Torus Models of the Outer Disc of the Milky Way using LAMOST Survey Data
TLDR
In this paper, the authors constructed torus models in a large volume extending, for the first time, from the solar vicinity to a Galactocentric distance of $\sim 20$ kpc, reaching the outskirts of the Galactic disc.Abstract:
With a sample of 48,161 K giant stars selected from the LAMOST DR 2 catalogue, we construct torus models in a large volume extending, for the first time, from the solar vicinity to a Galactocentric distance of $\sim 20$ kpc, reaching the outskirts of the Galactic disc. We show that the kinematics of the K giant stars match conventional models, e.g. as created by Binney in 2012, in the Solar vicinity. However such two-disc models fail if they are extended to the outer regions, even if an additional disc component is utilised. If we loosen constraints in the Sun's vicinity, we find that an effective thick disc model could explain the anti-centre of the MW. The LAMOST data imply that the sizes of the Galactic discs are much larger, and that the outer disc is much thicker, than previously thought, or alternatively that the outer structure is not a conventional disc at all. However, the velocity dispersion $\sigma_{0z}$ of the kinematically thick disc in the best-fitting model is about 80 km s$^{-1}$ and has a scale parameter $R_{\sigma}$ for an exponential distribution function of $\sim 19$ kpc. Such a height $\sigma_{0z}$ is strongly rejected by current measurements in the solar neighbourhood, and thus a model beyond quasi-thermal, two or three thin or thick discs is required.read more
Citations
More filters
Journal ArticleDOI
Mapping the Milky Way with LAMOST– III. Complicated spatial structure in the outer disc
TL;DR: In this paper, the stellar volume densities of the red giant branch stars with a two-disc component model were analyzed and it was shown that the outer disc of the Galactic outer disc can extend to approximately 19kpc.
Journal ArticleDOI
Gaia Early Data Release 3: The Galactic anticentre
Teresa Antoja,Paul J. McMillan,G. Kordopatis,P. Ramos,Amina Helmi,E. Balbinot,Tristan Cantat-Gaudin,Laurent Chemin,F. Figueras,Carme Jordi,Sanjeev Khanna,M. Romero-Gómez,George M. Seabroke,Anthony G. A. Brown,Antonella Vallenari,Timo Prusti,J. H. J. de Bruijne,Carine Babusiaux,Carine Babusiaux,M. Biermann,O. L. Creevey,D. W. Evans,L. Eyer,A. Hutton,F. A. Jansen,Sergei A. Klioner,Uwe Lammers,Lennart Lindegren,Xavier Luri,Francois Mignard,C. Panem,Dimitri Pourbaix,Sofia Randich,P. Sartoretti,Caroline Soubiran,N. A. Walton,Frédéric Arenou,C. A. L. Bailer-Jones,Ulrich Bastian,Mark Cropper,R. Drimmel,D. Katz,M. G. Lattanzi,M. G. Lattanzi,F. van Leeuwen,J. Bakker,J. Castañeda,F. De Angeli,C. Ducourant,C. Fabricius,Morgan Fouesneau,Yves Fremat,Raphael Guerra,A. Guerrier,J. Guiraud,A. Jean-Antoine Piccolo,Eduard Masana,R. Messineo,Nami Mowlavi,C. Nicolas,Krzysztof Nienartowicz,F. Pailler,P. Panuzzo,F. Riclet,W. Roux,Rosanna Sordo,Paolo Tanga,F. Thévenin,G. Gracia-Abril,Jordi Portell,David Teyssier,Martin Altmann,Martin Altmann,Rene Andrae,I. Bellas-Velidis,Kevin Benson,Jérôme Berthier,R. Blomme,E. Brugaletta,P. Burgess,G. Busso,Benoit Carry,Alberto Cellino,N. Cheek,Gisella Clementini,Yassine Damerdji,Michael Davidson,Ludovic Delchambre,Aldo Dell'Oro,J. Fernández-Hernández,Laurent Galluccio,Pedro García-Lario,M. Garcia-Reinaldos,J. González-Núñez,J. González-Núñez,Eric