GaiaEarly Data Release 3

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 28 Apr 2021Embargo end date: 01 Jan 2020 Greece, Italy, Belgium, Netherlands, Netherlands, Italy, Spain, Italy, United States, Netherlands, Spain, Spain, Belgium, Belgium, Switzerland, France, Poland, Hungary, Italy, Denmark, Netherlands, Austria, Italy, Italy, Sweden, Spain Publisher:EDP SciencesJournal:Astronomy & Astrophysics, volume 649, page A9 (issn: 0004-6361, eissn: 1432-0746,

Copyright policy )Funded by:FCT | Recommender system to sup..., FWF | Long period variables and..., ANR | MOD4Gaia +19 projects

Authors: Gaia Collaboration; Klioner, S. A.; Mignard, F.; Lindegren, L.; Bastian, U.; McMillan, P. J.; Hernández, J.; +193 Authors

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.; de Torres, A.; Gerlach, E.; Geyer, R.; Hilger, T.; Lammers, U.; Steidelmüller, H.; Stephenson, C. A.; Brown, A. G. A.; Vallenari, A.; Prusti, T.; de Bruijne, J. H. J.; Babusiaux, C.; Creevey, O. L.; Evans, D. W.; Eyer, L.; Hutton, A.; Jansen, F.; Jordi, C.; Luri, X.; Panem, C.; Pourbaix, D.; Randich, S.; Sartoretti, P.; Soubiran, C.; Walton, N. A.; Arenou, F.; Bailer-Jones, C. A. L.; Cropper, M.; Drimmel, R.; Katz, D.; Lattanzi, M. G.; van Leeuwen, F.; Bakker, J.; Castañeda, J.; De Angeli, F.; Ducourant, C.; Fabricius, C.; Fouesneau, M.; Frémat, Y.; Guerra, R.; Guerrier, A.; Guiraud, J.; Piccolo, A. Jean-Antoine; Masana, E.; Messineo, R.; Mowlavi, N.; Nicolas, C.; Nienartowicz, K.; Pailler, F.; Panuzzo, P.; Riclet, F.; Roux, W.; Seabroke, G. M.; Sordo, R.; Tanga, P.; Thévenin, F.; Gracia-Abril, G.; Portell, J.; Teyssier, D.; Altmann, M.; Andrae, R.; Bellas-Velidis, I.; Benson, K.; Berthier, J.; Blomme, R.; Brugaletta, E.; Burgess, P. W.; Busso, G.; Carry, B.; Cellino, A.; Cheek, N.; Clementini, G.; Damerdji, Y.; Davidson, M.; Delchambre, L.; Dell'Oro, A.; Fernández-Hernández, J.; Galluccio, L.; García-Lario, P.; Garcia-Reinaldos, M.; González-Núñez, J.; Gosset, E.; Haigron, R.; Halbwachs, J. -L.; Hambly, N. C.; Harrison, D. L.; Hatzidimitriou, D.; Heiter, U.; Hestroffer, D.; Hodgkin, S. T.; Holl, B.; Janßen, K.; de Fombelle, G. Jevardat; Jordan, S.; Krone-Martins, A.; Lanzafame, A. C.; Löffler, W.; Lorca, A.; Manteiga, M.; Marchal, O.; Marrese, P. M.; Moitinho, A.; Mora, A.; Muinonen, K.; Osborne, P.; Pancino, E.; Pauwels, T.; Recio-Blanco, A.; Richards, P. J.; Riello, M.; Rimoldini, L.; Robin, A. C.; Roegiers, T.; Rybizki, J.; Sarro, L. M.; Siopis, C.; Smith, M.; Sozzetti, A.; Ulla, A.; Utrilla, E.; van Leeuwen, M.; van Reeven, W.; Abbas, U.; Aramburu, A. Abreu; Accart, S.; Aerts, C.; Aguado, J. J.; Ajaj, M.; Altavilla, G.; Álvarez, M. A.; Cid-Fuentes, J. Álvarez; Alves, J.; Anderson, R. I.; Varela, E. Anglada; Antoja, T.; Audard, M.; Baines, D.; Baker, S. G.; Balaguer-Nú\-nez, L.; Balbinot, E.; Balog, Z.; Barache, C.; Barbato, D.; Barros, M.; Barstow, M. A.; Bartolomé, S.; Bassilana, J. -L.; Bauchet, N.; Baudesson-Stella, A.; Becciani, U.; Bellazzini, M.; Bernet, M.; Bertone, S.; Bianchi, L.; Blanco-Cuaresma, S.; Boch, T.; Bossini, D.; Bouquillon, S.; Bramante, L.; Breedt, E.; Bressan, A.; Brouillet, N.; Bucciarelli, B.; Burlacu, A.; Busonero, D.; Butkevich, A. G.; Buzzi, R.; Caffau, E.; Cancelliere, R.; Cánovas, H.; Cantat-Gaudin, T.; Carballo, R.; Carlucci, T.; Carnerero, M. I; Carrasco, J. M.; Casamiquela, L.; Castellani, M.; Castro-Ginard, A.; Sampol, P. Castro; Chaoul, L.; Charlot, P.; Chemin, L.; Chiavassa, A.; Comoretto, G.; Cooper, W. J.; Cornez, T.; Cowell, S.; Crifo, F.; Crosta, M.;

