CONSTRAINTS ON THIN AND THICK DISC FORMATION FROM NEW ANALYSIS OF 2MASS AND SDSS SURVEYS
| Affiliation auteurs | !!!! Error affiliation !!!! |
| Titre | CONSTRAINTS ON THIN AND THICK DISC FORMATION FROM NEW ANALYSIS OF 2MASS AND SDSS SURVEYS |
| Type de publication | Conference Paper |
| Year of Publication | 2015 |
| Auteurs | Robin A.C, Reyle C., Amores E.B, Martins A.MM |
| Editor | Walton NA, Figueras F, BalaguerNunez L, Soubiran C |
| Conference Name | MILKY WAY UNRAVELLED BY GAIA: GREAT SCIENCE FROM THE GAIA DATA RELEASES |
| Publisher | European Union's Seventh Framework Programme; Minist Econ y Competitividad, Fundacion Espanola Ciencia Tecnologia; MINECO FEDER; Univ Barcelona, Fac Phys; Univ Barcelona, Inst Cosmos; Inst Estudis Espacials Catalunya |
| Conference Location | 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE |
| ISBN Number | 978-2-7598-1826-6 |
| Résumé | Two new analysis of SDSS and 2MASS surveys are used to constrain the characteristics of the thin and thick disc of the Milky Way, based on a population synthesis model and a MCMC scheme to constrain model parameters. These studies show that 1) the thick disc has been formed during an extended period of time and it was contracting during this phase; 2) the external thin disc is shown to have characteristics which vary with age such as the scale length, warp orientation, warp and flare slopes. The thick disc undergoing a contraction with time while the thin disc forming inside-out clearly indicate that they are truly distinct components of the Galaxy. |
| DOI | 10.1051/eas/1567036 |