author        = "Gaia Collaboration and Babusiaux, C. and van Leeuwen, F.
                       and Barstow, M. A. and Jordi, C. and Vallenari, A. and
                       Bossini, D. and Bressan, A. and Cantat-Gaudin, T. and van
                       Leeuwen, M. and Brown, A. G. A. and Prusti, T. and de
                       Bruijne, J. H. J. and Bailer-Jones, C. A. L. and Biermann,
                       M. and Evans, D. W. and Eyer, L. and Jansen, F. 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 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 Bartholomé
                       Muñoz, L. 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 Bouquillon, S. and Bourda, G. and Bragaglia, A. and
                       Bramante, L. and Breddels, M. 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 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 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 Gutié, 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 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,
      title         = "{Gaia Data Release 2. Observational Hertzsprung-Russell
      year          = "2018",