Hostname: page-component-54dcc4c588-br6xx Total loading time: 0 Render date: 2025-10-08T16:36:00.318Z Has data issue: false hasContentIssue false
  • English
  • Français

Modelling the evolution and nucleosynthesis of carbon-enhanced metal-poor stars

Published online by Cambridge University Press:  01 April 2008

O. R. Pols ,
R. G. Izzard ,
M. Lugaro  and
S. E. de Mink
O. R. Pols
Affiliation:
Sterrekundig Instituut Utrecht, P. O. Box 80000, NL-3584 TA Utrecht, The Netherlands email: O.R.Pols@uu.nl, R.G.Izzard@uu.nl, M.A.Lugaro@uu.nl, S.E.deMink@uu.nl
R. G. Izzard
Affiliation:
Sterrekundig Instituut Utrecht, P. O. Box 80000, NL-3584 TA Utrecht, The Netherlands email: O.R.Pols@uu.nl, R.G.Izzard@uu.nl, M.A.Lugaro@uu.nl, S.E.deMink@uu.nl
M. Lugaro
Affiliation:
Sterrekundig Instituut Utrecht, P. O. Box 80000, NL-3584 TA Utrecht, The Netherlands email: O.R.Pols@uu.nl, R.G.Izzard@uu.nl, M.A.Lugaro@uu.nl, S.E.deMink@uu.nl
S. E. de Mink
Affiliation:
Sterrekundig Instituut Utrecht, P. O. Box 80000, NL-3584 TA Utrecht, The Netherlands email: O.R.Pols@uu.nl, R.G.Izzard@uu.nl, M.A.Lugaro@uu.nl, S.E.deMink@uu.nl
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present the results of binary population simulations of carbon-enhanced metal-poor (CEMP) stars. We show that nitrogen and fluorine are useful tracers of the origin of CEMP stars, and conclude that the observed paucity of very nitrogen-rich stars puts strong constraints on possible modifications of the initial mass function at low metallicity. The large number fraction of CEMP stars may instead require much more efficient dredge-up from low-metallicity asymptotic giant branch stars.

Keywords

Stars: AGB and post-AGBstars: evolutionstars: binariesstars: abundancesstars: mass function

References

Anders, E. & Grevesse, N. 1989, Geochim. Cosmochim. Acta 53, 197CrossRefGoogle Scholar
Aoki, W., Beers, T. C., Christlieb, N., Norris, J. E., Ryan, S. G., & Tsangarides, S. 2007, ApJ 655, 492CrossRefGoogle Scholar
Bonačić Marinović, A., Izzard, R. G., Lugaro, M., & Pols, O. R. 2007, A&A 469, 1013Google Scholar
Bondi, H., & Hoyle, F. 1944, MNRAS 104, 273CrossRefGoogle Scholar
Duquennoy, A., & Mayor, M. 1991, A&A 248, 485Google Scholar
Frebel, A., Christlieb, N., Norris, J. E., et al. 2006, ApJ 652, 1585CrossRefGoogle Scholar
Goswami, A. 2005, MNRAS 359, 531CrossRefGoogle Scholar
Hurley, J. R., Tout, C. A., & Pols, O. R. 2002, MNRAS 329, 897CrossRefGoogle Scholar
Izzard, R. G., & Tout, C. A. 2004, MNRAS 350, L1CrossRefGoogle Scholar
Izzard, R. G., Tout, C. A., Karakas, A. I., & Pols, O. R. 2004, MNRAS 350, 407CrossRefGoogle Scholar
Izzard, R. G., Dray, L. M., Karakas, A. I., & Lugaro, M., & Tout, C. A. 2006, A&A 460, 565Google Scholar
Johnson, J. A., Herwig, F., Beers, T. C., & Christlieb, N. 2006, ApJ 658, 1203CrossRefGoogle Scholar
Jonsell, K., Barklem, P. S., Gustafsson, B., Christlieb, N., Hill, V., Beers, T. C., & Holmberg, J. 2006, ApJ 451, 651Google Scholar
Jorissen, A., Smith, V. V., & Lambert, D.L. 1992, A&A 261, 164Google Scholar
Karakas, A. & Lattanzio, J. C. 2007, PASA 24, 103CrossRefGoogle Scholar
Komiya, Y., Suda, T., Minaguchi, H., Shigeyama, T., Aoki, W., & Fujimoto, M. Y. 2007, ApJ 658, 367CrossRefGoogle Scholar
Kroupa, P., Tout, C. A., & Gilmore, G. 1993, MNRAS 262, 545CrossRefGoogle Scholar
Lucatello, S., Tsangarides, S., Beers, T. C., Carretta, E., Gratton, R. G., & Ryan, S. G. 2005, ApJ 625, 825CrossRefGoogle Scholar
Lucatello, S., Gratton, R. G., Beers, T. C., & Carretta, E. 2005, ApJ 625, 833CrossRefGoogle Scholar
Lucatello, S., Beers, T. C., Christlieb, N., Barklem, P. S., Rossi, S., Marsteller, B., Sivarani, T., & Lee, Y. S. 2006, ApJ 652, L37CrossRefGoogle Scholar
Lugaro, M., Ugalde, C., Karakas, A. I., Görres, J., Wiescher, M., Lattanzio, J. C., & Cannon, R. C. 2004, ApJ, 615, 934CrossRefGoogle Scholar
Lugaro, M., de Mink, S. E., Izzard, R. G., et al. 2008, A&A 484, L27Google Scholar
Meynet, G., Ekström, S., & Maeder, A. 2006, A&A 447, 623Google Scholar
Miller, G. E., & Scalo, J. M. 1979, ApJS 41, 513CrossRefGoogle Scholar
Schuler, S. C., Cunha, K., Smith, V. V., Sivarani, T., Beers, T. C., & Lee, Y. S. 2007, ApJ 667, L81CrossRefGoogle Scholar
Stancliffe, R. J., Glebbeek, E., Izzard, R. G., & Pols, O. R. 2007, A&A 464, L57Google Scholar
Suda, T., Katsuta, Y., Yamada, S., et al. 2008, PASJ 60, in press, arXiv:0806.3697CrossRefGoogle Scholar
Umeda, H. & Nomoto, K. 2005, ApJ 619, 427CrossRefGoogle Scholar