Signatures of an intermediate-age metal-rich bulge population

arxiv: 1201.2013 · v1 · pith:PEN7U4PCnew · submitted 2012-01-10 · 🌌 astro-ph.GA

Signatures of an intermediate-age metal-rich bulge population

T. Bensby , S. Feltzing , A. Gould , J. A. Johnson , M. Asplund , D. Ad\'en , J. Mel\'endez , J. G. Cohen

show 3 more authors

I. Thompson S. Lucatello A. Gal-Yam

This is my paper

classification 🌌 astro-ph.GA

keywords starsbulgemetal-richabundancesagesstellaralpha-elementaround

0 comments p. Extension

pith:PEN7U4PC Add to your LaTeX paper

What is a Pith Number?

\usepackage{pith}
\pithnumber{PEN7U4PC}

Prints a linked pith:PEN7U4PC badge after your title and writes the identifier into PDF metadata. Compiles on arXiv with no extra files. Learn more

read the original abstract

We have determined detailed elemental abundances and stellar ages for a sample of now 38 microlensed dwarf and subgiant stars in the Galactic bulge. Stars with sub-solar metallicities are all old and have enhanced alpha-element abundances -- very similar to what is seen for local thick disk stars. The metal-rich stars on the other hand show a wide variety of stellar ages, ranging from 3-4 Gyr to 12 Gyr, and an average around 7-8 Gyr. The existence of young and metal-rich stars are in conflict with recent photometric studies of the bulge which claim that the bulge only contains old stars.

This paper has not been read by Pith yet.

Signatures of an intermediate-age metal-rich bulge population

discussion (0)