Titolo: | Gaia Early Data Release 3: Acceleration of the solar system from Gaia astrometry |
Autori: | Gaia Collaboration Klioner, S. A. Mignard, F. Lindegren, L. Bastian, U. McMillan, P. J. Hernández, J. Hobbs, D. Ramos-Lerate, M. Biermann, M. Bombrun, A. Cantat-Gaudin, T. Carballo, R. Carlucci, T. CARNERERO MARTIN, Maria Isabel Carrasco, J. M. Casamiquela, L. CASTELLANI, Marco Castro-Ginard, A. Castro Sampol, P. VALLENARI, Antonella Hodgkin, S. T. Chaoul, L. Charlot, P. Chemin, L. Chiavassa, A. COMORETTO, Giovanni Cooper, W. J. Cornez, T. Cowell, S. Crifo, F. CROSTA, Mariateresa Holl, B. Prusti, T. Crowley, C. Dafonte, C. Dapergolas, A. David, M. David, P. de Laverny, P. DE LUISE, Fiore De March, R. De Ridder, J. Janßen, K. de Souza, R. de Bruijne, J. H. J. de Teodoro, P. del Peloso, E. F. del Pozo, E. Delgado, A. Delgado, H. E. Delisle, J. -B. Di Matteo, P. Diakite, S. Jevardat de Fombelle, G. Diener, C. DISTEFANO, Elisa Maria Carmela Babusiaux, C. Dolding, C. Eappachen, D. Enke, H. Esquej, P. Fabre, C. FABRIZIO, Michele Faigler, S. Jordan, S. Fedorets, G. Fernique, P. Fienga, A. Creevey, O. L. Figueras, F. Fouron, C. Fragkoudi, F. Fraile, E. Franke, F. GAI, Mario Krone-Martins, A. Garabato, D. Garcia-Gutierrez, A. García-Torres, M. GAROFALO, Alessia Evans, D. W. Gavras, P. GIACOBBE, Paolo Gilmore, G. Girona, S. Giuffrida, G. Lanzafame, Alessandro Carmelo Gomez, A. Gonzalez-Santamaria, I. González-Vidal, J. J. Granvik, M. Gutiérrez-Sánchez, R. Eyer, L. Guy, L. P. Hauser, M. Haywood, M. Helmi, A. Löffler, W. Hidalgo, S. L. Hładczuk, N. Holland, G. Huckle, H. E. Jasniewicz, G. Jonker, P. G. Hutton, A. Juaristi Campillo, J. Julbe, F. Karbevska, L. Lorca, A. Kervella, P. Khanna, S. Kochoska, A. Kordopatis, G. Korn, A. J. Kostrzewa-Rutkowska, Z. Kruszyńska, K. Jansen, F. Lambert, S. LANZA, Antonino Francesco Manteiga, M. Lasne, Y. Le Campion, J. -F. Le Fustec, Y. Lebreton, Y. Lebzelter, T. LECCIA, Silvio Leclerc, N. Lecoeur-Taibi, I. Jordi, C. Liao, S. de Torres, A. LICATA, ENRICO Lindstrøm, H. E. P. Lister, T. A. Livanou, E. Lobel, A. Madrero Pardo, P. Managau, S. Mann, R. G. Marchant, J. M. Luri, X. Marchal, O. MARCONI, Marcella Marcos Santos, M. M. S. MARINONI, SILVIA Marocco, F. Marshall, D. J. Polo, L. Martin Martín-Fleitas, J. M. Masip, A. Massari, D. Mastrobuono-Battisti, A. MARRESE, Paola Maria Panem, C. Mazeh, T. MESSINA, Sergio Michalik, D. Millar, N. R. Mints, A. Molina, D. MOLINARO, Roberto Molnár, L. MONTEGRIFFO, Paolo Moitinho, A. Mor, R. Pourbaix, D. MORBIDELLI, Roberto Morel, T. Morris, D. Mulone, A. F. Munoz, D. Muraveva, Tatiana Murphy, C. P. MUSELLA, ILARIA Mora, A. Noval, L. Ordénovic, C. RANDICH, Maria Sofia Orrù, G. Osinde, J. Pagani, C. PAGANO, Isabella Palaversa, L. Palicio, P. A. Panahi, A. Muinonen, K. Pawlak, M. Pe\-nalosa Esteller, X. Penttilä, A. Sartoretti, P. PIERSIMONI, Anna Marina Pineau, F. -X. Plachy, E. Plum, G. Poggio, Eloisa PORETTI, Ennio Osborne, P. Poujoulet, E. Prša, A. PULONE, Luigi Racero, E. Soubiran, C. Ragaini, S. RAINER, Monica RAITERI, Claudia Maria Rambaux, N. Ramos, P. PANCINO, ELENA RE FIORENTIN, Paola Regibo, S. Reylé, C. RIPEPI, Vincenzo RIVA, Alberto Walton, N. A. Rixon, G. Robichon, N. Robin, C. Roelens, M. Pauwels, T. Rohrbasser, L. Romero-Gómez, M. Rowell, N. Royer, F. Rybicki, K. A. Sadowski, G. Arenou, F. Sagristà Sellés, A. Sahlmann, J. Salgado, J. Recio-Blanco, A. Salguero, E. Samaras, N. Sanchez Gimenez, V. SANNA, Nicoletta Santoveña, R. SARASSO, Maria Margherita Schultheis, M. Bailer-Jones, C. A. L. SCIACCA, Eva Segol, M. Richards, P. J. Segovia, J. C. Ségransan, D. Semeux, D. Siddiqui, H. I. Siebert, A. Siltala, L. Slezak, E. SMART, Richard Laurence Cropper, M. Solano, E. Gerlach, E. Solitro, F. Souami, D. Souchay, J. SPAGNA, Alessandro Spoto, F. Steele, I. A. Süveges, M. Szabados, L. Szegedi-Elek, E. DRIMMEL, Ronald Riello, M. Taris, F. Tauran, G. Taylor, M. B. Teixeira, R. Thuillot, W. Tonello, N. Torra, F. Torray, J. Turon, C. Unger, N. Rimoldini, L. Katz, D. Vaillant, M. van