author        = "Gaia Collaboration and Brown, A. G. A. and Vallenari, A.
                       and Prusti, T. and de Bruijne, J. H. J. and Babusiaux, C.
                       and Bailer-Jones, C. A. L. and Biermann, M. and Evans, D.
                       W. and Eyer, L. and Jansen, F. and Jordi, C. and Klioner,
                       S. A. and Lammers, U. and Lindegren, L. and Luri, X. and
                       Mignard, F. and Panem, C. and Pourbaix, D. and Randich, S.
                       and Sartoretti, P. and Siddiqui, H. I. and Soubiran, C. and
                       van Leeuwen, F. and Walton, N. A. and Arenou, F. and
                       Bastian, U. and Cropper, M. and Drimmel, R. and Katz, D.
                       and Lattanzi, M. G. and Bakker, J. and Cacciari, C. and
                       Castañeda, J. and Chaoul, L. and Cheek, N. and De Angeli,
                       F. and Fabricius, C. and Guerra, R. and Holl, B. and
                       Masana, E. and Messineo, R. and Mowlavi, N. and
                       Nienartowicz, K. and Panuzzo, P. and Portell, J. and
                       Riello, M. and Seabroke, G. M. and Tanga, P. and Thévenin,
                       F. and Gracia-Abril, G. and Comoretto, G. and
                       Garcia-Reinaldos, M. and Teyssier, D. and Altmann, M. and
                       Andrae, R. and Audard, M. and Bellas-Velidis, I. and
                       Benson, K. and Berthier, J. and Blomme, R. and Burgess, P.
                       and Busso, G. and Carry, B. and Cellino, A. and Clementini,
                       G. and Clotet, M. and Creevey, O. and Davidson, M. and De
                       Ridder, J. and Delchambre, L. and Dell'Oro, A. and
                       Ducourant, C. and Fernández-Hernández, J. and Fouesneau,
                       M. and Frémat, Y. and Galluccio, L. and García-Torres, M.
                       and González-Núñez, J. and González-Vidal, J. J. and
                       Gosset, E. and Guy, L. P. and Halbwachs, J.-L. and Hambly,
                       N. C. and Harrison, D. L. and Hernández, J. and
                       Hestroffer, D. and Hodgkin, S. T. and Hutton, A. and
                       Jasniewicz, G. and Jean-Antoine-Piccolo, A. and Jordan, S.
                       and Korn, A. J. and Krone-Martins, A. and Lanzafame, A. C.
                       and Lebzelter, T. and Löffler, W. and Manteiga, M. and
                       Marrese, P. M. and Martín-Fleitas, J. M. and Moitinho, A.
                       and Mora, A. and Muinonen, K. and Osinde, J. and Pancino,
                       E. and Pauwels, T. and Petit, J.-M. and Recio-Blanco, A.
                       and Richards, P. J. and Rimoldini, L. and Robin, A. C. and
                       Sarro, L. M. and Siopis, C. and Smith, M. and Sozzetti, A.
                       and Süveges, M. and Torra, J. and van Reeven, W. and
                       Abbas, U. and Abreu Aramburu, A. and Accart, S. and Aerts,
                       C. and Altavilla, G. and Álvarez, M. A. and Alvarez, R.
                       and Alves, J. and Anderson, R. I. and Andrei, A. H. and
                       Anglada Varela, E. and Antiche, E. and Antoja, T. and
                       Arcay, B. and Astraatmadja, T. L. and Bach, N. and Baker,
                       S. G. and Balaguer-Núñez, L. and Balm, P. and Barache, C.
                       and Barata, C. and Barbato, D. and Barblan, F. and Barklem,
                       P. S. and Barrado, D. and Barros, M. and Barstow, M. A. and
                       Bartholomé Muñoz, S. and Bassilana, J.-L. and Becciani,
                       U. and Bellazzini, M. and Berihuete, A. and Bertone, S. and
                       Bianchi, L. and Bienaymé, O. and Blanco-Cuaresma, S. and
                       Boch, T. and Boeche, C. and Bombrun, A. and Borrachero, R.
                       and Bossini, D. and Bouquillon, S. and Bourda, G. and
                       Bragaglia, A. and Bramante, L. and Breddels, M. A. and
                       Bressan, A. and Brouillet, N. and Brüsemeister, T. and
                       Brugaletta, E. and Bucciarelli, B. and Burlacu, A. and
                       Busonero, D. and Butkevich, A. G. and Buzzi, R. and Caffau,
                       E. and Cancelliere, R. and Cannizzaro, G. and
                       Cantat-Gaudin, T. and Carballo, R. and Carlucci, T. and
                       Carrasco, J. M. and Casamiquela, L. and Castellani, M. and
                       Castro-Ginard, A. and Charlot, P. and Chemin, L. and
                       Chiavassa, A. and Cocozza, G. and Costigan, G. and Cowell,
                       S. and Crifo, F. and Crosta, M. and Crowley, C. and
                       Cuypers, J. and Dafonte, C. and Damerdji, Y. and
                       Dapergolas, A. and David, P. and David, M. and de Laverny,
                       P. and De Luise, F. and De March, R. and de Martino, D. and
                       de Souza, R. and de Torres, A. and Debosscher, J. and del
                       Pozo, E. and Delbo, M. and Delgado, A. and Delgado, H. E.
                       and Di Matteo, P. and Diakite, S. and Diener, C. and
                       Distefano, E. and Dolding, C. and Drazinos, P. and Durán,
                       J. and Edvardsson, B. and Enke, H. and Eriksson, K. and
                       Esquej, P. and Eynard Bontemps, G. and Fabre, C. and
                       Fabrizio, M. and Faigler, S. and Falcão, A. J. and Farràs
                       Casas, M. and Federici, L. and Fedorets, G. and Fernique,
                       P. and Figueras, F. and Filippi, F. and Findeisen, K. and
                       Fonti, A. and Fraile, E. and Fraser, M. and Frézouls, B.
