Gaia Data Release 3: Mapping the asymmetric disc of the Milky Way
Abstract
With the most recent Gaia data release the number of sources with complete 6D phase space information (position and velocity) has increased to well over 33 million stars, while stellar astrophysical parameters are provided for more than 470 million sources, in addition to the identification of over 11 million variable stars. Using the astrophysical parameters and variability classifications provided in Gaia DR3, we select various stellar populations to explore and identify non-axisymmetric features in the disc of the Milky Way in both configuration and velocity space. Using more about 580 thousand sources identified as hot OB stars, together with 988 known open clusters younger than 100 million years, we map the spiral structure associated with star formation 4-5 kpc from the Sun. We select over 2800 Classical Cepheids younger than 200 million years, which show spiral features extending as far as 10 kpc from the Sun in the outer disc. We also identify more than 8.7 million sources on the red giant branch (RGB), of which 5.7 million have line-of-sight velocities, allowing the velocity field of the Milky Way to be mapped as far as 8 kpc from the Sun, including the inner disc. The spiral structure revealed by the young populations is consistent with recent results using Gaia EDR3 astrometry and source lists based on near infrared photometry, showing the Local (Orion) arm to be at least 8 kpc long, and an outer arm consistent with what is seen in HI surveys, which seems to be a continuation of the Perseus arm into the third quadrant. Meanwhile, the subset of RGB stars with velocities clearly reveals the large scale kinematic signature of the bar in the inner disc, as well as evidence of streaming motions in the outer disc that might be associated with spiral arms or bar resonances. (abridged)
Keywords
Cite
@article{arxiv.2206.06207,
title = {Gaia Data Release 3: Mapping the asymmetric disc of the Milky Way},
author = {Gaia Collaboration and R. Drimmel and M. Romero-Gomez and L. Chemin and P. Ramos and E. Poggio and V. Ripepi and R. Andrae and R. Blomme and T. Cantat-Gaudin and A. Castro-Ginard and G. Clementini and F. Figueras and M. Fouesneau and Y. Fremat and K. Jardine and S. Khanna and A. Lobel and D. J. Marshall and T. Muraveva and A. G. A. Brown and A. Vallenari and T. Prusti and J. H. J. de Bruijne and F. Arenou and C. Babusiaux and M. Biermann and O. L. Creevey and C. Ducourant and D. W. Evans and L. Eyer and R. Guerra and A. Hutton and C. Jordi and S. A. Klioner and U. L. Lammers and L. Lindegren and X. Luri and F. Mignard and C. Panem and D. Pourbaix and S. Randich and P. Sartoretti and C. Soubiran and P. Tanga and N. A. Walton and C. A. L. Bailer-Jones and U. Bastian and F. Jansen and D. Katz and M. G. Lattanzi and F. van Leeuwen and J. Bakker and C. Cacciari and J. Castañeda and F. De Angeli and C. Fabricius and L. Galluccio and A. Guerrier and U. Heiter and E. Masana and R. Messineo and N. Mowlavi and C. Nicolas and K. Nienartowicz and F. Pailler and P. Panuzzo and F. Riclet and W. Roux and G. M. Seabroke and R. Sordoørcit and F. Thévenin and G. Gracia-Abril and J. Portell and D. Teyssier and M. Altmann and M. Audard and I. Bellas-Velidis and K. Benson and J. Berthier and P. W. Burgess and D. Busonero and G. Busso and H. Cánovas and B. Carry and A. Cellino and N. Cheek and Y. Damerdji and M. Davidson and P. de Teodoro and M. Nuñez Campos and L. Delchambre and A. Dell'Oro and P. Esquej and J. Fernández-Hernández and E. Fraile and D. Garabato and P. García-Lario and E. Gosset and R. Haigron and J. -L. Halbwachs and N. C. Hambly and D. L. Harrison and J. Hernández and D. Hestroffer and S. T. Hodgkin and B. Holl and K. Janßen and G. Jevardat de Fombelle and S. Jordan and A. Krone-Martins and A. C. Lanzafame and W. Löffler and O. Marchal and P. M. Marrese and A. Moitinho and K. Muinonen and P. Osborne and E. Pancino and T. Pauwels and A. Recio-Blanco and C. Reylé and M. Riello and L. Rimoldini and T. Roegiers and J. Rybizki and L. M. Sarro and C. Siopis and M. Smith and A. Sozzetti and E. Utrilla and M. van Leeuwen and U. Abbas and P. Ábrahám and A. Abreu Aramburu and C. Aerts and J. J. Aguado and M. Ajaj and F. Aldea-Montero and G. Altavilla and M. A. Álvarez and J. Alves and F. Anders and R. I. Anderson and E. Anglada Varela and T. Antoja and D. Baines and S. G. Baker and L. Balaguer-Núñez and E. Balbinot and Z. Balog and C. Barache and D. Barbato and M. Barros and M. A. Barstow and S. Bartolomé and J. -L. Bassilana and N. Bauchet and U. Becciani and M. Bellazzini and A. Berihuete and M. Bernet and S. Bertone and L. Bianchi and A. Binnenfeld and S. Blanco-Cuaresma and A. Blazere and T. Boch and A. Bombrun and D. Bossini and S. Bouquillon and A. Bragaglia and L. Bramante and E. Breedt and