Gaia data release 2

• Verfasst von: Helmi, Amina [VerfasserIn]
• Verfasst von: Bastian, Ulrich [VerfasserIn]
• Verfasst von: Biermann, Michael [VerfasserIn]
• Verfasst von: Gracia-Abril, Gonzalo [VerfasserIn]
• Verfasst von: Altmann, Martin [VerfasserIn]
• Verfasst von: Jordan, Stefan [VerfasserIn]
• Verfasst von: Löffler, Wolfgang [VerfasserIn]
• Verfasst von: Brüsemeister, Thomas [VerfasserIn]
• Verfasst von: Lenhardt, Helmut [VerfasserIn]
• Verfasst von: Mantelet, Grégory [VerfasserIn]
• Verfasst von: Sagristà Sellés, Antoni [VerfasserIn]
• Verfasst von: Stampa, Ulrike [VerfasserIn]
• Titel: Gaia data release 2
• Titelzusatz: Kinematics of globular clusters and dwarf galaxies around the Milky Way
• Körperschaft: Gaia collaboration [VerfasserIn]
• Verf.angabe: Gaia collaboration, A. Helmi, F. van Leeuwen, P.J. McMillan, D. Massari, T. Antoja, A.C. Robin, L. Lindegren, U. Bastian, F. Arenou, C. Babusiaux, M. Biermann, M.A. Breddels, D. Hobbs, C. Jordi, E. Pancino, C. Reylé, J. Veljanoski, A.G.A. Brown, A. Vallenari, T. Prusti, J.H.J. de Bruijne, C.a.L. Bailer-Jones, D.W. Evans, L. Eyer, F. Jansen, S.A. Klioner, U. Lammers, X. Luri, F. Mignard, C. Panem, D. Pourbaix, S. Randich, P. Sartoretti, H.I. Siddiqui, C. Soubiran, N.A. Walton, M. Cropper, R. Drimmel, D. Katz, M.G. Lattanzi, J. Bakker, C. Cacciari, J. Castañeda, 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, G.M. Seabroke, P. Tanga, F. Thévenin, 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. Fernández-Hernández, M. Fouesneau, Y. Frémat, L. Galluccio, M. García-Torres, J. González-Núñez, J.J. González-Vidal, E. Gosset, L.P. Guy, J.-L. Halbwachs, N.C. Hambly, D.L. Harrison, J. Hernández, D. Hestroffer, S.T. Hodgkin, A. Hutton, G. Jasniewicz, A. Jean-Antoine-Piccolo, S. Jordan, A.J. Korn, A. Krone-Martins, A.C. Lanzafame, T. Lebzelter, W. Löffler, M. Manteiga, P.M. Marrese, J.M. Martín-Fleitas, A. Moitinho, A. Mora, K. Muinonen, J. Osinde, T. Pauwels, J.-M. Petit, A. Recio-Blanco, P.J. Richards, L. Rimoldini, L.M. Sarro, C. Siopis, M. Smith, A. Sozzetti, M. Süveges, J. Torra, W. van Reeven, U. Abbas, A. Abreu Aramburu, S. Accart, C. Aerts, G. Altavilla, M.A. Álvarez, R. Alvarez, J. Alves, R.I. Anderson, A.H. Andrei, E. Anglada Varela, E. Antiche, B. Arcay, T.L. Astraatmadja, N. Bach, S.G. Baker, L. Balaguer-Núñez, P. Balm, C. Barache, C. Barata, D. Barbato, F. Barblan, P.S. Barklem, D. Barrado, M. Barros, M.A. Barstow, S. Bartholomé Muñoz, J.-L. Bassilana, U. Becciani, M. Bellazzini, A. Berihuete, S. Bertone, L. Bianchi, O. Bienaymé, 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. Brüsemeister, E. Brugaletta, B. Bucciarelli, A. Burlacu, D. Busonero, A.G. Butkevich, R. Buzzi, E. Caffau, R. Cancelliere, G. Cannizzaro, T. Cantat-Gaudin, R. Carballo, T. Carlucci, J.M. 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, H.E. Delgado, P. Di Matteo, S. Diakite, C. Diener, E. Distefano, C. Dolding, P. Drazinos, J. Durán, B. Edvardsson, H. Enke, K. Eriksson, P. Esquej, G. Eynard Bontemps, C. Fabre, M. Fabrizio, S. Faigler, A.J. Falcão, M. Farràs Casas, L. Federici, G. Fedorets, P. Fernique, F. Figueras, F. Filippi, K. Findeisen, A. Fonti, E. Fraile, M. Fraser, B. Frézouls, M. Gai, S. Galleti, D. Garabato, F. García-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. Gutiérrez-Sánchez, W. Hofmann, G. Holland, H.E. Huckle, A. Hypki, V. Icardi, K. Janßen, G. Jevardat de Fombelle, P.G. Jonker, Á.L. Juhász, F. Julbe, A. Karampelas, A. Kewley, J. Klar, A. Kochoska, R. Kohley, K. Kolenberg, M. Kontizas, E. Kontizas, S.E. Koposov, G. Kordopatis, Z. Kostrzewa-Rutkowska, P. Koubsky, S. Lambert, A.F. 