Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12666/671
Title: Gaia Early Data Release 3 Acceleration of the Solar System from Gaia astrometry
Authors: Klioner, S. A.
Mignard, F.
Lindegren, L.
Bastian, U.
McMillan, P. J.
Hernández, J.
Hobbs, D.
Ramos Lerate, M.
Biermann, M.
Bombrun, A.
De Torres, A.
Hestroffer, D.
Frémat, Y.
Orrù, G.
Carlucci, T.
Molinaro, R.
Van Leeuwen, F.
Barstow, M. A.
Del Peloso, E. F.
Mann, R. G.
Abreu Aramburu, A.
Zurbach, C.
Seabroke, G. M.
Walton, N. A.
Halbwachs, J. L.
Masip, A.
Lobel, A.
Becciani, U.
Damerdji, Y.
Pineau, F. X.
Spagna, A.
Crifo, F.
Sánchez Giménez, V.
Samaras, N.
Zucker, S.
De Luise, F.
Aerts, C.
Juaristi Campillo, J.
Diener, C.
Hauser, M.
García Gutierrez, A.
Martin Polo, L.
Le Campion, J. F.
González Santamaria, I.
Cheek, N.
Marinoni, S.
Hladczuk, N.
García Lario, P.
Fernández Hernández, J.
Sarro, L. M.
Karbevska, L.
Roux, W.
Mor, R.
Siddiqui, H. I.
Janßen, Katja
Lanzafame, A. C.
Jordan, S.
Musella, I.
Lindstrom, H. E. P.
Mora, A.
Molina, D.
Van Reeven, W.
Roegiers, T.
Riello, M.
Fernique, P.
Fragkoudi, F.
Cellino, A.
De Bruijne, J. H. J.
Delchambre, L.
David, M.
Burlacu, A.
Piersimoni, A. M.
Tonello, N.
Hatzidimitriou, D.
Jonker, P. G.
Franke, F.
Royer, F.
Raiteri, C. M.
Guy, L. P.
Galluccio, L.
Pulone, L.
Robichon, N.
Pagano, I.
Dolding, C.
Audard, M.
Guerrier, A.
Vaillant, M.
Andrae, R.
González Vidal, J. J.
Hidalgo, S. L.
Moitinho, A.
Marrese, P. M.
Pauwels, T.
Antoja, T.
Molnár, L.
Balbinot, E.
Balaguer Núñez, L.
De March, R.
Abbas, U.
Castañeda, J.
Vallenari, A.
Accart, S.
Souami, D.
Holland, G.
Schultheis, M.
Ulla, A.
Fouron, C.
Managau, S.
Roelens, M.
Del Pozo, E.
Baker, S. G.
Robin, A. C.
Butkevich, A. G.
Sahlmann, J.
Rixon, G.
Garabato, D.
Boch, T.
Taylor, M. B.
Portell, J.
Jordi, C.
Fouesneau, M.
Heiter, U.
Lister, T. A.
Delgado, H. E.
Plum, G.
Marshall, D. J.
Palicio, P. A.
Morel, T.
Sadowski, G.
Racero, E.
Bianchi, L.
Rowell, N.
Peñalosa Ester, X.
Bressan, A.
Breedt, E.
David, P.
Poretti, E.
Baines, D.
Segovia, J. C.
Pailler, F.
Castellani, M.
Carrasco, J. M.
Smart, R. L.
Reylé, C.
Chiavassa, A.
Sarasso, M.
Babusiaux, C.
Dapergolas, A.
Crowley, C.
Millar, N. R.
Bertone, S.
Marchal, O.
Bouquillon, S.
Liao, S.
Granvik, M.
Tauran, G.
Carry, B.
Cancelliere, R.
Plachy, E.
Montegriffo, P.
Vanel, O.
Palaversa, L.
Brown, A. G. A.
Turon, C.
Yoldas, A.
Spoto, F.
Panem, C.
Esquej, P.
Aguado, J. J.
Davidson, M.
Osinde, J.
Pawlak, M.
Chemin, L.
Charlot, P.
Cowell, S.
Enke, H.
Sciacca, E.
Fedorets, G.
Faigler, S.
Livanou, E.
Hilger, T.
Lorca, A.
Delgado, A.
Thévenin, F.
Penttilä, A.
Jean Antonie Piccolo, A.
De Ridder, J.
Pourbaix, D.
Robin, C.
Zhao, H.
Fabrizio, M.
Dafonte, C.
Hutton, A.
De Angeli, F.
Wyrzykowski, L.
Morbidelli, R.
Giacobbe, P.
Brugaletta, E.
Barache, C.
Pancino, E.
Cánovas, H.
Ripepi, V.
Marconi, M.
Thuillot, W.
Rybicki, K. A.
Steele, I. A.
Semeux, D.
Bakker, J.
Unger, N.
Gavras, P.
Szegedi Elek, E.
González Santamaria, I.
Gómez, A.
Licata, E.
Katz, D.
Fabre, C.
Mowlavi, N.
Anglada Varela, E.
Jansen, F.
Jasniewicz, G.
Voutsinas, S.
Kochoska, A.
Guiraud, J.
Gerlach, E.
Lecoeur Taibi, I.
Leccia, S.
Sanna, N.
Garofalo, A.
Prusti, T.
Girona, S.
Pagani, C.
