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Jean-Antoine-Piccolo, A.J. Falc\\~ao, A.J. Korn, A. Karampelas, A. Kewley, A. Kochoska, A. Krone-Martins, \\'A.L. Juh\\'asz, A. Lobel, A. Moitinho, A. Mora, A.M. Piersimoni, A. Panahi, A. Pr\\v{s}a, A. Recio-Blanco, A. Riva, A. Rivard, A. Sozzetti, A. Spagna, A. Titarenko, A. Ulla, A. Vallenari, A. vanElteren, A. Vecchiato, A. Yoldas, B. Arcay, B. Bucciarelli, B. Carry, B. Edvardsson, B. Fr\\'ezouls, B. Holl, C. Aerts, C.A.L. Bailer-Jones, C.A. Stephenson, C. Babusiaux, C. Barache, C. Barata, C. Boeche, C. Cacciari, C. Crowley, C. Dafonte, C. Diener, C. Dolding, C. Ducourant, C. Fabre, C. Fabricius, C. Jordi, C. Leponcin-Lafitte, C. Ord\\'enovic, C. Pagani, C. Panem, C. Reyl\\'e, C. Siopis, C. Soubiran, C. Turon, C. vonEssen, C. Zurbach, D. Barbato, D. Barrado, D. Bossini, D. Busonero, D. deMartino, D. Garabato, D. Hatzidimitriou, D. Hestroffer, D. Hobbs, D.J. Marshall, D. Katz, D.L. Harrison, D. Massari, D. Michalik, D. Molina, D. Morris, D. Ord\\'o\\~nez-Blanco, D. Pourbaix, D. S\\'egransan, D. Tapiador, D. Terrett, D. Teyssier, D. Vicente, D.W. Evans, E. Anglada Varela, E. Antiche, E. Brugaletta, E. Caffau, E. delPozo, E. Distefano, E. Fraile, E. Gosset, E. Kontizas, E. Licata, E. Livanou, E. Masana, E. Pancino, E. Plachy, E. Poggio, E. Poujoulet, E. Racero, E. Salguero, E. Sciacca, E. Solano, E. Szegedi-Elek, E. Utrilla, E. Van Hemelryck, F. Arenou, F. Barblan, F. Crifo, F. DeAngeli, F. DeLuise, F. Figueras, F. Filippi, F.F. Suess, F. Garc\\'ia-Sedano, F. Glass, F. Jansen, F. Julbe, F. Leroux, F. Mignard, F. Pailler, F. Riclet, F. Royer, F. Solitro, F. Spoto, F. Taris, F. Th\\'evenin, F. TorraClotet, F. van Leeuwen, F.-X. Pineau, Gaia Collaboration, G. Altavilla, G. Bourda, G. Busso, G. Cannizzaro, G. Clementini, G. Cocozza, G. Comoretto, G. Costigan, G. Eynard Bontemps, G. Fedorets, G. Gilmore, G. Giuffrida, G. Gracia-Abril, G. Holland, G. Jasniewicz, G. JevardatdeFombelle, G. Kordopatis, G. Mantelet, G. Marschalk\\'o, G. Marton, G. Matijevi\\v{c}, G.M. Seabroke, G. Nelemans, G. Plum, G. Rixon, G. Sadowski, G. Tauran, G. Valentini, G. Walmsley, H.E. Delgado, H.E. Huckle, H. Enke, H.E.P. Lindstr{\\o}m, H.I. Siddiqui, H. Lenhardt, H. Palacin, H. Savietto, H. Steidelm\\\"uller, H. Stoev, H. Voss, H. Ziaeepour, I.A. Steele, I. Bellas-Velidis, I-C. Shih, I. Lecoeur-Taibi, I. Musella, I. Pagano, J. Alves, J. Bakker, J. Berthier, J.-B. Lavigne, J. Casta\\~neda, J.C. Segovia, J. Cuypers, J. Debosscher, J. DeRidder, J. Dur\\'an, J. Fern\\'andez-Hern\\'andez, J. Gerssen, J. Gonz\\'alez-N\\'u\\~nez, J. Guiraud, J. Hern\\'andez, J. Heu, J.H.J. de Bruijne, J.J. Gonz\\'alez-Vidal, J. Klar, J.-L. Bassilana, J.-L. Halbwachs, J.M. Carrasco, J.M. Marchant, J.M. Mart\\'in-Fleitas, J.