On the age of field halo stars

P. Jofre (1)

1 SSE 2012

A study of stellar ages for a sample from the Sloan Digital Sky Survey (SDSS) is presented. The results are consolidated with a set of globular clusters (GCs) and show that this stellar sample is composed by one dominant population of 10-12 Gyr. This supports the Eggen's scenario, which claims that the inner halo of the Milky Way formed rapidly, probably during the collapse of the proto-Galactic cloud.

Domaines: Planétologie et astrophysique de la terre [astro-ph.EP]; Planétologie et astrophysique de la terre [astro-ph.EP]

P. Jofre. On the age of field halo stars. Assembling the Puzzle of the Milky Way,, 2011, Le Grand-Bornand, France. pp.02006, ⟨10.1051/EPJCONF/20121902006⟩. ⟨hal-00670017⟩