Gaia Early Data Release 3: Structure and properties of the Magellanic Clouds
Astrophysics of Galaxies
2021-04-28 v4
Abstract
We compare the Gaia DR2 and Gaia EDR3 performances in the study of the Magellanic Clouds and show the clear improvements in precision and accuracy in the new release. We also show that the systematics still present in the data make the determination of the 3D geometry of the LMC a difficult endeavour; this is at the very limit of the usefulness of the Gaia EDR3 astrometry, but it may become feasible with the use of additional external data. We derive radial and tangential velocity maps and global profiles for the LMC for the several subsamples we defined. To our knowledge, this is the first time that the two planar components of the ordered and random motions are derived for multiple stellar evolutionary phases in a galactic disc outside the Milky Way, showing the differences between younger and older phases. We also analyse the spatial structure and motions in the central region, the bar, and the disc, providing new insights into features and kinematics. Finally, we show that the Gaia EDR3 data allows clearly resolving the Magellanic Bridge, and we trace the density and velocity flow of the stars from the SMC towards the LMC not only globally, but also separately for young and evolved populations. This allows us to confirm an evolved population in the Bridge that is slightly shift from the younger population. Additionally, we were able to study the outskirts of both Magellanic Clouds, in which we detected some well-known features and indications of new ones.
Cite
@article{arxiv.2012.01771,
title = {Gaia Early Data Release 3: Structure and properties of the Magellanic Clouds},
author = {Gaia Collaboration and X. Luri and L. Chemin and G. Clementini and H. E. Delgado and P. J. McMillan and M. Romero-Gómez and E. Balbinot and A. Castro-Ginard and R. Mor and V. Ripepi and L. M. Sarro and M. -R. L. Cioni and C. Fabricius and A. Garofalo and A. Helmi and T. Muraveva and A. G. A. Brown and A. Vallenari and T. Prusti and J. H. J. de and C. Babusiaux and M. Biermann and O. L. Creevey and D. W. Evans and L. Eyer and A. Hutton and F. Jansen and C. Jordi and S. A. Klioner and U. Lammers and L. Lindegren and F. Mignard and C. Panem and D. Pourbaix and S. Randich and P. Sartoretti and C. Soubiran and N. A. Walton and F. Arenou and C. A. L. Bailer-Jones and U. Bastian and M. Cropper and R. Drimmel and D. Katz and M. G. Lattanzi and F. van Leeuwen and J. Bakker and J. Castañeda and F. De and C. Ducourant and M. Fouesneau and Y. Frémat and R. Guerra and A. Guerrier and J. Guiraud and A. Jean-Antoine 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. Sordo and P. Tanga and F. Thévenin and G. Gracia-Abril and J. Portell and D. Teyssier and M. Altmann and R. Andrae and I. Bellas-Velidis and K. Benson and J. Berthier and R. Blomme and E. Brugaletta and P. W. Burgess and G. Busso and B. Carry and A. Cellino and N. Cheek and Y. Damerdji and M. Davidson and L. Delchambre and A. Dell'Oro and J. Fernández-Hernández and L. Galluccio and P. García-Lario and M. Garcia-Reinaldos and J. González-Núñez and E. Gosset and R. Haigron and J. -L. Halbwachs and N. C. Hambly and D. L. Harrison and D. Hatzidimitriou and U. Heiter 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 A. Lorca and M. Manteiga and O. Marchal and P. M. Marrese and A. Moitinho and A. Mora and K. Muinonen and P. Osborne and E. Pancino and T. Pauwels and A. Recio-Blanco and P. J. Richards and M. Riello and L. Rimoldini and A. C. Robin and T. Roegiers and J. Rybizki and C. Siopis and M. Smith and A. Sozzetti and A. Ulla and E. Utrilla and M. van Leeuwen and W. van Reeven and U. Abbas and A. Abreu and S. Accart and C. Aerts and J. J. Aguado and M. Ajaj and G. Altavilla and M. A. Álvarez and J. Álvarez Cid-Fuentes and J. Alves and R. I. Anderson and E. Anglada Varela and T. Antoja and M. Audard and D. Baines and S. G. Baker and L. Balaguer-Núñez 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 