-M. Petit, J. Osinde, J. Portell, J. Sahlmann, J. Salgado, J. Souchay, J. Surdej, J. Torra, J. Veljanoski, J. Zorec, K. Benson, K. Eriksson, K. Findeisen, K. Jan{\\ss}en, K. Kolenberg, K. Muinonen, K. Nienartowicz, K.W. Smith, L. Balaguer-N\\'u\\~nez, L. Bianchi, L. Bramante, L. Casamiquela, L. Chaoul, L. Chemin, L. Delchambre, L. Eyer, L. Federici, L. Galluccio, L. Lindegren, L. Moln\\'ar, L.M. Sarro, L. Nicastro, L. Noval, L. Palaversa, L.P. Guy, L. Pulone, L. Rimoldini, L. Ruiz-Dern, L. Siltala, L. Szabados, {\\L}. Wyrzykowski, M.A. \\'Alvarez, M.A. Barstow, M.A. Breddels, M. Altmann, M. Audard, M. Barros, M. Bellazzini, M. Biermann, M.B. Taylor, M. Castellani, M. Clotet, M. Cropper, M. Crosta, M. David, M. Davidson, M. Delbo, M. Fabrizio, M. Farr\\`as Casas, M. Fouesneau, M. Fraser, M. Gai, M. Garcia-Reinaldos, M. Garc\\'ia-Torres, M.G. Lattanzi, M. Gomes, M. Granvik, M. Hauser, M. Haywood, M. Kontizas, M. L\\'opez, M. Manteiga, M. Marconi, M. Martino, M. Pawlak, M. Ramos-Lerate, M. Riello, M. Roelens, M. Romero-G\\'omez, M. Sarasso, M. Schultheis, M. Segol, M. Smith, M. S\\\"uveges, M. Vaillant, M. van Leeuwen, M. Vaschetto, M. \\v{Z}erjal, M. Weiler, N.A. Walton, N. Bach, N. Brouillet, N.C. Hambly, N. Cheek, N. Garralda, N. Leclerc, N. Mary, N. Mowlavi, N. Rambaux, N.R. Millar, N. Rowell, N. Sanna, O. Bienaym\\'e, O. Creevey, O. Marchal, O. Wertz, P. Balm, P. Burgess, P. Charlot, P. David, P. deLaverny, P. Drazinos, P. Esquej, P. Fernique, P. Gavras, P. Giacobbe, P.G. Jonker, P.J. McMillan, P.J. Richards, P. Koubsky, P.M. Marrese, P. Montegriffo, P. Osborne, P. Panuzzo, P. Sartoretti, P.S. Barklem, P. Tanga, P. Teyssandier, R. Alvarez, R. Andrae, R. Blomme, R. Borrachero, R. Buzzi, R. Cancelliere, R. Carballo, R. DeMarch, R. deSouza, R. Drimmel, R. Geyer, R.G. Mann, R. Guerra, R. Guti\\'errez-S\\'anchez, R. Haigron, R.I. Anderson, R. Kohley, R.L. Smart, R. Messineo, R. Molinaro, R. Mor, R. Morbidelli, R. Sordo, R. Teixeira, S. Accart, S.A. Klioner, S. Bartholom\\'e Mu\\~noz, S. Bertone, S. Blanco-Cuaresma, S. Bouquillon, S. Cowell, S. Diakite, S.E. Koposov, S. Faigler, S. Galleti, S.G. Baker, S. Girona, S. Jordan, S. Lambert, S. Leccia, S. Liao, S. Managau, S. Marinoni, S. Messina, S. Ragaini, S. Randich, S. Regibo, S. SoriaNieto, S.T. Hodgkin, S. Uzzi, S. Vogt, S. Voutsinas, S. Zschocke, S. Zucker, T.A. Lister, T. Antoja, T. Boch, T. Br\\\"usemeister, T. Cantat-Gaudin, T. Carlucci, T. Hilger, T.L. Astraatmadja, T. Lebzelter, T. Mazeh, T. Morel, T. Muraveva, T. Pauwels, T. Prusti, T. Roegiers, T. Sagrist\\`a Sell\\'es, T. Santana-Ros, T. Wevers, T. Zwitter, U. Abbas, U. Bastian, U. Becciani, U. Heiter, U. Lammers, U. Stampa, V. Icardi, V. Ripepi, V. Valette, V. Votruba, W. Hofmann, W. L\\\"offler, W. O'Mullane, W. Thuillot, W. vanReeven, X. Luri, Y. Damerdji, Y. Fr\\'emat, Y. Lasne, Y. Lebreton, Y. LeFustec, Y. Viala, Z. Kostrzewa-Rutkowska","submitted_at":"2018-04-25T06:25:28Z","abstract_excerpt":"We