Dillen, E. Vanel, O. VECCHIATO, Alberto Viala, Y. Vicente, D. Voutsinas, S. Weiler, M. Wevers, T. Robin, A. C. Wyrzykowski, Ł. LATTANZI, Mario Gilberto Yoldas, A. Yvard, P. Zhao, H. Zorec, J. Zucker, S. Zurbach, C. Zwitter, T. van Leeuwen, F. Roegiers, T. Bakker, J. Castañeda, J. De Angeli, F. Ducourant, C. Fabricius, C. Fouesneau, M. Frémat, Y. Guerra, R. Guerrier, A. Guiraud, J. Rybizki, J. Jean-Antoine Piccolo, A. Masana, E. Messineo, R. Mowlavi, N. Nicolas, C. Nienartowicz, K. Pailler, F. Panuzzo, P. Riclet, F. Roux, W. Sarro, L. M. Seabroke, G. M. SORDO, ROSANNA Tanga, P. Thévenin, F. Gracia-Abril, G. Portell, J. Teyssier, D. Altmann, M. Andrae, R. Bellas-Velidis, I. Siopis, C. Benson, K. Berthier, J. Blomme, R. Brugaletta, Elisa Burgess, P. W. Busso, G. Carry, B. CELLINO, Alberto Cheek, N. CLEMENTINI, Gisella Smith, M. Damerdji, Y. Davidson, M. Delchambre, L. DELL'ORO, Aldo Fernández-Hernández, J. Galluccio, L. García-Lario, P. Garcia-Reinaldos, M. González-Núñez, J. Gosset, E. SOZZETTI, Alessandro Haigron, R. Halbwachs, J. -L. Hambly, N. C. Harrison, D. L. Hatzidimitriou, D. Heiter, U. Hestroffer, D. Ulla, A. Geyer, R. Utrilla, E. van Leeuwen, M. van Reeven, W. ABBAS, Ummi Abreu Aramburu, A. Accart, S. Aerts, C. Aguado, J. J. Ajaj, M. ALTAVILLA, GIUSEPPE Hilger, T. Álvarez, M. A. Álvarez Cid-Fuentes, J. Alves, J. Anderson, R. I. Anglada Varela, E. Antoja, T. Audard, M. Baines, D. Baker, S. G. Balaguer-Nú\-nez, L. Lammers, U. Balbinot, E. Balog, Z. Barache, C. Barbato, D. Barros, M. Barstow, M. A. Bartolomé, S. Bassilana, J. -L. Bauchet, N. Baudesson-Stella, A. Steidelmüller, H. BECCIANI, Ugo BELLAZZINI, Michele Bernet, M. BERTONE, Stefano Bianchi, L. Blanco-Cuaresma, S. Boch, T. Bossini, D. Bouquillon, S. Bramante, L. Stephenson, C. A. Breedt, E. Bressan, A. Brouillet, N. BUCCIARELLI, Beatrice Burlacu, A. BUSONERO, Deborah Butkevich, A. G. BUZZI, RAFFAELLA Caffau, E. Cancelliere, R. Brown, A. G. A. Cánovas, H. |
Data pubblicazione: | 2021 |
Rivista: | ASTRONOMY & ASTROPHYSICS |
Numero: | 649 |
Da pagina:: | A9 |
Abstract: | Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quality five-parameter astrometric solutions. Aims. The proper motions of QSO-like sources are used to reveal a systematic pattern due to the acceleration of the solar system barycentre with respect to the rest frame of the Universe. Apart from being an important scientific result by itself, the acceleration measured in this way is a good quality indicator of the Gaia astrometric solution. Methods. The effect of the acceleration is obtained as a part of the general expansion of the vector field of proper motions in Vector Spherical Harmonics (VSH). Various versions of the VSH fit and various subsets of the sources are tried and compared to get the most consistent result and a realistic estimate of its uncertainty. Additional tests with the Gaia astrometric solution are used to get a better idea on possible systematic errors in the estimate. Results. Our best estimate of the acceleration based on Gaia EDR3 is $(2.32 \pm 0.16) \times 10^{-10}$ m s${}^{-2}$ (or $7.33 \pm 0.51$ km s$^{-1}$ Myr${}^{-1}$) towards $\alpha = 269.1^\circ \pm 5.4^\circ$, $\delta = -31.6^\circ \pm 4.1^\circ$, corresponding to a proper motion amplitude of $5.05 \pm 0.35$ $\mu$as yr${}^{-1}$. This is in good agreement with the acceleration expected from current models of the Galactic gravitational potential. We expect that future Gaia data releases will provide estimates of the acceleration with uncertainties substantially below 0.1 $\mu$as yr${}^{-1}$. |
URI: | http://hdl.handle.net/20.500.12386/29942 |
URL: | https://www.aanda.org/component/article?access=doi&doi=10.1051/0004-6361/202039734 |
ISSN: | 0004-6361 |
DOI: | 10.1051/0004-6361/202039734 |
Bibcode ADS: | 2020arXiv201202036G |
Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista
|