Gosset,R. Haigron,J. L. Halbwachs,Nigel Hambly,D. L. Harrison,Despina Hatzidimitriou,Ulrike Heiter,Jose M Hernandez,Daniel Hestroffer,Simon Hodgkin,B. Holl,K. Janßen,G. Jevardat de Fombelle,Stefan Jordan,Alberto Krone-Martins,Alberto Krone-Martins,A. C. Lanzafame,A. C. Lanzafame,W. Löffler,A. Lorca,Minia Manteiga,O. Marchal,P. M. Marrese,P. M. Marrese,André Moitinho,A. Mora,Karri Muinonen,Karri Muinonen,P. Osborne,Elena Pancino,Elena Pancino,T. Pauwels,Alejandra Recio-Blanco,P. J. Richards,M. Riello,Lorenzo Rimoldini,Annie C. Robin,T. Roegiers,Jan Rybizki,L. M. Sarro,Christos Siopis,Mike Smith,Alessandro Sozzetti,Ana Ulla,E. Utrilla,M. van Leeuwen,W. van Reeven,Ummi Abbas,A. Abreu Aramburu,S. Accart,Conny Aerts,Conny Aerts,Conny Aerts,J. J. Aguado,M. Ajaj,G. Altavilla,G. Altavilla,M. A. Álvarez,J. Álvarez Cid-Fuentes,João Alves,Richard I. Anderson,E. Anglada Varela,Marc Audard,D. Baines,S. G. Baker,L. Balaguer-Núñez,Zoltan Balog,Zoltan Balog,C. Barache,D. Barbato,D. Barbato,M. Barros,Martin A. Barstow,S. Bartolomé,J.-L. Bassilana,N. Bauchet,A. Baudesson-Stella,Ugo Becciani,Michele Bellazzini,M. Bernet,Stefano Bertone,Stefano Bertone,Stefano Bertone,Luciana Bianchi,Sergi Blanco-Cuaresma,T. Boch,Alex Bombrun,Diego Bossini,S. Bouquillon,Angela Bragaglia,L. Bramante,Elmé Breedt,Alessandro Bressan,N. Brouillet,Beatrice Bucciarelli,A. Burlacu,Deborah Busonero,A. G. Butkevich,R. Buzzi,Elisabetta Caffau,Rossella Cancelliere,Hector Canovas,Ruth Carballo,T. Carlucci,M. I. Carnerero,J. M. Carrasco,Laia Casamiquela,Marco Castellani,Alfred Castro-Ginard,P. Castro Sampol,L. Chaoul,Patrick Charlot,Andrea Chiavassa,Maria-Rosa L. Cioni,Giovanni Comoretto,W. J. Cooper,W. J. Cooper,T. Cornez,S. Cowell,F. Crifo,Mariateresa Crosta,C. Crowley,Carlos Dafonte,A. Dapergolas,M. David,P. David,P. de Laverny,F. De Luise,R. De March,J. De Ridder,R. E. de Souza,P. de Teodoro,A. de Torres,E. F. del Peloso,E. del Pozo,A. Delgado,H. E. Delgado,J.-B. Delisle,P. Di Matteo,S. Diakite,C. Diener,Elisa Distefano,C. Dolding,D. Eappachen,D. Eappachen,Harry Enke,P. Esquej,C. Fabre,M. Fabrizio,M. Fabrizio,Simchon Faigler,Grigori Fedorets,Grigori Fedorets,Pierre Fernique,Pierre Fernique,Agnes Fienga,Agnes Fienga,C. Fouron,Francesca Fragkoudi,E. Fraile,Felix Franke,Mario Gai,D. Garabato,A. Garcia-Gutierrez,Miguel García-Torres,A. Garofalo,P. Gavras,E. Gerlach,R. Geyer,Paolo Giacobbe,Gerry Gilmore,S. Girona,G. Giuffrida,Ángel Gómez,I. Gonzalez-Santamaria,J. J. González-Vidal,Mikael Granvik,Mikael Granvik,R. Gutiérrez-Sánchez,Leanne P. Guy,M. Hauser,M. Haywood,Sebastian L. Hidalgo,Sebastian L. Hidalgo,Thomas Hilger,N. Hładczuk,David Hobbs,G. Holland,H. E. Huckle,Gérard Jasniewicz,Peter G. Jonker,Peter G. Jonker,J. Juaristi Campillo,F. Julbe,L. Karbevska,Pierre Kervella,A. Kochoska,M. Kontizas,Andreas Korn,Z. Kostrzewa-Rutkowska,Z. Kostrzewa-Rutkowska,K. Kruszyńska,Sébastien Lambert,A. F. Lanza,Y. Lasne,J. F. Le Campion,Y. Le Fustec,Y. Lebreton,T. Lebzelter,Silvio Leccia,N. Leclerc,Isabelle Lecoeur-Taïbi,S. Liao,E. Licata,H. E. P. Lindstrøm,H. E. P. Lindstrøm,T. A. Lister,E. Livanou,Alex Lobel,P. Madrero Pardo,S. Managau,Robert G. Mann,Jon Marchant,Marcella Marconi,M. M. S. Marcos Santos,S. Marinoni,S. Marinoni,Federico Marocco,Douglas J. Marshall,L. Martin Polo,J. M. Martín-Fleitas,A. Masip,Davide Massari,Alessandra Mastrobuono-Battisti,Tsevi Mazeh,Sergio Messina,Daniel Michalik,N. R. Millar,Alexey