highlight the power of the Gaia DR2 in studying many fine structures of the Hertzsprung-Russell diagram (HRD). Gaia allows us to present many different HRDs, depending in particular on stellar population selections. We do not aim here for completeness in terms of types of stars or stellar evolutionary aspects. Instead, we have chosen several illustrative examples. We describe some of the selections that can be made in Gaia DR2 to highlight the main structures of the Gaia HRDs. We select both field and cluster (open and globular) stars, compare the observations with previous classifications "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1804.09378","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-25T06:25:28Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"1aafe952eb93be02f9d585deb843f7858e1f73399097c7b936974b642161b10d","abstract_canon_sha256":"3ecc39cad2cc708ab9701f2dc3f82a967047bfeb87f72a3360bb5e67bea25b1f"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:08:07.353626Z","signature_b64":"IaGeKtLtgg0vyCYVNvzq+JZSejF98EIs7BX8DGKaw1A60M9Zkch7nnlAEtx8iw5+KeKhO5Whzr/slwxsnm3bCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c31c534fbc47768eeaa0d33a5a0e45ba3375d97c1708be232b268b5457b50cc","last_reissued_at":"2026-05-18T00:08:07.352943Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:08:07.352943Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Gaia Data Release 2: Observational Hertzsprung-Russell diagrams","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Abreu Aramburu, A. Berihuete, A. Bombrun, A. Bragaglia, A. Bressan, A. Burlacu, A. Castro-Ginard, A. Cellino, A. Chiavassa, A.C. Lanzafame, A.C. Robin, A. Dapergolas, A. Delgado, A. Dell'Oro, A. deTorres, A.F. Lanza, A.F. Mulone, A. Fonti, A.F. Silva, A.G.A. Brown, A. Garofalo, A. Gavel, A.G. Butkevich, A. Gueguen, A. Guerrier, A.H. Andrei, A. Helmi, A. Hutton, A. Hypki, A. Jean-Antoine-Piccolo, A.J. Falc\\~ao, A.J. Korn, A. Karampelas, A. Kewley, A. Kochoska, A. Krone-Martins, \\'A.L. Juh\\'asz, A. Lobel, A. Moitinho, A. Mora, A.M. Piersimoni, A. Panahi, A. Pr\\v{s}a, A. Recio-Blanco, A. Riva, A. Rivard, A. Sozzetti, A. Spagna, A. Titarenko, A. Ulla, A. Vallenari, A. vanElteren, A. Vecchiato, A. Yoldas, B. Arcay, B. Bucciarelli, B. Carry, B. Edvardsson, B. Fr\\'ezouls, B. Holl, C. Aerts, C.A.L. Bailer-Jones, C.A. Stephenson, C. Babusiaux, C. Barache, C. Barata, C. Boeche, C. Cacciari, C. Crowley, C. Dafonte, C. Diener, C. Dolding, C. Ducourant, C. Fabre, C. Fabricius, C. Jordi, C. Leponcin-Lafitte, C. Ord\\'enovic, C. Pagani, C. Panem, C. Reyl\\'e, C. Siopis, C. Soubiran, C. Turon, C. vonEssen, C. Zurbach, D. Barbato, D. Barrado, D. Bossini, D. Busonero, D. deMartino, D. Garabato, D. Hatzidimitriou, D. Hestroffer, D. Hobbs, D.J. Marshall, D. Katz, D.L. Harrison, D. Massari, D. Michalik, D. Molina, D. Morris, D. Ord\\'o\\~nez-Blanco, D. Pourbaix, D. S\\'egransan, D. Tapiador, D. Terrett, D. Teyssier, D. Vicente, D.W. Evans, E. Anglada