Gaia Data Release 2: Observational Hertzsprung-Russell diagrams

Collaboration Gaia C. Babusiaux 1 F. Van Leeuwen 2 M. A. Barstow 3 C. Jordi A. Vallenari D. Bossini A. Bressan 4 T. Cantat-Gaudin M. Van Leeuwen 5 A. G. A. Brown 6 T. Prusti 7 J. H. J. De Bruijne 8 C. A. L. Bailer-Jones M. Biermann 9 D. W. Evans 10 L. Eyer 11 F. Jansen 12 S. A. Klioner U. Lammers 7 L. Lindegren X. Luri 13 F. Mignard 14 C. Panem D. Pourbaix 15 S. Randich P. Sartoretti 1 H. I. Siddiqui 16 C. Soubiran 17 N. A. Walton 2 F. Arenou 1 U. Bastian 18 M. Cropper R. Drimmel D. Katz 1 M. G. Lattanzi J. Bakker 19 C. Cacciari 20 J. Castañeda L. Chaoul N. Cheek F. Deangeli C. Fabricius 13 R. Guerra 21 B. Holl 22 E. Masana 23 R. Messineo N. Mowlavi K. Nienartowicz P. Panuzzo 24 J. Portell M. Riello G. M. Seabroke P. Tanga 14 F. Thévenin 14 G. Gracia-Abril G. Comoretto 25 M. Garcia-Reinaldos D. Teyssier 26 M. Altmann 18 R. Andrae M. Audard 27 I. Bellas-Velidis K. Benson 28 J. Berthier 29 R. Blomme 30 P. Burgess 2 G. Busso 2 B. Carry 31 A. Cellino 32 G. Clementini 33 M. Clotet O. Creevey 34 M. Davidson 35 J. Deridder L. Delchambre A. Dell'Oro C. Ducourant 17 J. Fernández-Hernández M. Fouesneau Y. Frémat 30 L. Galluccio 36 M. García-Torres J. González-Núñez J. J. González-Vidal E. Gosset 37 L. P. Guy 38 J. -L. Halbwachs N. C. Hambly D. L. Harrison J. Hernandez 39 D. Hestroffer 40 S. T. Hodgkin 41 A. Hutton G. Jasniewicz 42 A. Jean-Antoine-Piccolo S. Jordan 43 A. J. Korn 44 A. Krone-Martins A. C. Lanzafame 45 T. Lebzelter W. Löffler M. Manteiga P. M. Marrese J. M. Martín-Fleitas A. Moitinho 46 A. Mora 47 K. Muinonen 48 J. Osinde E. Pancino 49 T. Pauwels 30 J. -M. Petit A. Recio-Blanco 14 P. J. Richards 50 L. Rimoldini A. C. Robin 51 L. M. Sarro C. Siopis M. Smith 52 A. Sozzetti M. Süveges J. Torra W. Vanreeven U. Abbas 53 A. Abreu Aramburu S. Accart C. Aerts 54 G. Altavilla M. A. Álvarez R. Alvarez J. Alves 55 R. I. Anderson 56 A. H. Andrei 57 E. Anglada Varela E. Antiche T. Antoja B. Arcay T. L. Astraatmadja 58 N. Bach 59 S. G. Baker 60 L. Balaguer-Núñez 61 P. Balm C. Barache 62 C. Barata 63 D. Barbato F. Barblan P. S. Barklem 64 D. Barrado 65 M. Barros S. Bartholomé Muñoz J. -L. Bassilana U. Becciani M. Bellazzini A. Berihuete S. Bertone L. Bianchi 66 O. Bienaymé 67 S. Blanco-Cuaresma 68 T. Boch C. Boeche A. Bombrun 69 R. Borrachero S. Bouquillon 62 G. Bourda 17 A. Bragaglia L. Bramante M. A. Breddels N. Brouillet 70 T. Brüsemeister E. Brugaletta B. Bucciarelli A. Burlacu D. Busonero A. G. Butkevich R. Buzzi E. Caffau 1 R. Cancelliere G. Cannizzaro R. Carballo T. Carlucci 62 J. M. Carrasco 71 L. Casamiquela 17 M. Castellani 72 A. Castro-Ginard P. Charlot 17 L. Chemin A. Chiavassa 73 G. Cocozza G. Costigan S. Cowell 2 F. Crifo 1 M. Crosta C. Crowley 74 J. Cuypers 30 C. Dafonte Y. Damerdji 75 A. Dapergolas P. David 76 M. David P. Delaverny F. Deluise R. Demarch D. Demartino R. Desouza A. Detorres J. Debosscher 77 E. Delpozo M. Delbò 14 A. Delgado 78 H. E. Delgado S. Diakite 79 C. Diener E. Distefano C. Dolding P. Drazinos J. Durán B. Edvardsson 80 H. Enke K. Eriksson 64 P. Esquej G. Eynard Bontemps C. Fabre M. Fabrizio 81 S. Faigler A. J. Falcao 82 M. Farràs Casas L. Federici 83 G. Fedorets P. Fernique 67 F. Figueras 84 F. Filippi 85 K. Findeisen A. Fonti E. Fraile M. Fraser 10 B. Frézouls M. Gai 86 S. Galleti D. Garabato F. García-Sedano A. Garofalo 87 N. Garralda