Mints,D. Molina,Roberto Molinaro,László Molnár,László Molnár,Paolo Montegriffo,R. Mor,Roberto Morbidelli,Thierry Morel,Derek W. Morris,A. F. Mulone,D. Munoz,Tatiana Muraveva,C. P. Murphy,Ilaria Musella,L. Noval,C. Ordénovic,G. Orrù,J. Osinde,C. Pagani,Isabella Pagano,L. Palaversa,P. A. Palicio,A. Panahi,Michał Pawlak,Michał Pawlak,X. Peñalosa Esteller,Antti Penttilä,A. M. Piersimoni,F. X. Pineau,Emese Plachy,Emese Plachy,G. Plum,E. Poggio,Ennio Poretti,E. Poujoulet,Andrej Prsa,L. Pulone,E. Racero,E. Racero,S. Ragaini,Monica Rainer,C. M. Raiteri,Nicolas Rambaux,M. Ramos-Lerate,P. Re Fiorentin,S. Regibo,Céline Reylé,Vincenzo Ripepi,Alberto Riva,Guy Rixon,N. Robichon,C. Robin,Maroussia Roelens,L. Rohrbasser,Nicholas Rowell,F. Royer,Krzysztof A. Rybicki,G. Sadowski,A. Sagristà Sellés,Johannes Sahlmann,Jesus Salgado,E. Salguero,N. Samaras,V. Sanchez Gimenez,Nicoletta Sanna,R. Santoveña,M. Sarasso,Mathias Schultheis,Eva Sciacca,M. Segol,J. C. Segovia,Damien Ségransan,D. Semeux,H. I. Siddiqui,Arnaud Siebert,Arnaud Siebert,L. Siltala,Eric Slezak,R. L. Smart,Enrique Solano,F. Solitro,D. Souami,J. Souchay,Alessandro Spagna,Federica Spoto,Iain A. Steele,H. Steidelmüller,C. A. Stephenson,Maria Süveges,Maria Süveges,Maria Süveges,Laszlo Szabados,E. Szegedi-Elek,F. Taris,G. Tauran,Mark Taylor,Ramachrisna Teixeira,William Thuillot,N. Tonello,F. Torra,J. Torra,C. Turon,N. Unger,M. Vaillant,E. van Dillen,O. Vanel,Alberto Vecchiato,Y. Viala,D. Vicente,S. Voutsinas,M. Weiler,Thomas Wevers,Łukasz Wyrzykowski,A. Yoldas,P. Yvard,H. Zhao,Juan Zorec,Shay Zucker,C. Zurbach,Tomaz Zwitter +453 more
TL;DR: In this paper, the authors used the data from the Gaia Early Data Release 3 (EDR3) to select different populations and components and to calculate the distances and velocities in the direction of the anticentre.
Journal ArticleDOI
The fall of the Northern Unicorn: tangential motions in the Galactic anticentre with SDSS and Gaia
TL;DR: In this article, a detailed study of the stellar proper motion across the entire Galactic Anti-centre area visible in the Sloan Digital Sky Survey data is presented. But the work is limited to the main sequence stars at the distance of the Monoceros Ring.
Journal ArticleDOI
Orbital tori for non-axisymmetric galaxies
TL;DR: In this article, the TorusModeller library is used to compute the velocity structure of the solar neighborhood for bars of different pattern speeds and a simple action-based distribution function, which can be applied to any nonaxisymmetric potential that is stationary in a rotating from - hence also to classical spiral structure.
Journal ArticleDOI
Disk stars in the Milky Way detected beyond 25 kpc from its center
Martin Lopez-Corredoira,Martin Lopez-Corredoira,C. Allende Prieto,C. Allende Prieto,F. Garzón,F. Garzón,H. Wang,Chao Liu,Licai Deng +8 more
TL;DR: In this paper, the maximum distance at which the metallicity distribution of stars in the Galactic plane is distinct from that of the halo populations is derived from the LAMOST and SDSS-APOGEE spectroscopic surveys.
References
More filters
Book
Mathematical Methods of Classical Mechanics
TL;DR: In this paper, Newtonian mechanics: experimental facts investigation of the equations of motion, variational principles Lagrangian mechanics on manifolds oscillations rigid bodies, differential forms symplectic manifolds canonical formalism introduction to pertubation theory.
