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

摘要：

We present the results of binary population simulations of carbon-enhanced metalpoor (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.

关键词： Stars:AGB and post-AGB stars:evolution stars:binaries stars:abundances stars:mass function

作者: O.R.Pols R.G.Izzard M.Lugaro S.E.de Mink

作者单位: Sterrekundig Instituut Utrecht,P.0.Box 80000,NL-3584 TA Utrecht,The Netherlands

会议类型: 国际会议

会议名称: The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

会议地点: 海南三亚

会议语种:英文

页码: 383-390

在线出版日期: 2008-04-06（万方平台首次上网日期，不代表论文的发表时间）