Varela, E. Antiche, E. Brugaletta, E. Caffau, E. delPozo, E. Distefano, E. Fraile, E. Gosset, E. Kontizas, E. Licata, E. Livanou, E. Masana, E. Pancino, E. Plachy, E. Poggio, E. Poujoulet, E. Racero, E. Salguero, E. Sciacca, E. Solano, E. Szegedi-Elek, E. Utrilla, E. Van Hemelryck, F. Arenou, F. Barblan, F. Crifo, F. DeAngeli, F. DeLuise, F. Figueras, F. Filippi, F.F. Suess, F. Garc\\'ia-Sedano, F. Glass, F. Jansen, F. Julbe, F. Leroux, F. Mignard, F. Pailler, F. Riclet, F. Royer, F. Solitro, F. Spoto, F. Taris, F. Th\\'evenin, F. TorraClotet, F. van Leeuwen, F.-X. Pineau, Gaia Collaboration, G. Altavilla, G. Bourda, G. Busso, G. Cannizzaro, G. Clementini, G. Cocozza, G. Comoretto, G. Costigan, G. Eynard Bontemps, G. Fedorets, G. Gilmore, G. Giuffrida, G. Gracia-Abril, G. Holland, G. Jasniewicz, G. JevardatdeFombelle, G. Kordopatis, G. Mantelet, G. Marschalk\\'o, G. Marton, G. Matijevi\\v{c}, G.M. Seabroke, G. Nelemans, G. Plum, G. Rixon, G. Sadowski, G. Tauran, G. Valentini, G. Walmsley, H.E. Delgado, H.E. Huckle, H. Enke, H.E.P. Lindstr{\\o}m, H.I. Siddiqui, H. Lenhardt, H. Palacin, H. Savietto, H. Steidelm\\\"uller, H. Stoev, H. Voss, H. Ziaeepour, I.A. Steele, I. Bellas-Velidis, I-C. Shih, I. Lecoeur-Taibi, I. Musella, I. Pagano, J. Alves, J. Bakker, J. Berthier, J.-B. Lavigne, J. Casta\\~neda, J.C. Segovia, J. Cuypers, J. Debosscher, J. DeRidder, J. Dur\\'an, J. Fern\\'andez-Hern\\'andez, J. Gerssen, J. Gonz\\'alez-N\\'u\\~nez, J. Guiraud, J. Hern\\'andez, J. Heu, J.H.J. de Bruijne, J.J. Gonz\\'alez-Vidal, J. Klar, J.-L. Bassilana, J.-L. Halbwachs, J.M. Carrasco, J.M. Marchant, J.M. Mart\\'in-Fleitas, J.-M. Petit, J. Osinde, J. Portell, J. Sahlmann, J. Salgado, J. Souchay, J. Surdej, J. Torra, J. Veljanoski, J. Zorec, K. Benson, K. Eriksson, K. Findeisen, K. Jan{\\ss}en, K. Kolenberg, K. Muinonen, K. Nienartowicz, K.W. Smith, L. Balaguer-N\\'u\\~nez, L. Bianchi, L. Bramante, L. Casamiquela, L. Chaoul, L. Chemin, L. Delchambre, L. Eyer, L. Federici, L. Galluccio, L. Lindegren, L. Moln\\'ar, L.M. Sarro, L. Nicastro, L. Noval, L. Palaversa, L.P. Guy, L. Pulone, L. Rimoldini, L. Ruiz-Dern, L. Siltala, L. Szabados, {\\L}. Wyrzykowski, M.A. \\'Alvarez, M.A. Barstow, M.A. Breddels, M. Altmann, M. Audard, M. Barros, M. Bellazzini, M. Biermann, M.B. Taylor, M. Castellani, M. Clotet, M. Cropper, M. Crosta, M. David, M. Davidson, M. Delbo, M. Fabrizio, M. Farr\\`as