Gaia Data Release 2. Summary of the contents and survey properties

Collaboration Gaia A. Brown A. Vallenari T. Prusti 1 J. De Bruijne C. Babusiaux 2 C. Bailer-Jones M. Biermann D. Evans L. Eyer 3 F. Jansen 4 C. Jordi S. Klioner U. Lammers L. Lindegren X. Luri 5 F. Mignard 6 C. Panem D. Pourbaix 7 S. Randich P. Sartoretti 2 H. Siddiqui 8 C. Soubiran 9 F. Van Leeuwen A. Walton F. Arenou 2 U. Bastian 10 M. Cropper R. Drimmel D. Katz 2 M. Lattanzi 11 J. Bakker 12 C. Cacciari 13 J. Castañeda L. Chaoul N. Cheek F. De Angeli 14 C. Fabricius 15 R. Guerra 16 B. Holl 17 E. Masana 18 R. Messineo N. Mowlavi K. Nienartowicz P. Panuzzo 19 J. Portell M. Riello M. Seabroke P. Tanga 6 F. Thevenin 6 G. Gracia-Abril G. Comoretto 20 M. Garcia-Reinaldos D. Teyssier M. Altmann 21 R. Andrae M. Audard 22 I. Bellas-Velidis K. Benson J. Berthier R. Blomme 23 P. Burgess 14 G. Busso 14 B. Carry 24 A. Cellino 25 G. Clementini 26 M. Clotet O. Creevey 27 M. David J. De Ridder 19 L. Delchambre A. Dell’oro C. Ducourant 9 J. Hernandez 28 M. Fouesneau Y. Frémat 2 L. Galluccio 29 M. García-Torres J. González-Núñez J. González-Vidal E. Gosset 30 P. Guy 31 J. Halbwachs C. Hambly D. Harrison D. Hestroffer 32 T. Hodgkin A. Hutton G. Jasniewicz 33 A. Jean-Antoine-Piccolo S. Jordan 34 J. Korn A. Krone-Martins 35 C. Lanza T. Lebzelter W. Löffler M. Manteiga M. Marrese J. Martín-Fleitas A. Moitinho 36 A. Mor K. Muinonen 37 J. Osinde E. Pancino 38 T. Pauwels 23 J. Petit 39 A. Recio-Blanco 6 J. Richards L. Rimoldini C. Robin M. Sarro C. Siopis M. Smith A. Sozzetti M. Süveges J. Torra W. Van Reeven U. Abbas 40 A. Abreu Aramburu S. Accart C. Aerts 41 G. Altavilla M. Álvarez R. Alvarez J. Alves R. Anderson H. Andrei E. Anglada Varela E. Antiche T. Antoja B. Arcay T. Astraatmadja 42 N. Bach 43 S. Baker L. Balaguer-Nunez 44 P. Balm C. Barache 21 C. Barata 45 D. Barbato F. Barblan S. Barklem D. Barrado 46 M. Barros M. Barstow 47 S. Bartholomé Muñoz J. Bassilana U. Becciani M. Bellazzini A. Berihuete S. Bertone L. Bianchi 48 O. Bienaymé 49 S. Blanco-Cuaresma 50 T. Boch C. Boeche A. Bombrun 51 R. Borrachero D. Bossini S. Bouquillon 21 G. Bourda 9 A. Bragaglia L. Bramante M. Breddels A. Bressan 52 N. Brouillet 53 T. Brüsemeister E. Brugaletta B. Bucciarelli A. Burlacu D. Busonero A. Butkevich R. Buzzi E. Caffau 2 R. Cancelliere G. Cannizzaro T. Cantat-Gaudin R. Carballo T. Carlucci 21 J. Carrasco 54 L. Casamiquela 9 M. Castellani 55 A. Castro-Ginard P. Charlot 9 L. Chemin A. Chiavassa 33 G. Cocozza G. Costigan S. Cowell 14 F. Crifo 2 M. Crosta C. Crowley 56 J. Cuypers† C. Dafonte Y. Damerdji 57 A. Dapergolas P. David P. De Laverny 6 F. De Luise 58 R. De March D. Martino 59 R. De Souza A. De Torres J. Debosscher 60 E. Del Pozo M. Delbò 6 A. Delgado 61 H. Delgado P. Di Matteo 2 S. Diakite 62 C. Diener E. Distefano C. Dolding P. Drazinos J. Duran 63 B. Edvardsson 64 H. Enke K. Eriksson 64 P. Esquej G. Eynard Bontemps C. Fabre 65 M. Fabrizio 66 S. Faigler J. Falcão M. Farràs Casas L. Federici 67 G. Fedorets P. Fernique 68 F. Figueras 69 F. Filippi 70 K. Findeisen