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 M. Altmann 18 R. Andrae M. Audard 26 I. Bellas-Velidis K. Benson 27 J. Berthier 28 R. Blomme 29 P. Burgess 2 G. Busso 2 B. Carry 30 A. Cellino 31 G. Clementini 32 M. Clotet O. Creevey 33 M. Davidson 34 J. Deridder L. Delchambre A. Dell'Oro C. Ducourant 17 J. Fernández-Hernández M. Fouesneau Y. Frémat 29 L. Galluccio 35 M. García-Torres J. González-Núñez J. J. González-Vidal E. Gosset 36 L. P. Guy 37 J. -L. Halbwachs N. C. Hambly D. L. Harrison J. Hernandez 38 D. Hestroffer 39 S. T. Hodgkin 40 A. Hutton G. Jasniewicz 41 A. Jean-Antoine-Piccolo S. Jordan 42 A. J. Korn 43 A. Krone-Martins A. C. Lanzafame 44 T. Lebzelter W. Löffler M. Manteiga P. M. Marrese J. M. Martín-Fleitas A. Moitinho 45 A. Mora 46 K. Muinonen 47 J. Osinde E. Pancino 48 T. Pauwels 29 J. -M. Petit A. Recio-Blanco 14 P. J. Richards 49 L. Rimoldini A. C. Robin 50 L. M. Sarro C. Siopis M. Smith 51 A. Sozzetti M. Süveges J. Torra W. Vanreeven U. Abbas 52 A. Abreu Aramburu S. Accart C. Aerts 53 G. Altavilla M. A. Álvarez R. Alvarez J. Alves 54 R. I. Anderson 55 A. H. Andrei 56 E. Anglada Varela E. Antiche T. Antoja B. Arcay T. L. Astraatmadja 57 N. Bach 58 S. G. Baker 59 L. Balaguer-Núñez 60 P. Balm C. Barache 61 C. Barata 62 D. Barbato F. Barblan P. S. Barklem 63 D. Barrado 64 M. Barros S. Bartholomé Muñoz J. -L. Bassilana U. Becciani M. Bellazzini A. Berihuete Stefano Bertone L. Bianchi 65 O. Bienaymé 66 S. Blanco-Cuaresma 67 T. Boch C. Boeche A. Bombrun 68 R. Borrachero S. Bouquillon 61 G. Bourda 17 A. Bragaglia L. Bramante M. A. Breddels N. Brouillet 69 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 61 J. M. Carrasco 70 L. Casamiquela 17 M. Castellani 71 A. Castro-Ginard P. Charlot 17 L. Chemin A. Chiavassa 72 G. Cocozza G. Costigan S. Cowell 2 F. Crifo 1 M. Crosta C. Crowley 73 J. Cuypers 29 C. Dafonte Y. Damerdji 74 A. Dapergolas P. David 75 M. David P. Delaverny F. Deluise R. Demarch D. Demartino R. Desouza A. Detorres J. Debosscher 76 E. Delpozo M. Delbò 14 A. Delgado 77 H. E. Delgado S. Diakite 78 C. Diener E. Distefano C. Dolding P. Drazinos J. Durán B. Edvardsson 79 H. Enke K. Eriksson 63 P. Esquej G. Eynard Bontemps C. Fabre M. Fabrizio 80 S. Faigler A. J. Falcao 81 M. Farràs Casas L. Federici 82 G. Fedorets P. Fernique 66 F. Figueras 83 F. Filippi 84 K. Findeisen A. Fonti E. Fraile M. Fraser 10 B. Frézouls M. Gai 85 S. Galleti D. Garabato F. García-Sedano A. Garofalo 86 N. Garralda A. Gavel P. Gavras J. Gerssen R. Geyer P. Giacobbe G. Gilmore S. Girona G. Giuffrida F. Glass M. Gomes 87 M. Granvik A. Gueguen 88 A. Guerrier 89 J. Guiraud 90 R. Gutiérrez-Sánchez R. Haigron 1 D. Hatzidimitriou 91 M. Hauser M. Haywood 1 U. Heiter 79 A. Helmi 92 J. Heu T. Hilger D. Hobbs 93 W. Hofmann G. Holland H. E. Huckle A. Hypki V. Icardi K. Janßen G. Jevardatdefombelle P. G. Jonker 94 Á. L. Juhász F. Julbe A. Karampelas A. Kewley J. Klar A. Kochoska R. Kohley 30 K. Kolenberg M. Kontizas E. Kontizas S. E. Koposov 2 G. Kordopatis 14 Z. Kostrzewa-Rutkowska P. Koubsky S. Lambert 95 A. F. Lanza 44 Y. Lasne J. -B. Lavigne Y. Lefustec C. Leponcin-Lafitte Y. Lebreton 96 S. Leccia 97 N. Leclerc 98 I. Lecoeur-Taibi H. Lenhardt F. Leroux 99 S. Liao 100 E. Licata H. E. P. Lindstrøm T. A. Lister E. Livanou A. Lobel 29 M. Lopez 101 S. Managau R. G. Mann G. Mantelet 102 O. Marchal 103 J. M. Marchant 104 M. Marconi 105 S. Marinoni G. Marschalkó Gaia Collaboration 50
17 M2A 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
69 FORMATION STELLAIRE 2018
LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
81 CA3 - Computational Intelligence Research Group [Caparica]
UNINOVA - Universidade Nova de Lisboa, CTS - Centre of Technology and Systems
85 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〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01799668
Contributeur : Marie-Paule Pomies <>
Soumis le : vendredi 25 mai 2018 - 09:08:32
Dernière modification le : jeudi 21 février 2019 - 10:31:47

Lien texte intégral

Identifiants

Citation

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〉

Partager

Métriques

Consultations de la notice

1437