doi: 10.1051/0004-6361/202039734 , 10.48550/arxiv.2012.02036

arXiv: 2012.02036

handle: 2183/28475 , 10902/23740 , 20.500.12666/671 , 10261/256697 , https://repository.ubn.ru.nl/handle/2066/233668 , 11370/17b466d8-fdc1-4467-9b57-e0fdf0801817 , 20.500.14243/515887 , 2268/296980 , 21.11116/0000-0008-F480-3 , 21.11116/0000-0008-F482-1 , 10067/1790780151162165141 , 11577/3537980 , 20.500.11769/523763 , 1887/3250903 , 20.500.11767/127141 , 2318/1804586

GaiaEarly Data Release 3

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Abstract

Context.GaiaEarly Data Release 3 (GaiaEDR3) 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 theGaiaastrometric 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 theGaiaastrometric solution were used to get a better idea of the possible systematic errors in the estimate.Results.Our best estimate of the acceleration based onGaiaEDR3 is (2.32 ± 0.16) × 10−10m s−2(or 7.33 ±0.51 km s−1Myr−1) towardsα= 269.1° ± 5.4°,δ= −31.6° ± 4.1°, corresponding to a proper motion amplitude of 5.05 ±0.35μas yr−1. This is in good agreement with the acceleration expected from current models of the Galactic gravitational potential. We expect that futureGaiadata releases will provide estimates of the acceleration with uncertainties substantially below 0.1μas yr−1.

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Greece, Italy, Belgium, Netherlands, Netherlands, Italy, Spain, Italy, United States, Netherlands, Spain, Spain, Belgium, Belgium, Switzerland, France, Poland, Hungary, Italy, Denmark, Netherlands, Austria, Italy, Italy, Sweden, Spain

Related Organizations

University of Turin
Italy
THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF CAMBRIDGE
United Kingdom
Institut de Physique de Rennes
France
TU Dresden
Germany
University of Bordeaux
France

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Keywords

Data Analysis, Aérospatiale, astronomie & astrophysique, 103003 Astronomie, Astronomy, kinematics and dynamics, Astrophysics, [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics / csillagászat, Astrophysics - Astrophysics of, 103038 Space exploration, Astronomi, astrofysik och kosmologi, Methods, QB Astronomy, Astronomy, Astrophysics and Cosmology, Reference Systems, 103004 Astrophysics, data analysis [Methods], [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Astrophysics of Galaxies, Physics, dynamics, Astrometry, 103004 Astrophysik, VIRGO CLUSTER, Kinematics and Dynamics, 520, Physical Sciences, MILKY-WAY, astrometry, Proper motions, astrometry â€“ proper motions â€“ reference systems â€“ Galaxy: kinematics and dynamics â€“ methods: data analysis, Galaxy: kinematics and dynamics, 5101 Astronomical sciences, PROPER MOTION, 330, Physique, chimie, mathématiques & sciences de la terre, Reference systems, astrometry; proper motions; reference systems; Galaxy: kinematics and dynamics; methods: data analysis; Astrophysics - Astrophysics of Galaxies, FOS: Physical sciences, Astronomy & Astrophysics, 103038 Weltraumforschung, MASS, Astrometry; Galaxy: kinematics and dynamics; Methods: data analysis; Proper motions; Reference systems, 5109 Space sciences, [SDU] Sciences of the Universe [physics], 103003 Astronomy, Proper Motions, Physical, chemical, mathematical & earth Sciences, 5107 Particle and high energy physics, proper motions, Methods: data analysis, 0201 Astronomical and Space Sciences, data analysis [methods], reference systems, KINEMATICS, Science & Technology, PERTURBATION, kinematics and dynamics [Galaxy], Galaxies, methods: data analysis, Astrophysics - Astrophysics of Galaxies, BAR, GALAXY, Galaxy, asztrofizika, [SDU]Sciences of the Universe [physics], QC Physics / fizika, Astrophysics of Galaxies (astro-ph.GA), DISTANCE, Space science, astronomy & astrophysics, LARGE-MAGELLANIC-CLOUD, Galaxy: kinematics and

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