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The Puzzling Frequencies of CEMP and NEMP Stars

Published online by Cambridge University Press:  05 March 2013

O. R. Pols ,
R. G. Izzard ,
E. Glebbeek  and
R. J. Stancliffe
O. R. Pols*
Affiliation:
Sterrekundig Instituut Utrecht, P.O. Box 80 000, NL-3584 TA Utrecht, The Netherlands
R. G. Izzard
Affiliation:
Sterrekundig Instituut Utrecht, P.O. Box 80 000, NL-3584 TA Utrecht, The Netherlands Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, CP226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium
E. Glebbeek
Affiliation:
Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
R. J. Stancliffe
Affiliation:
Centre for Stellar and Planetary Astrophysics, Monash University, P.O. Box 28M, Clayton, VIC 3800, Australia
*
ECorresponding author. Email: o.r.pols@uu.nl
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Abstract

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We present the results of binary population simulations of carbon- and nitrogen-enhanced metal-poor (CEMP and NEMP) stars. We show that the observed paucity of very nitrogen-rich stars puts strong constraints on possible modifications of the initial mass function at low metallicity.

Keywords

stars: AGB and post-AGBstars: abundancesstars: binariesstars : evolutionstars: mass function
Type
CEMP Stars
Information
Publications of the Astronomical Society of Australia , Volume 26 , Issue 3 , 2009 , pp. 327 - 329
Copyright
Copyright © Astronomical Society of Australia 2009

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