A. Gavel P. Gavras J. Gerssen R. Geyer P. Giacobbe G. Gilmore S. Girona G. Giuffrida F. Glass M. Gomes 88 M. Granvik A. Gueguen 89 A. Guerrier 90 J. Guiraud 91 R. Gutiérrez-Sánchez R. Haigron 1 D. Hatzidimitriou 92 M. Hauser M. Haywood 1 U. Heiter 80 A. Helmi 93 J. Heu T. Hilger D. Hobbs 94 W. Hofmann G. Holland H. E. Huckle A. Hypki V. Icardi K. Janßen G. Jevardatdefombelle P. G. Jonker 95 Á. L. Juhász F. Julbe A. Karampelas A. Kewley J. Klar A. Kochoska R. Kohley 31 K. Kolenberg M. Kontizas E. Kontizas S. E. Koposov 2 G. Kordopatis 14 Z. Kostrzewa-Rutkowska P. Koubsky S. Lambert 96 A. F. Lanza 45 Y. Lasne J. -B. Lavigne Y. Lefustec C. Leponcin-Lafitte Y. Lebreton 97 S. Leccia 98 N. Leclerc 99 I. Lecoeur-Taibi H. Lenhardt F. Leroux 100 S. Liao 101 E. Licata H. E. P. Lindstrøm T. A. Lister E. Livanou A. Lobel 30 M. Lopez 102 S. Managau R. G. Mann G. Mantelet 103 O. Marchal 104 J. M. Marchant 105 M. Marconi 106 S. Marinoni G. Marschalkó Gaia Collaboration 51
17 M2A 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
70 FORMATION STELLAIRE 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
82 CA3 - Computational Intelligence Research Group [Caparica]
UNINOVA - Universidade Nova de Lisboa, CTS - Centre of Technology and Systems
86 Astrometry
OATo - INAF - Osservatorio Astrofisico di Torino
Abstract : 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 and with stellar evolutionary tracks, and we present variations of the Gaia HRD with age, metallicity, and kinematics. Late stages of stellar evolution such as hot subdwarfs, post-AGB stars, planetary nebulae, and white dwarfs are also analysed, as well as low-mass brown dwarf objects. The Gaia HRDs are unprecedented in both precision and coverage of the various Milky Way stellar populations and stellar evolutionary phases. Many fine structures of the HRDs are presented. The clear split of the white dwarf sequence into hydrogen and helium white dwarfs is presented for the first time in an HRD. The relation between kinematics and the HRD is nicely illustrated. Two different populations in a classical kinematic selection of the halo are unambiguously identified in the HRD. Membership and mean parameters for a selected list of open clusters are provided. They allow drawing very detailed cluster sequences, highlighting fine structures, and providing extremely precise empirical isochrones that will lead to more insight in stellar physics. Gaia DR2 demonstrates the potential of combining precise astrometry and photometry for large samples for studies in stellar evolution and stellar population and opens an entire new area for HRD-based studies.
Type de document :
Article dans une revue
Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 616, pp.id.A10. 〈10.1051/0004-6361/201832843〉
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https://hal.archives-ouvertes.fr/hal-01799668
Contributeur : Marie-Paule Pomies <>
Soumis le : vendredi 25 mai 2018 - 09:08:32
Dernière modification le : jeudi 13 décembre 2018 - 17:30:03

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Collaboration Gaia, C. Babusiaux, F. Van Leeuwen, M. A. Barstow, C. Jordi, et al.. Gaia Data Release 2: Observational Hertzsprung-Russell diagrams. Astronomy and Astrophysics - A&A, EDP Sciences, 2018, 616, pp.id.A10. 〈10.1051/0004-6361/201832843〉. 〈hal-01799668〉

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