A. Fonti E. Fraile M. Fraser 71 B. Frézouls M. Gai 25 S. Galleti D. Garabato F. García-Sedano A. Garofalo 72 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 73 A. Guerrier 74 J. Guiraud 75 R. Gutiérrez-Sánchez R. Haigron 2 D. Hatzidimitriou 76 M. Hauser M. Haywood 2 U. Heiter 64 A. Helmi 77 J. Heu T. Hilger D. Hobbs W. Hofmann G. Holland H. Huckle A. Hypki V. Icardi K. Janßen G. Jevardat de Fombelle G. Jonker L. Juhasz 78 F. Julbe A. Karampelas A. Kewley J. Klar A. Kochoska R. Kohley 79 K. Kolenberg M. Kontizas E. Kontizas S. Koposov G. Kordopatis 6 Z. Kostrzewa-Rutkowska P. Koubsky S. Lambert 80 A. Lanza Y. Lasne 81 J. Lavigne Y. Le Fustec C. Le Poncin-Lafitte 82 Y. Lebreton 2 S. Leccia N. Leclerc 83 I. Lecoeur-Taibi H. Lenhardt F. Leroux S. Liao 84 E. Licata H. Lindstrøm T. Lister E. Livanou A. Lobel 23 M. López S. Managau G. Mann 85 G. Mantelet 86 O. Marchal 87 J. Marchant 88 M. Marconi S. Marinoni G. Marschalkó D. J. Marshall 89 M. Martino G. Marton 90 N. Mary 91 D. Massari G. Matijevič T. Mazeh 92 J. Mcmillan S. Messina D. Michalik R. Millar 93 D. Molina R. Molinaro 94 L. Molnar 95 P. Montegriffo R. Mor R. Morbidelli T. Morel D. Morris 96 A. Mulone T. Muraveva I. Musella G. Nelemans L. Nicastro L. Noval W. O’mullane C. Ordenovic 6 D. Ordóñez-Blanco P. Osborne C. Pagani I. Pagano F. Pailler 97 H. Palacin L. Palaversa A. Panahi M. Pawlak M. Piersimoni F. Pineau 98 E. Plachy G. Plum E. Poggio E. Poujoulet A. Prša L. Pulone E. Racero S. Ragaini N. Rambaux 32 M. Ramos-Lerate S. Regibo C. Reyle 99 F. Riclet V. Ripepi 100 A. Riva 101 A. Rivard G. Rixon 14 T. Roegiers M. Roelens 102 M. Romero-Gomez 103 N. Rowell F. Royer 2 L. Ruiz-Dern 74 G. Sadowski 104 T. Sagristà Sellés J. Sahlmann J. Salgado 105 E. Salguero N. Sanna T. Santana-Ros 106 M. Sarasso H. Savietto M. Schultheis 99 E. Sciacca M. Segol 107 C. Segovia D. Segransan 50 C. Shih 108 L. Siltala A. Silva R. Smart 25 W. Smith E. Solano 109 F. Solitro R. Sordo S. Soria Nieto J. Souchay 21 A. Spagna F. Spoto 110 U. Stampa A. Steele 111 H. Steidelmüller C. Stephenson H. Stoev F. Suess J. Surdej 112 L. Szabados 113 E. Szegedi-Elek D. Tapiador F. Taris G. Tauran M. Taylor R. Teixeira 114 D. Terrett P. Teyssandier 21 W. Thuillot 32 A. Titarenko F. Torra Clotet C. Turon 2 A. Ulla E. Utrilla S. Uzzi M. Vaillant 115 G. Valentini 116 V. Valette 117 A. Van Elteren E. Van Hemelryck M. Van Leeuwen M. Vaschetto A. Vecchiato 118 J. Veljanoski Y. Viala 2 D. Vicente 119 S. Vogt 120 C. Von Essen H. Voss V. Votruba S. Voutsinas G. Walmsley M. Weiler 121 O. Wertz T. Wevers 122 Ł. Wyrzykowski A. Yoldas 14 M. Žerjal H. Ziaeepour 123 J. Zorec 124 S. Zschocke 125 S. Zucker 126 C. Zurbach 127 T. Zwitter
9 M2A 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
53 FORMATION STELLAIRE 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
117 Equipe EES
EBI - Ecologie et biologie des interactions
118 Astrometry
OATo - INAF - Osservatorio Astrofisico di Torino
