Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..315..209f&link_type=abstract
How Does the Galaxy Work? A Galactic Tertulia with Don Cox and Ron Reynolds. Edited by Emilio J. Alfaro, Instituto de Astrofica
Astronomy and Astrophysics
Astrophysics
Scientific paper
In order to probe the formation history of the Galactic bulge, we compare the metal abundances of K giant bulge stars with a large number of star formation histories which are generated by a model of chemical enrichment. A Kolmogorov-Smirnov test rules out infall timescales longer than 1 Gyr at the 90 per cent confidence level, with preferred values being shorter than ˜ 0.5 Gyr. This result favours bulge formation scenarios based on a single massive burst, as opposed to the weaker and more extended star formation histories predicted by stellar accretion and merger-induced bursts. Accurate estimates of [Mg/Fe] over a large sample of bulge giants will unambiguously constrain both the infall as well as the star formation timescales.
Ferreras Ignacio
Silk Joseph
~Wyse Rosemary F. G.
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