A. Baudesson-Stella and U. Becciani and M. Bellazzini and M. Bernet and S. Bertone and L. Bianchi and S. Blanco-Cuaresma 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 B. Bucciarelli and A. Burlacu and D. Busonero and A. G. Butkevich and R. Buzzi and E. Caffau and R. Cancelliere and H. Cánovas and T. Cantat-Gaudin and R. Carballo and T. Carlucci and M. I Carnerero and J. M. Carrasco and L. Casamiquela and M. Castellani and P. Castro Sampol and L. Chaoul and P. Charlot and A. Chiavassa and G. Comoretto and W. J. Cooper and T. Cornez and S. Cowell and F. Crifo 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 P. de Teodoro and A. de Torres and E. F. del Peloso and E. del Pozo and A. Delgado and J. -B. Delisle and P. Di Matteo and S. Diakite and C. Diener and E. Distefano and C. Dolding and D. Eappachen and H. Enke and P. Esquej and C. Fabre and M. Fabrizio and S. Faigler and G. Fedorets and P. Fernique and A. Fienga and F. Figueras and C. Fouron and F. Fragkoudi and E. Fraile and F. Franke and M. Gai and D. Garabato and A. Garcia-Gutierrez and M. García-Torres and P. Gavras and E. Gerlach and R. Geyer and P. Giacobbe and G. Gilmore and S. Girona and G. Giuffrida and A. Gomez and I. Gonzalez-Santamaria and J. J. González-Vidal and M. Granvik and R. Gutiérrez-Sánchez and L. P. Guy and M. Hauser and M. Haywood and S. L. Hidalgo and T. Hilger and N. Hładczuk and D. Hobbs and G. Holland and H. E. Huckle and G. Jasniewicz and P. G. Jonker and J. Juaristi and F. Julbe and L. Karbevska and P. Kervella and S. Khanna and A. Kochoska and M. Kontizas and G. Kordopatis and A. J. Korn and Z. Kostrzewa-Rutkowska and K. Kruszyńska and S. Lambert and A. F. Lanza and Y. Lasne and J. -F. Le Campion and Y. Le Fustec and Y. Lebreton and T. Lebzelter and S. Leccia and N. Leclerc and I. Lecoeur-Taibi and S. Liao and E. Licata and H. E. P. Lindstrøm and T. A. Lister and E. Livanou and A. Lobel and P. Madrero and S. Managau and R. G. Mann and J. M. Marchant and M. Marconi and M. M. S. Marcos and S. Marinoni and F. Marocco and D. J. Marshall and L. Martin Polo and J. M. Martín-Fleitas and A. Masip and D. Massari and A. Mastrobuono-Battisti and T. Mazeh and S. Messina and D. Michalik and N. R. Millar and A. Mints and D. Molina and R. Molinaro and L. Molnár and P. Montegriffo and R. Morbidelli and T. Morel and D. Morris and A. F. Mulone and D. Munoz and C. P. Murphy and I. Musella and L. Noval and C. Ordénovic and G. Orrù and J. Osinde and C. Pagani and I. Pagano and L. Palaversa and P. A. Palicio and A. Panahi and M. Pawlak and X. Peñalosa and A. Penttilä and A. M. Piersimoni and F. -X. Pineau and E. Plachy and G. Plum and E. Poggio and E. Poretti and E. Poujoulet and A. Prša and L. Pulone and E. Racero and S. Ragaini and M. Rainer and C. M. Raiteri and N. Rambaux and P. Ramos and M. Ramos-Lerate and P. Re and S. Regibo and C. Reylé and A. Riva and G. Rixon and N. Robichon and C. Robin and M. Roelens and L. Rohrbasser and N. Rowell and F. Royer and K. A. Rybicki and G. Sadowski and A. Sagristà and J. Sahlmann and J. Salgado and E. Salguero and N. Samaras and V. Sanchez 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 H. I. Siddiqui and A. Siebert and L. Siltala and E. Slezak and R. L. Smart and E. Solano and F. Solitro and D. Souami and J. Souchay and A. Spagna and F. Spoto and I. A. Steele and H. Steidelmüller and C. A. Stephenson and M. Süveges and L. Szabados and E. Szegedi-Elek and F. Taris and G. Tauran and M. B. Taylor and R. Teixeira and W. Thuillot and N. Tonello and F. Torra and J. Torra and C. Turon and N. Unger and M. Vaillant and E. van and O. Vanel and A. Vecchiato and Y. Viala and D. Vicente and S. Voutsinas and M. Weiler and T. Wevers and Ł. Wyrzykowski and A. Yoldas and P. Yvard and H. Zhao and J. Zorec and S. Zucker and C. Zurbach and T. Zwitter},
journal= {arXiv preprint arXiv:2012.01771},
year = {2021}
}
Comments
This paper is part of the "demonstration papers" released with Gaia EDR3: https://www.cosmos.esa.int/web/gaia/earlydr3