Investigating the abundance enrichment pattern of heavy elements in the only observed CEMP-r/s star J004441.04-732136.4 of the SMC

	Investigating the abundance enrichment pattern of heavy elements in the only observed CEMP-r/s star J004441.04-732136.4 of the SMC
	Cui WenYuan 1,2; Zhang Bo2 ; Zhao Gang1,3
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2014-06-01
卷号	57 期号:6 页码:1201-1205
关键词	stellar nucleosynthesis abundances chemically peculiar stars
英文摘要	The post-AGB star J004441 is the first and the only one CEMP-r/s star found in SMC. Herein, we investigate the observed abundance pattern of the heavy elements using our parametric model. A consistent fitting results was obtained for the sample star. Based on the low r = 0.08, the s-process nucleosynthesis occurred in the interior is supposed to belong to the single neutron-exposure event. The median value of supports a higher efficiency of the s-process nucleosynthesis relative to J004441 than that of the solar system, however, the value is not sufficiently high to favor the formation of a lead star. Thus, J004441 does not belong to lead star group. The large C (s) value of J004441 supports the intrinsic characteristic of the s-enrichment. The C (s) value is similar with that found in halo CEMP-r/s stars, which indicates that the r-process contributions is critical during heavy element enrichment. This star has a metallicity of [Fe/H] = -1.34, which is larger than that of Galaxy halo CEMP-r/s stars. The reason may be because of the different history of metallicity enrichment between the SMC and the Galaxy halo.
收录类别	SCI
语种	英语
WOS记录号	WOS:000335659600022
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/6355]
专题	国家天文台_光学天文研究部
作者单位	1.Shandong Univ, Sch Space Sci & Phys, Weihai 264209, Peoples R China 2.Hebei Normal Univ, Coll Phys Sci & Informat Engn, Shijiazhuang 050024, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
推荐引用方式 GB/T 7714	Cui WenYuan,Zhang Bo,Zhao Gang. Investigating the abundance enrichment pattern of heavy elements in the only observed CEMP-r/s star J004441.04-732136.4 of the SMC[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2014,57(6):1201-1205.
APA	Cui WenYuan,Zhang Bo,&Zhao Gang.(2014).Investigating the abundance enrichment pattern of heavy elements in the only observed CEMP-r/s star J004441.04-732136.4 of the SMC.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,57(6),1201-1205.
MLA	Cui WenYuan,et al."Investigating the abundance enrichment pattern of heavy elements in the only observed CEMP-r/s star J004441.04-732136.4 of the SMC".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 57.6(2014):1201-1205.