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Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VIII. Carbon and oxygen
T. Bensby, A. Gould, M. Asplund +6
CONTEXT: [ABRIDGED]. For the Milky Way bulge, there are currently essentially no measurements of carbon in un-evolved stars, hampering our abilities to properly compare Galactic ch…
Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. VII. Lithium
T. Bensby, S. Feltzing, J. C. Yee +5
Lithium abundances are presented for 91 dwarf and subgiant stars in the Galactic bulge. The analysis is based on line synthesis of the 7Li line at 6707 Å in high-resolution spectra…
The age and abundance structure of the stellar populations in the central sub-kpc of the Milky Way
T. Bensby, S. Feltzing, A. Gould +6
The four main findings about the age and abundance structure of the Milky Way bulge based on microlensed dwarf and subgiant stars are: (1) a wide metallicity distribution with dist…
Asymmetric streaming motion in the Galactic bulge X-shaped structure revealed by the OGLE-III proper motions
R. Poleski, A. Udalski, A. Gould +6
The Galactic bulge shows a double red clump in sight lines with |b| > 5 deg and -3 deg < l < 4 deg. It is interpreted as a signature of an X-shaped structure seen almost edge-on. W…
Signatures of an intermediate-age metal-rich bulge population
T. Bensby, S. Feltzing, A. Gould +8
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 metallicit…
The chemical evolution of the Galactic Bulge seen through micro-lensing events
Sofia Feltzing, Thomas Bensby, Jorge Meléndez +6
Galactic bulges are central to understanding galaxy formation and evolution. Here we report on recent studies using micro-lensing events to obtain spectra of high resolution and mo…