Blomme, R.
Bernet, M.
Haywood, M.
Teixeira, R.
Segol, M.
Dell´Oro, A.
Drimmel, R.
Löffler, W.
Clementini, G.
Teyssier, D.
Recio Blanco, A.
Massari, D.
Delisle, J. B.
Bossini, D.
Souchay, J.
Szabados, L.
Khanna, S.
Kervella, P.
Lebreton, Y.
Masana, E.
Michalik, D.
Messina, S.
Riva, A.
Jevardat de Fombelle, G.
Castro Sampol, P.
Marchant, J. M.
Steidelmüller, H.
Taris, F.
Altavilla, G.
Richards, P. J.
Yvard, P.
Harrison, D. L.
Mazeh, T.
Leclerc, N.
Muinonen, K.
Van Leewen, M.
Haigron, R.
Ségransan, D.
Muraveva, T.
Fienga, A.
Cornez, T.
Helmi, A.
Weiler, M.
Romero Gómez, M.
Busso, G.
Zwitter, T.
Altmann, M.
Nienartowicz, K.
Utrilla, E.
Muñoz, D.
Benson, K.
Ordénovic, C.
Noval, L.
Regibo, S.
Smith, M.
Mastrobuono Battisti, A.
Álvarez Cid Fuentes, J.
Eappachen, D.
Osborne, Paul
García Reinaldos, M.
Prsa, A.
Ajaj, M.
Holl, B.
Re Fiorentin, P.
Rambaux, N.
Guerra, R.
Mulone, A. F.
Manteiga, M.
Murphy, C. P.
Baudesson-Stella, A.
García Torres, M.
Sartoretti, P.
Burgess, P. W.
Messineo, M.
Bramante, L.
Siopis, C.
Castro Ginard, A.
Blanco Cuaresma, S.
Barbato, D.
Salgado, J
Marcos Santos, M. M. S.
Gilmore, G.
Gracia Abril, G.
Bellas Velidis, I.
Poujoulet, E.
Soubiran, C.
Rainer, M.
Álvarez, M. A.
Bailer Jones, C. A. L.
Wevers, T.
Carnerero, M. I.
Julbe, F.
Rohrbasser, L.
Krone Martins, A.
Berthier, J.
Diakite, S.
Crosta, M.
Hambly, N. C.
Caffau, E.
Ramos, P.
Comoretto, G.
De Teodoro, P.
Busonero, D.
Nicolas, C.
Siltala, L.
Mints, A.
Le Fustec, Y.
Panahi, A.
González Núñez, J.
Bellazzini, M.
Hodgkin, S. T.
Barros, M.
Anderson, R. I.
De Souza, R.
Siebert, A.
Bassilana, J. L.
Solitro, F.
Solano, E.
Lattanzi, M. G.
Salguero, E.
Di Stefano, E.
Martín Fleitas, J. M.
Cooper, W. J.
Brouillet, N.
Torra, J.
Di Matteo, P.
Carballo, R.
Vicente, D.
Vecchiato, A.
Cropper, M.
Chaoul, L.
Slezak, E.
Gai, M.
Morris, D.
Geyer, R.
Stephenson, C. A.
Lammers, U.
Giuffrida, G.
De Laverny, P.
Eyer, L.
Figueras, F.
Ducourant, C.
Arenou, F.
Randich, S.
Balog, Z.
Bartolomé, S.
Torra, F.
Rimoldini, L.
Van Dillen, E.
Rybizki, J.
Gosset, E.
Huckle, H. E.
Poggio, E.
Zorec, J.
Casamiquela, L.
Bauchet, N.
Marocco, F.
Lebzelter, T.
Buzzi, R.
Viala, Y.
Kordopatis, G.
Madrero Pardo, P.
Gutiérrez Sánchez, R.
Alves, J.
Riclet, F.
Santoveña, R.
Ragaini, S.
Süveges, M.
Bucciarelli, B.
Cantat Gaudin, T.
Evans, D. W.
Creevey, O. L.
Luri, X.
Panuzzo, P.
Fraile, E.
Tanga, P.
Sordo, R.
Sozzetti, A.
Fabricius, C.
Sagristà Sellés, A.
Keywords: Astrometry;Proper motions;Reference systems;Galaxy: kinematics and dynamics;Methods: data analysis
Issue Date: 28-Apr-2021
Publisher: EDP Sciences
DOI: 10.1051/0004-6361/202039734
Published version: https://www.aanda.org/articles/aa/full_html/2021/05/aa39734-20/aa39734-20.html
Citation: Astronomy and Astrophysics 649: A9(2921)
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 systembarycentre 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. Theeffect of the acceleration was 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 were tried and compared to get the most consistent result and a realistic estimate of its uncertainty. Additional tests with the Gaia astrometric solution were used to get a better idea of the possible systematic errors in the estimate. Results. Our best estimate of the acceleration based on Gaia EDR3 is (2.32 ± 0.16) × 10−10 m s−2 (or 7.33 ±0.51 km s−1 Myr−1) towards α = 269.1° ± 5.4°, δ = −31.6° ± 4.1°, corresponding to a proper motion amplitude of 5.05 ±0.35 μas 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 μas yr−1.
URI: http://hdl.handle.net/20.500.12666/671
E-ISSN: 1432-0746
ISSN: 0004-6361
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