Journal ArticleDOI
The Sloan Digital Sky Survey: Technical Summary
TL;DR: The Sloan Digital Sky Survey (SDSS) as mentioned in this paper provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the Universe: a photometrically and astrometrically calibrated digital imaging survey of pi steradians above about Galactic latitude 30 degrees in five broad optical bands.
Journal ArticleDOI
The Sloan Digital Sky Survey: Technical summary
Donald G. York,Jennifer Adelman,John E. Anderson,Scott F. Anderson,James Annis,Neta A. Bahcall,J. A. Bakken,Robert H. Barkhouser,Steven Bastian,E. Berman,William N. Boroski,Steve Bracker,Charlie Briegel,John W. Briggs,Jon Brinkmann,Robert J. Brunner,Scott Burles,Larry N. Carey,Michael A. Carr,Francisco J. Castander,Francisco J. Castander,Bing Chen,Patrick L. Colestock,Andrew J. Connolly,James H. Crocker,István Csabai,István Csabai,Paul C. Czarapata,John Eric Davis,Mamoru Doi,Tom Dombeck,Daniel J. Eisenstein,Nancy Ellman,Brian R. Elms,Brian R. Elms,Michael L. Evans,Xiaohui Fan,Glenn R. Federwitz,Larry Fiscelli,Scott D. Friedman,Joshua A. Frieman,Joshua A. Frieman,Masataka Fukugita,Bruce Gillespie,James E. Gunn,Vijay K. Gurbani,Ernst De Haas,M. Haldeman,Frederick H. Harris,Jeffrey J. E. Hayes,Timothy M. Heckman,Gregory S. Hennessy,Robert B. Hindsley,S. Holm,Donald J. Holmgren,Chi Hao Huang,Charles L. Hull,Don Husby,Shin-Ichi Ichikawa,Takashi Ichikawa,Zěljko Ivezić,Stephen M. Kent,Rita S. J. Kim,E. Kinney,Mark A. Klaene,A. N. Kleinman,Scot Kleinman,Gillian R. Knapp,John Korienek,Richard G. Kron,Richard G. Kron,Peter Z. Kunszt,D. Q. Lamb,Brian C. Lee,R. French Leger,Siriluk Limmongkol,Carl Lindenmeyer,Dan Long,Craig Loomis,Jon Loveday,Rich Lucinio,Robert H. Lupton,Bryan Mackinnon,Bryan Mackinnon,Edward J. Mannery,Paul M. Mantsch,Bruce Margon,Peregrine M. McGehee,Timothy A. McKay,Avery Meiksin,Aronne Merelli,David G. Monet,Jeffrey A. Munn,Vijay K. Narayanan,Thomas Nash,Eric H. Neilsen,Rich Neswold,Heidi Jo Newberg,Heidi Jo Newberg,Robert C. Nichol,T. Nicinski,T. Nicinski,Mario Nonino,Norio Okada,Sadanori Okamura,Jeremiah P. Ostriker,Russell Owen,A. George Pauls,John Peoples,R. Peterson,Don Petravick,Jeffrey R. Pier,Adrian Pope,Ruth Pordes,Angela Prosapio,R. Rechenmacher,Thomas R. Quinn,Gordon T. Richards,Michael Richmond,Claudio H. Rivetta,Constance M. Rockosi,Kurt Ruthmansdorfer,Dale Sandford,David J. Schlegel,Donald P. Schneider,Maki Sekiguchi,G. Sergey,Kazuhiro Shimasaku,Walter A. Siegmund,Stephen A. Smee,J. Allyn Smith,S. A. Snedden,Robert Stone,Chris Stoughton,Michael A. Strauss,Christopher W. Stubbs,Mark SubbaRao,Alexander S. Szalay,István Szapudi,Gyula P. Szokoly,Anirudda R. Thakar,Christy Tremonti,Douglas L. Tucker,Alan Uomoto,Daniel E. Vanden Berk,Michael S. Vogeley,Patrick Waddell,Shu I. Wang,Masaru Watanabe,David H. Weinberg,Brian Yanny,Naoki Yasuda +151 more
TL;DR: The Sloan Digital Sky Survey (SDSS) as discussed by the authors provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the universe: a photometrically and astrometrically calibrated digital imaging survey of π sr above about Galactic latitude 30° in five broad optical bands to a depth of g' ~ 23 mag.
Journal ArticleDOI
Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
A. G. A. Brown,Antonella Vallenari,T. Prusti,J. H. J. de Bruijne,Francois Mignard,R. Drimmel +5 more
TL;DR: The first Gaia data release, Gaia DR1 as mentioned in this paper, consists of the positions, parallaxes, and mean proper motions for about 2 million of the brightest stars in common with the Hipparcos and Tycho-2 catalogues.