The chemical evolution of the Galactic Bulge seen through micro-lensing events

被引：0
|
作者：
Feltzing, S. [1 ]
Bensby, T. [1 ]
Melendez, J.
Aden, D. [1 ]
Asplund, M.
Gould, A.
Johnson, J.
Lucatello, S.
Gal-Yam, A.
机构：
[1] Lund Observ, Box 43, S-22100 Lund, Sweden
来源：
ASSEMBLING THE PUZZLE OF THE MILKY WAY | 2012年 / 19卷
关键词：
METALLICITY DISTRIBUTION; STARS; ABUNDANCES; GIANTS; DWARF; AGE; DISK;
D O I：
10.1051/epjconf/20121906002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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 moderately high signal-to-noise ratios of dwarf stars in the Galactic bulge. Normally this is not feasible for the faint turn-off stars in the Galactic bulge, but micro-lensing offers this possibility. Elemental abundance trends in the Galactic bulge as traced by dwarf stars are very similar to those seen for dwarf stars in the solar neighbourhood. We discuss the implications of the ages and metallicity distribution function derived for the micro-lensed dwarf stars in the Galactic bulge.
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页数：5
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