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

A. Brown A. Vallenari T. Prusti 1 J. de Bruijne C. Babusiaux 2, 3 C. Bailer-Jones M. Biermann D. Evans L. Eyer 4 F. Jansen 5 C. Jordi S. Klioner U. Lammers L. Lindegren X. Luri 6 F. Mignard 7 C. Panem D. Pourbaix 8 S. Randich P. Sartoretti 2 H. Siddiqui 9 C. Soubiran 10 F. Van Leeuwen A. Walton F. Arenou 2 U. Bastian 11 M. Cropper R. Drimmel D. Katz 2 M. Lattanzi 12 J. Bakker 13 C. Cacciari 14 J. Castañeda L. Chaoul N. Cheek F. de Angeli 15 C. Fabricius 16 R. Guerra 17 B. Holl 18 E. Masana 19 R. Messineo N. Mowlavi K. Nienartowicz P. Panuzzo 20 J. Portell M. Riello M. Seabroke P. Tanga 7 F. Thevenin 7 G. Gracia-Abril G. Comoretto 21 M. Garcia-Reinaldos D. Teyssier M. Altmann 22 R. Andrae M. Audard 23 I. Bellas-Velidis K. Benson J. Berthier R. Blomme 24 P. Burgess 15 G. Busso 15 B. Carry 25 A. Cellino 26 G. Clementini 27 M. Clotet O. Creevey 28 M. David J. de Ridder 20 L. Delchambre A. Dell’oro C. Ducourant 10 J. Hernandez 29 M. Fouesneau Y. Frémat 2 L. Galluccio 30 M. García-Torres J. González-Núñez J. González-Vidal E. Gosset 31 P. Guy 32 J. Halbwachs C. Hambly D. Harrison D. Hestroffer 33 T. Hodgkin A. Hutton Gérard Jasniewicz 34 A. Jean-Antoine-Piccolo S. Jordan 35 J. Korn A. Krone-Martins 36 C. Lanza T. Lebzelter W. Löffler M. Manteiga M. Marrese J. Martín-Fleitas A. Moitinho 37 A. Mor K. Muinonen 38 J. Osinde E. Pancino 39 T. Pauwels 24 J. Petit 40 A. Recio-Blanco 7 J. Richards L. Rimoldini C. Robin M. Sarro C. Siopis M. Smith A. Sozzetti M. Süveges J. Torra W. Van Reeven U. Abbas 41 A. Abreu Aramburu S. Accart C. Aerts 42 G. Altavilla M. Álvarez R. Alvarez J. Alves R. Anderson H. Andrei E. Anglada Varela E. Antiche T. Antoja B. Arcay T. Astraatmadja 43 N. Bach 44 S. Baker L. Balaguer-Nunez 45 P. Balm C. Barache 22 C. Barata 46 D. Barbato F. Barblan S. Barklem D. Barrado 47 M. Barros M. Barstow 48 S. Bartholomé Muñoz J. Bassilana U. Becciani M. Bellazzini A. Berihuete Stefano Bertone L. Bianchi 49 O. Bienaymé 50 S. Blanco-Cuaresma 51 T. Boch C. Boeche A. Bombrun 52 R. Borrachero D. Bossini S. Bouquillon 22 G. Bourda 10 A. Bragaglia L. Bramante M. Breddels A. Bressan 53 N. Brouillet 54 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 22 J. Carrasco 55 L. Casamiquela 10 M. Castellani 56 A. Castro-Ginard P. Charlot 10 L. Chemin A. Chiavassa 34 G. Cocozza G. Costigan S. Cowell 15 F. Crifo 2 M. Crosta C. Crowley J. Cuypers† C. Dafonte Y. Damerdji 57 A. Dapergolas P. David P. de Laverny 7 F. de Luise 58 R. de March D. Martino 59 R. de Souza A. de Torres J. Debosscher 60 E. Del Pozo M. Delbò 7 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 26 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 7 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, 83 S. Leccia N. Leclerc 84 I. Lecoeur-Taibi H. Lenhardt F. Leroux S. Liao 85 E. Licata H. Lindstrøm T. Lister E. Livanou A. Lobel 24 M. López S. Managau G. Mann 86 G. Mantelet 87 O. Marchal 88 J. Marchant 89 M. Marconi S. Marinoni G. Marschalkó D. J. Marshall 90 M. Martino G. Marton 91 N. Mary 92 D. Massari G. Matijevič T. Mazeh 93 J. Mcmillan S. Messina D. Michalik R. Millar 94 D. Molina R. Molinaro 95 L. Molnar 96 P. Montegriffo R. Mor R. Morbidelli T. Morel D. Morris 97 A. Mulone T. Muraveva I. Musella G. Nelemans L. Nicastro L. Noval W. O’mullane C. Ordenovic 7 D. Ordóñez-Blanco P. Osborne C. Pagani I. Pagano F. Pailler 98 H. Palacin L. Palaversa A. Panahi M. Pawlak M. Piersimoni F. Pineau 99 E. Plachy G. Plum E. Poggio E. Poujoulet A. Prša L. Pulone E. Racero S. Ragaini N. Rambaux 33 M. Ramos-Lerate S. Regibo C. Reyle 100 F. Riclet V. Ripepi 101 A. Riva 102 A. Rivard G. Rixon 15 T. Roegiers M. Roelens 103 M. Romero-Gomez 104 N. Rowell F. Royer 2 L. Ruiz-Dern 74 G. Sadowski 105 T. Sagristà Sellés J. Sahlmann J. Salgado 106 E. Salguero N. Sanna T. Santana-Ros 107 M. Sarasso H. Savietto M. Schultheis 100 E. Sciacca M. Segol 108 C. Segovia D. Segransan 51 C. Shih 109 L. Siltala A. Silva R. Smart 26 W. Smith E. Solano 110 F. Solitro R. Sordo S. Soria Nieto J. Souchay 22 A. Spagna F. Spoto 111 U. Stampa A. Steele 112 H. Steidelmüller C. Stephenson H. Stoev F. Suess J. Surdej 113 L. Szabados 114 E. Szegedi-Elek D. Tapiador F. Taris G. Tauran M. Taylor R. Teixeira 115 D. Terrett P. Teyssandier 22 W. Thuillot 33 A. Titarenko F. Torra Clotet C. Turon 2 A. Ulla E. Utrilla S. Uzzi M. Vaillant 116 G. Valentini 117 V. Valette 118 A. Van Elteren E. Van Hemelryck M. Van Leeuwen M. Vaschetto A. Vecchiato 119 J. Veljanoski Y. Viala 2 D. Vicente 120 S. Vogt 121 C. Von Essen H. Voss V. Votruba S. Voutsinas G. Walmsley M. Weiler 122 O. Wertz T. Wevers 123 Ł. Wyrzykowski A. Yoldas 15 M. Žerjal H. Ziaeepour 124 J. Zorec 125 S. Zschocke 126 S. Zucker 127 C. Zurbach 128 T. Zwitter
10 M2A 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
54 FORMATION STELLAIRE 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
88 PSPM - Probabilités, statistique, physique mathématique
ICJ - Institut Camille Jordan [Villeurbanne]
118 Equipe EES
EBI - Ecologie et biologie des interactions
119 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.
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Submitted on : Wednesday, March 6, 2019 - 1:39:24 PM
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A. Brown, A. Vallenari, T. Prusti, J. de Bruijne, C. Babusiaux, 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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