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, H.E.P. Lindstrøm, T.A. Lister, E. Livanou, A. Lobel, M. López, S. Managau, R.G. Mann, G. Mantelet, O. Marchal, J.M. Marchant, M. Marconi, S. Marinoni, G. Marschalkó, D.J. Marshall, M. Martino, G. Marton, N. Mary, G. Matijevič, T. Mazeh, S. Messina, D. Michalik, N.R. Millar, D. Molina, R. Molinaro, L. Molnár, P. Montegriffo, R. Mor, R. Morbidelli, T. Morel, D. Morris, A.F. Mulone, T. Muraveva, I. Musella, G. Nelemans, L. Nicastro, L. Noval, W. O’Mullane, C. Ordénovic, D. Ordóñez-Blanco, P. Osborne, C. Pagani, I. Pagano, F. Pailler, H. Palacin, L. Palaversa, A. Panahi, M. Pawlak, A.M. Piersimoni, F.-X. Pineau, E. Plachy, G. Plum, E. Poggio, E. Poujoulet, A. Prša, 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-Gómez, N. Rowell, F. Royer, L. Ruiz-Dern, G. Sadowski, T. Sagristà Sellés, J. Sahlmann, J. Salgado, E. Salguero, N. Sanna, T. Santana-Ros, M. Sarasso, H. Savietto, M. Schultheis, E. Sciacca, M. Segol, J.C. Segovia, D. Ségransan, I.-C. Shih, L. Siltala, A.F. Silva, R.L. Smart, K.W. Smith, E. Solano, F. Solitro, R. Sordo, S. Soria Nieto, J. Souchay, A. Spagna, F. Spoto, U. Stampa, I.A. Steele, H. Steidelmüller, C.A. Stephenson, H. Stoev, F.F. Suess, J. Surdej, L. Szabados, E. Szegedi-Elek, D. Tapiador, F. Taris, G. Tauran, M.B. 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. Wevems, Ł. Wyrzykowski, A. Yoldas, M. Žerjal, H. Ziaeepour, J. Zorec, S. Zschocke, S. Zucker, C. Zurbach, T. Zwitter
• E-Jahr: 2018
• Jahr: 10 August 2018
• Umfang: 47 S.
• Fussnoten: Gesehen am 22.02.2019
• Titel Quelle: Enthalten in: Astronomy and astrophysics
• Ort Quelle: Les Ulis : EDP Sciences, 1969
• Jahr Quelle: 2018
• Band/Heft Quelle: 616(2018) Artikel-Nummer A12, 47 Seiten
• ISSN Quelle: 1432-0746
• DOI: doi:10.1051/0004-6361/201832698
• Datenträger: Online-Ressource
• Sprache: eng
• Bibliogr. Hinweis: Errata: Helmi, Amina: Gaia data release 2
• K10plus-PPN: 1587912139

Abstract

<i>Context.<i/><i>Aims.<i/> The goal of this paper is to demonstrate the outstanding quality of the second data release of the <i>Gaia<i/> 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.<i>Methods.<i/> Using data extracted from the <i>Gaia<i/> 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.<i>Results.<i/> Our limited and straightforward analyses have allowed us for example to (<i>i<i/>) determine absolute and very precise proper motions for globular clusters; (<i>ii<i/>) detect clear rotation signatures in the proper motions of at least five globular clusters; (<i>iii<i/>) 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; (<i>iv<i/>) derive a lower limit for the mass of the Milky Way of based on the assumption that the Leo I dwarf spheroidal is bound; (<i>v<i/>) 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 (<i>vi<i/>) unveil the dynamical effect of the bar on the motions of stars in the Large Magellanic Cloud.<i>Conclusions.<i/> All these results highlight the incredible power of the <i>Gaia<i/> astrometric mission, and in particular of its second data release.