Abstract : Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude 21. In addition epoch astrometry and photometry are provided for a modest sample of minor planets in the solar system. Aims: A summary of the contents of Gaia DR2 is presented, accompanied by a discussion on the differences with respect to Gaia DR1 and an overview of the main limitations which are still present in the survey. Recommendations are made on the responsible use of Gaia DR2 results. Methods: The raw data collected with the Gaia instruments during the first 22 months of the mission have been processed by the Gaia Data Processing and Analysis Consortium (DPAC) and turned into this second data release, which represents a major advance with respect to Gaia DR1 in terms of completeness, performance, and richness of the data products. Results: Gaia DR2 contains celestial positions and the apparent brightness in G for approximately 1.7 billion sources. For 1.3 billion of those sources, parallaxes and proper motions are in addition available. The sample of sources for which variability information is provided is expanded to 0.5 million stars. This data release contains four new elements: broad-band colour information in the form of the apparent brightness in the GBP (330-680 nm) and GRP (630-1050 nm) bands is available for 1.4 billion sources; median radial velocities for some 7 million sources are presented; for between 77 and 161 million sources estimates are provided of the stellar effective temperature, extinction, reddening, and radius and luminosity; and for a pre-selected list of 14 000 minor planets in the solar system epoch astrometry and photometry are presented. Finally, Gaia DR2 also represents a new materialisation of the celestial reference frame in the optical, the Gaia-CRF2, which is the first optical reference frame based solely on extragalactic sources. There are notable changes in the photometric system and the catalogue source list with respect to Gaia DR1, and we stress the need to consider the two data releases as independent. Conclusions: Gaia DR2 represents a major achievement for the Gaia mission, delivering on the long standing promise to provide parallaxes and proper motions for over 1 billion stars, and representing a first step in the availability of complementary radial velocity and source astrophysical information for a sample of stars in the Gaia survey which covers a very substantial fraction of the volume of our galaxy.
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 616, pp.id.A1. 〈10.1051/0004-6361/201833051〉
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https://hal.archives-ouvertes.fr/hal-01867401
Contributeur : Marie-Paule Pomies <>
Soumis le : mardi 4 septembre 2018 - 12:11:19
Dernière modification le : lundi 26 novembre 2018 - 17:20:02

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Collaboration Gaia, A. Brown, A. Vallenari, T. Prusti, J. De Bruijne, et al.. Gaia Data Release 2. Summary of the contents and survey properties. Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 616, pp.id.A1. 〈10.1051/0004-6361/201833051〉. 〈hal-01867401〉

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