Casas, M. Fouesneau, M. Fraser, M. Gai, M. Garcia-Reinaldos, M. Garc\\'ia-Torres, M.G. Lattanzi, M. Gomes, M. Granvik, M. Hauser, M. Haywood, M. Kontizas, M. L\\'opez, M. Manteiga, M. Marconi, M. Martino, M. Pawlak, M. Ramos-Lerate, M. Riello, M. Roelens, M. Romero-G\\'omez, M. Sarasso, M. Schultheis, M. Segol, M. Smith, M. S\\\"uveges, M. Vaillant, M. van Leeuwen, M. Vaschetto, M. \\v{Z}erjal, M. Weiler, N.A. Walton, N. Bach, N. Brouillet, N.C. Hambly, N. Cheek, N. Garralda, N. Leclerc, N. Mary, N. Mowlavi, N. Rambaux, N.R. Millar, N. Rowell, N. Sanna, O. Bienaym\\'e, O. Creevey, O. Marchal, O. Wertz, P. Balm, P. Burgess, P. Charlot, P. David, P. deLaverny, P. Drazinos, P. Esquej, P. Fernique, P. Gavras, P. Giacobbe, P.G. Jonker, P.J. McMillan, P.J. Richards, P. Koubsky, P.M. Marrese, P. Montegriffo, P. Osborne, P. Panuzzo, P. Sartoretti, P.S. Barklem, P. Tanga, P. Teyssandier, R. Alvarez, R. Andrae, R. Blomme, R. Borrachero, R. Buzzi, R. Cancelliere, R. Carballo, R. DeMarch, R. deSouza, R. Drimmel, R. Geyer, R.G. Mann, R. Guerra, R. Guti\\'errez-S\\'anchez, R. Haigron, R.I. Anderson, R. Kohley, R.L. Smart, R. Messineo, R. Molinaro, R. Mor, R. Morbidelli, R. Sordo, R. Teixeira, S. Accart, S.A. Klioner, S. Bartholom\\'e Mu\\~noz, S. Bertone, S. Blanco-Cuaresma, S. Bouquillon, S. Cowell, S. Diakite, S.E. Koposov, S. Faigler, S. Galleti, S.G. Baker, S. Girona, S. Jordan, S. Lambert, S. Leccia, S. Liao, S. Managau, S. Marinoni, S. Messina, S. Ragaini, S. Randich, S. Regibo, S. SoriaNieto, S.T. Hodgkin, S. Uzzi, S. Vogt, S. Voutsinas, S. Zschocke, S. Zucker, T.A. Lister, T. Antoja, T. Boch, T. Br\\\"usemeister, T. Cantat-Gaudin, T. Carlucci, T. Hilger, T.L. Astraatmadja, T. Lebzelter, T. Mazeh, T. Morel, T. Muraveva, T. Pauwels, T. Prusti, T. Roegiers, T. Sagrist\\`a Sell\\'es, T. Santana-Ros, T. Wevers, T. Zwitter, U. Abbas, U. Bastian, U. Becciani, U. Heiter, U. Lammers, U. Stampa, V. Icardi, V. Ripepi, V. Valette, V. Votruba, W. Hofmann, W. L\\\"offler, W. O'Mullane, W. Thuillot, W. vanReeven, X. Luri, Y. Damerdji, Y. Fr\\'emat, Y. Lasne, Y. Lebreton, Y. LeFustec, Y. Viala, Z. Kostrzewa-Rutkowska","submitted_at":"2018-04-25T06:25:28Z","abstract_excerpt":"We highlight the power of the Gaia DR2 in studying many fine structures of the Hertzsprung-Russell diagram (HRD). Gaia allows us to present many different HRDs, depending in particular on stellar population selections. We do not aim here for completeness in terms of types of stars or stellar evolutionary aspects. Instead, we have chosen several illustrative examples. We describe some of the selections that can be made in Gaia DR2 to highlight the main structures of the Gaia HRDs. 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