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The Effect of Massive Binaries on Stellar Populations and Supernova Progenitors

Published online by Cambridge University Press:  01 December 2007

John J. Eldridge ,
Robert G. Izzard  and
Christopher A. Tout
John J. Eldridge
Affiliation:
University of Cambridge, Institute of Astronomy, The Observatories, Madingley Road, Cambridge CB3 0HA, UK e-mail (J.J. Eldridge): jje@ast.cam.ac.uk
Robert G. Izzard
Affiliation:
Sterrekundig Instituut Utrecht, Postbus 80000, 3508 TA Utrecht, The Netherlands
Christopher A. Tout
Affiliation:
University of Cambridge, Institute of Astronomy, The Observatories, Madingley Road, Cambridge CB3 0HA, UK e-mail (J.J. Eldridge): jje@ast.cam.ac.uk
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Abstract

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We have calculated a large set of detailed binary models and used them to test the observed stellar population ratios that compare the relative populations of blue supergiants, red supergiants and Wolf-Rayet stars at different metallicities. We have also used our models to estimate the relative rate of type Ib/c to type II supernovae. We find, with an interacting binary fraction of about two thirds, that we obtain better agreement between our models and observations than with single stars. We discuss the use of models in determining the nature of supernova progenitors and show the surprising result that many type Ib/c supernova progenitors are less luminous and less massive in our models than the observed population of Wolf-Rayet stars.

Keywords

binaries: close – stars: evolution – supernovae: general – stars: Wolf-Rayet
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S250: Massive Stars as Cosmic Engines , December 2007 , pp. 179 - 184
Copyright
Copyright © International Astronomical Union 2008

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