EPJ Web of Conferences
Volume 19, 2012Assembling the Puzzle of the Milky Way
|Number of page(s)||5|
|Section||Inner Galaxy: Bulge/Bar/Inner Disc Interplay, Role of Mergers|
|Published online||07 February 2012|
The chemical evolution of the Galactic Bulge seen through micro-lensing events
1 Lund Observatory, Box 43, 221 00 Lund, Sweden
2 Universidade de São Paulo, IAG, Rua do Matão 1226, Cidade Universitária, São Paulo 05508-900, Brazil
3 Research School of Astronomy and Astrophysics, Australian National University, Cotter Rd., Weston, ACT 2611, Australia
4 Department of Astronomy, Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210, USA
5 Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padua, Italy
6 Benoziyo Center for Astrophysics, Faculty of Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
a e-mail: firstname.lastname@example.org
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.
© Owned by the authors, published by EDP Sciences, 2012
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