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Stellar evolution models at the Magellanic Cloud metallicities

Published online by Cambridge University Press:  01 July 2008

Raphael Hirschi ,
Sylvia Ekström ,
Cyril Georgy ,
Georges Meynet  and
André Maeder
Raphael Hirschi
Affiliation:
Astrophysics group, Keele University, Lennard-Jones Lab., Keele, ST5 5BG, UK email: r.hirschi@epsam.keele.ac.uk IPMU, University of Tokyo, Kashiwa, Chiba 277-8582, Japan
Sylvia Ekström
Affiliation:
Observatoire Astronomique de l'Université de Genève, CH-1290, Sauverny, Switzerland
Cyril Georgy
Affiliation:
Observatoire Astronomique de l'Université de Genève, CH-1290, Sauverny, Switzerland
Georges Meynet
Affiliation:
Observatoire Astronomique de l'Université de Genève, CH-1290, Sauverny, Switzerland
André Maeder
Affiliation:
Observatoire Astronomique de l'Université de Genève, CH-1290, Sauverny, Switzerland
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Abstract

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The Magellanic Clouds are great laboratories to study the evolution of stars at two metallicities lower than solar. They provide excellent testbeds for stellar evolution theory and in particular for the impact of metallicity on stellar evolution. It is important to test stellar evolution models at metallicities lower than solar in order to use the models to predict the evolution and properties of the first stars. In these proceedings, after recalling the effects of metallicity, we present stellar evolution models including the effects of rotation at the Magellanic Clouds metallicities. We then compare the models to various observations (ratios of sub-groups of massive stars and supernovae, nitrogen surface enrichment and gamma-ray bursts) and show that the models including the effects of rotation reproduce most of the observational constraints.

Keywords

stars: mass lossstars: rotationsupernovae: generalstars: Wolf-Rayetgalaxies: evolutionMagellanic Cloudsgamma rays: bursts
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S256: The Magellanic System: Stars, Gas, and Galaxies , July 2008 , pp. 337 - 342
Copyright
Copyright © International Astronomical Union 2009

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