                       and Gai, M. and Galleti, S. and Garabato, D. and
                       García-Sedano, F. and Garofalo, A. and Garralda, N. and
                       Gavel, A. and Gavras, P. and Gerssen, J. and Geyer, R. and
                       Giacobbe, P. and Gilmore, G. and Girona, S. and Giuffrida,
                       G. and Glass, F. and Gomes, M. and Granvik, M. and Gueguen,
                       A. and Guerrier, A. and Guiraud, J. and
                       Gutiérrez-Sánchez, R. and Haigron, R. and Hatzidimitriou,
                       D. and Hauser, M. and Haywood, M. and Heiter, U. and Helmi,
                       A. and Heu, J. and Hilger, T. and Hobbs, D. and Hofmann, W.
                       and Holland, G. and Huckle, H. E. and Hypki, A. and Icardi,
                       V. and Janßen, K. and Jevardat de Fombelle, G. and Jonker,
                       P. G. and Juhász, Á. L. and Julbe, F. and Karampelas, A.
                       and Kewley, A. and Klar, J. and Kochoska, A. and Kohley, R.
                       and Kolenberg, K. and Kontizas, M. and Kontizas, E. and
                       Koposov, S. E. and Kordopatis, G. and Kostrzewa-Rutkowska,
                       Z. and Koubsky, P. and Lambert, S. and Lanza, A. F. and
                       Lasne, Y. and Lavigne, J.-B. and Le Fustec, Y. and Le
                       Poncin-Lafitte, C. and Lebreton, Y. and Leccia, S. and
                       Leclerc, N. and Lecoeur-Taibi, I. and Lenhardt, H. and
                       Leroux, F. and Liao, S. and Licata, E. and Lindstrøm, H.
                       E. P. and Lister, T. A. and Livanou, E. and Lobel, A. and
                       López, M. and Managau, S. and Mann, R. G. and Mantelet, G.
                       and Marchal, O. and Marchant, J. M. and Marconi, M. and
                       Marinoni, S. and Marschalkó, G. and Marshall, D. J. and
                       Martino, M. and Marton, G. and Mary, N. and Massari, D. and
                       Matijevič, G. and Mazeh, T. and McMillan, P. J. and
                       Messina, S. and Michalik, D. and Millar, N. R. and Molina,
                       D. and Molinaro, R. and Molnár, L. and Montegriffo, P. and
                       Mor, R. and Morbidelli, R. and Morel, T. and Morris, D. and
                       Mulone, A. F. and Muraveva, T. and Musella, I. and
                       Nelemans, G. and Nicastro, L. and Noval, L. and O'Mullane,
                       W. and Ordénovic, C. and Ordóñez-Blanco, D. and Osborne,
                       P. and Pagani, C. and Pagano, I. and Pailler, F. and
                       Palacin, H. and Palaversa, L. and Panahi, A. and Pawlak, M.
                       and Piersimoni, A. M. and Pineau, F.-X. and Plachy, E. and
                       Plum, G. and Poggio, E. and Poujoulet, E. and Prša, A. and
                       Pulone, L. and Racero, E. and Ragaini, S. and Rambaux, N.
                       and Ramos-Lerate, M. and Regibo, S. and Reylé, C. and
                       Riclet, F. and Ripepi, V. and Riva, A. and Rivard, A. and
                       Rixon, G. and Roegiers, T. and Roelens, M. and
                       Romero-Gómez, M. and Rowell, N. and Royer, F. and
                       Ruiz-Dern, L. and Sadowski, G. and Sagristà Sellés, T.
                       and Sahlmann, J. and Salgado, J. and Salguero, E. and
                       Sanna, N. and Santana-Ros, T. and Sarasso, M. and Savietto,
                       H. and Schultheis, M. and Sciacca, E. and Segol, M. and
                       Segovia, J. C. and Ségransan, D. and Shih, I.-C. and
                       Siltala, L. and Silva, A. F. and Smart, R. L. and Smith, K.
                       W. and Solano, E. and Solitro, F. and Sordo, R. and Soria
                       Nieto, S. and Souchay, J. and Spagna, A. and Spoto, F. and
                       Stampa, U. and Steele, I. A. and Steidelmüller, H. and
                       Stephenson, C. A. and Stoev, H. and Suess, F. F. and
                       Surdej, J. and Szabados, L. and Szegedi-Elek, E. and
                       Tapiador, D. and Taris, F. and Tauran, G. and Taylor, M. B.
                       and Teixeira, R. and Terrett, D. and Teyssandier, P. and
                       Thuillot, W. and Titarenko, A. and Torra Clotet, F. and
                       Turon, C. and Ulla, A. and Utrilla, E. and Uzzi, S. and
                       Vaillant, M. and Valentini, G. and Valette, V. and van
                       Elteren, A. and Van Hemelryck, E. and van Leeuwen, M. and
                       Vaschetto, M. and Vecchiato, A. and Veljanoski, J. and
                       Viala, Y. and Vicente, D. and Vogt, S. and von Essen, C.
                       and Voss, H. and Votruba, V. and Voutsinas, S. and
                       Walmsley, G. and Weiler, M. and Wertz, O. and Wevers, T.
                       and Wyrzykowski, Ł. and Yoldas, A. and Žerjal, M. and
                       Ziaeepour, H. and Zorec, J. and Zschocke, S. and Zucker, S.
                       and Zurbach, C. and Zwitter, T.",
      title         = "{Gaia Data Release 2. Summary of the contents and survey
      year          = "2018",