Reanalysis of the Isotopic Mixture of Neutron-Capture Elements in the Metal-Poor Star HD 175305

	Reanalysis of the Isotopic Mixture of Neutron-Capture Elements in the Metal-Poor Star HD 175305
	Zhang J(张江)1,2,3 ; Wang B(王博)1,2 ; Zhang, B4 ; Han ZW(韩占文)1,2
刊名	CHINESE PHYSICS LETTERS
	2012-01
卷号	29 期号:1
ISSN号	0256-307X
通讯作者	Zhang, J (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	The neutron-capture process is traditionally postulated to be responsible for the nucleosynthesis of heavy elements beyond Fe. Based on the least squares method and solar isotopic abundances from the classical model, we estimate the relative contributions of the s- and r-processes to the abundance of neutron-capture elements in the metal-poor star HD 175305 from the component coefficients. Applying the calculated component coefficients C-r and C-s, the model predicts the isotopic fractions of elements Nd, Sm and Eu to be f(142+ 144) = 0.482, f(152+ 154) = 0.525 and f(151) = 0.450, respectively. As well as the observed abundances, the isotropic fractions are also consistent with the calculations. Finally, for the first time, we estimated the contribution percentage of the two neutron processes (the r-and s-processes) from the observed isotopic fractions of different elements in HD 175305, e.g. an r-process contribution of 67%(- 21%)(-32%) from the 4604 angstrom line of Sm.
学科主题	Physics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Multidisciplinary
研究领域[WOS]	Physics
关键词[WOS]	GIANT BRANCH STARS ; S-PROCESS NUCLEOSYNTHESIS ; R-PROCESS-RICH ; ABUNDANCE RATIOS ; HEAVY-ELEMENTS ; EVOLUTION ; HALO ; FRACTIONS ; EUROPIUM ; UNIVERSE
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0256-307X/29/1/019701/meta
语种	英语
WOS记录号	WOS:000300309500082
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4543]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011 3.School of Mathematics and Science, Shijiazhuang University of Economics, Shijiazhuang 050016 4.Department of Physics, Hebei Normal University, Shijiazhuang 050016
推荐引用方式 GB/T 7714	Zhang J,Wang B,Zhang, B,et al. Reanalysis of the Isotopic Mixture of Neutron-Capture Elements in the Metal-Poor Star HD 175305[J]. CHINESE PHYSICS LETTERS,2012,29(1).
APA	Zhang J,Wang B,Zhang, B,&Han ZW.(2012).Reanalysis of the Isotopic Mixture of Neutron-Capture Elements in the Metal-Poor Star HD 175305.CHINESE PHYSICS LETTERS,29(1).
MLA	Zhang J,et al."Reanalysis of the Isotopic Mixture of Neutron-Capture Elements in the Metal-Poor Star HD 175305".CHINESE PHYSICS LETTERS 29.1(2012).