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Observed Abundance Features and their Implications for Chemical Evolution

Published online by Cambridge University Press:  05 March 2013

Takuji Tsujimoto  and
Toshikazu Shigeyama
Takuji Tsujimoto*
Affiliation:
National Astronomical Observatory, 2-21-1 Osawa, Mitaka-shi, Tokyo 181-8588, Japan
Toshikazu Shigeyama
Affiliation:
Research Center for the Early Universe, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
*
3E-mail: taku.tsujimoto@nao.ac.jp
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Abstract

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We describe the star formation histories of the Milky Way dwarf spheroidal galaxy and the globular cluster ω Centauri in terms of an inhomogeneous chemical evolution model developed for the Galactic halo. The observed abundance trends seen in neutron-capture elements together with α-elements constrain our models to shed light on the histories of these nearby galaxies and ω Cen. The origin of low-α stars and a new picture of the globular cluster formation scenario induced by cloud–cloud collisions are also presented.

Keywords

globular clusters: generalglobular clusters: individual (ω Centauri)stars: abundancesgalaxies: dwarfplanetary systems
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Issue 2: The Fifth Workshop on Galactic Chemodynamics , 2004 , pp. 242 - 247
Copyright
Copyright © Astronomical Society of Australia 2004

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