A. Bressan and N. Brouillet and E. Brugaletta and B. Bucciarelli and A. Burlacu and A. G. Butkevich and R. Buzzi and E. Caffau and R. Cancelliere and R. Carballo and T. Carlucci and M. I. Carnerero and J. M. Carrasco and L. Casamiquela and M. Castellani and L. Chaoul and P. Charlot and V. Chiaramida and A. Chiavassa and N. Chornay and G. Comoretto and G. Contursi and W. J. Cooper and T. Cornez and S. Cowell and F. Crifo and M. Cropper and M. Crosta and C. Crowley and C. Dafonte and A. Dapergolas and M. David and P. David and P. de Laverny and F. De Luise and R. De March and J. De Ridder and R. de Souza and A. de Torres and E. F. del Peloso and E. del Pozo and M. Delbo and A. Delgado and J. -B. Delisle and C. Demouchy and T. E. Dharmawardena and P. Di Matteo and S. Diakite and C. Diener and E. Distefano and C. Dolding and B. Edvardsson and H. Enke and C. Fabre and M. Fabrizio and S. Faigler and G. Fedorets and P. Fernique and A. Fienga and Y. Fournier and C. Fouron and F. Fragkoudi and M. Gai and A. Garcia-Gutierrez and M. Garcia-Reinaldos and M. García-Torres and A. Garofalo and A. Gavel and P. Gavras and E. Gerlach and R. Geyer and P. Giacobbe and G. Gilmore and S. Girona and G. Giuffrida and R. Gomel and A. Gomez and J. González-Núñez and I. González-Santamaría and J. J. González-Vidal and M. Granvik and P. Guillout and J. Guiraud and R. Gutiérrez-Sánchez and L. P. Guy and D. Hatzidimitriou and M. Hauser and M. Haywood and A. Helmer and A. Helmi and M. H. Sarmiento and S. L. Hidalgo and T. Hilger and N. Hładczuk and D. Hobbs and G. Holland and H. E. Huckle and G. Jasniewicz and A. Jean-Antoine Piccolo and Ó. Jiménez-Arranz and A. Jorissen and J. Juaristi Campillo and F. Julbe and L. Karbevska and P. Kervella and M. Kontizas and G. Kordopatis and A. J. Korn and Á Kóspál and Z. Kostrzewa-Rutkowska and K. Kruszyńska and M. Kun and P. Laizeau and S. Lambert and A. F. Lanza and Y. Lasne and J. -F. Le Campion and Y. Lebreton and T. Lebzelter and S. Leccia and N. Leclerc and I. Lecoeur-Taibi and S. Liao and E. L. Licata and H. E. P. Lindstrøm and T. A. Lister and E. Livanou and A. Lorca and C. Loup and P. Madrero Pardo and A. Magdaleno Romeo and S. Managau and R. G. Mann and M. Manteiga and J. M. Marchant and M. Marconi and J. Marcos and M. M. S. Marcos Santos and D. Marín Pina and S. Marinoni and F. Marocco and L. Martin Polo and J. M. Martín-Fleitas and G. Marton and N. Mary and A. Masip and D. Massari and A. Mastrobuono-Battisti and T. Mazeh and P. J. McMillan and S. Messina and D. Michalik and N. R. Millar and A. Mints and D. Molina and R. Molinaro and L. Molnár and G. Monari and M. Monguió and P. Montegriffo and A. Montero and R. Mor and A. Mora and R. Morbidelli and T. Morel and D. Morris and C. P. Murphy and I. Musella and Z. Nagy and L. Noval and F. Ocaña and A. Ogden and C. Ordenovic and J. O. Osinde and C. Pagani and I. Pagano and L. Palaversa and P. A. Palicio and L. Pallas-Quintela and A. Panahi and S. Payne-Wardenaar and X. Peñalosa Esteller and A. Penttilä and B. Pichon and A. M. Piersimoni and F. -X. Pineau and E. Plachy and G. Plum and A. Prša and L. Pulone and E. Racero and S. Ragaini and M. Rainer and C. M. Raiteri and N. Rambaux and M. Ramos-Lerate and P. Re Fiorentin and S. Regibo and P. J. Richards and C. Rios Diaz and A. Riva and H. -W. Rix and G. Rixon and N. Robichon and A. C. Robin and C. Robin and M. Roelens and H. R. O. Rogues and L. Rohrbasser and N. Rowell and F. Royer and D. Ruz Mieres and K. A. Rybicki and G. Sadowski and A. Sáez Núñez and A. Sagristà Sellés and J. Sahlmann and E. Salguero and N. Samaras and V. Sanchez Gimenez and N. Sanna and R. Santoveña and M. Sarasso and M. Schultheis and E. Sciacca and M. Segol and J. C. Segovia and D. Ségransan and D. Semeux and S. Shahaf and H. I. Siddiqui and A. Siebert and L. Siltala and A. Silvelo and E. Slezak and I. Slezak and R. L. Smart and O. N. Snaith and E. Solano and F. Solitro and D. Souami and J. Souchay and A. Spagna and L. Spina and F. Spoto and I. A. Steele and H. Steidelmüller and C. A. Stephenson and M. Süveges and J. Surdej and L. Szabados and E. Szegedi-Elek and F. Taris and M. B. Taylo and R. Teixeira and L. Tolomei and N. Tonello and F. Torra and J. Torra and G. Torralba Elipe and M. Trabucchi and A. T. Tsounis and C. Turon and A. Ulla and N. Unger and M. V. Vaillant and E. van Dillen and W. van Reeven and O. Vanel and A. Vecchiato and Y. Viala and D. Vicente and S. Voutsinas and M. Weiler and T. Wevers and L. Wyrzykowski and A. Yoldas and P. Yvard and H. Zhao and J. Zorec and S. Zucker and T. Zwitter},
journal= {arXiv preprint arXiv:2206.06207},
year = {2023}
}
Comments
35 pages, 27 figures, accepted for publication in A&A special Gaia DR3 issue. V2: abstract completed. V3: complete author list and link to data: https://drive.google.com/drive/u/1/folders/1yOJPjYmM7QK5XVsqaiSOTuwDQNti2LlZ