Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008newa...13..340n&link_type=abstract
New Astronomy, Volume 13, Issue 5, p. 340-347.
Astronomy and Astrophysics
Astronomy
1
98.62.Bj, 98.56.Ne, 98.62.Gq, 98.56.-P
Scientific paper
The chemical evolution of the halo of the M33 (Triangle) galaxy is considered. We suppose a galactic stellar halo to be formed as separate fragments which then merge. Our results show that the M33 halo metallicity distribution function can be reproduced in the framework of such a merger scenario of the chemical evolution. The halo stellar population of M33 was likely formed from two fragments only. It was found that gas accretion plays a significant role during the evolution of fragments before their merger. The presence of gas accretion during the fragment evolution allows us to obtain a gas mass fraction which is sufficient for the disk formation after the merger of the fragments.
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