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- Title
CONSTRAINTS ON THIN AND THICK DISC FORMATION FROM NEW ANALYSIS OF 2MASS AND SDSS SURVEYS.
- Authors
Robin, A. C.; Reylé, C.; Amôres, E. B.; Martins, A. M. M.
- Abstract
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.
- Subjects
DISK galaxies; GALAXY formation; TWO Micron All Sky Survey; SLOAN Digital Sky Survey; ASTRONOMICAL surveys; MILKY Way
- Publication
EAS Publications Series, 2014, Vol 67/68, p199
- ISSN
1633-4760
- Publication type
Article
- DOI
10.1051/eas/1567036