, M. De Ridder, J. Delchambre, L. DELL'ORO, Aldo Ducourant, C. Hobbs, D. Fernández-Hernández, J. Fouesneau, M. Frémat, Y. Galluccio, L. García-Torres, M. González-Núñez, J. González-Vidal, J. J. Gosset, E. Guy, L. P. Halbwachs, J. -L. ALTAVILLA, GIUSEPPE Hambly, N. C. Harrison, D. L. Hernández, J. Hestroffer, D. Hodgkin, S. T. Hutton, A. Jasniewicz, G. Álvarez, M. A. Alvarez, R. Alves, J. Anderson, R. I. Andrei, A. H. Anglada Varela, E. Antiche, E. Arcay, B. Astraatmadja, T. L. Jordi, C. Bach, N. Baker, S. G. Balaguer-Núñez, L. Balm, P. Barache, C. Barata, C. Barbato, D. Barblan, F. Barklem, P. S. Barrado, D. PANCINO, ELENA Barros, M. Barstow, M. A. Bartholomé Muñoz, S. Bassilana, J. -L. BECCIANI, Ugo BELLAZZINI, Michele Berihuete, A. Bertone, S. Bianchi, L. Bienaymé, O. Reylé, C. Blanco-Cuaresma, S. Boch, T. BOECHE, CORRADO Bombrun, A. Borrachero, R. Bossini, D. Bouquillon, S. Bourda, G. BRAGAGLIA, Angela Bramante, L. Veljanoski, J. Bressan, A. Brouillet, N. Brüsemeister, T. Brugaletta, Elisa BUCCIARELLI, Beatrice Burlacu, A. BUSONERO, Deborah Butkevich, A. G. BUZZI, RAFFAELLA Caffau, E. Brown, A. G. A. Cancelliere, R. |
Issue Date: | 2018 |
Journal: | ASTRONOMY & ASTROPHYSICS |
Number: | 616 |
First Page: | A12 |
Abstract: | Note to the Readers: Following the publication of the <a href="https://www.aanda.org/articles/aa/full_html/2020/05/aa32698e-18/aa32698e-18.html">corrigendum</a>, the article was corrected on 15 May 2020. <P />Context. <BR /> 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. <BR /> 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. <BR /> 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<SUB>-2.6</SUB><SUP>+6.2</SUP> × 10<SUP>11</SUP> M<SUB>☉</SUB> 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. <BR /> Conclusions: All these results highlight the incredible power of the Gaia astrometric mission, and in particular of its second data release. Full Table D.3 is only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://cdsarc.u-strasbg.fr">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/616/A12">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/616/A12 |
URI: | http://hdl.handle.net/20.500.12386/29255 |
URL: | http://arxiv.org/abs/1804.09381v2 https://www.aanda.org/articles/aa/full_html/2018/08/aa32698-18/aa32698-18.html |
ISSN: | 0004-6361 |
DOI: | 10.1051/0004-6361/201832698 |
Bibcode ADS: | 2018A&A...616A..12G |
Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista
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