Searching for r-process-enhanced stars in the LAMOST survey Ⅰ: the method

被引：0

作者：

Tian-YiChen ^{[1
,2
]}

Jian-RongShi ^{[1
,2
]}

TimothyC.Beers ^{[3
]}

Hong-LiangYan ^{[1
,2
]}

QiGao ^{[1
,2
]}

Chun-QianLi ^{[1
,2
]}

Hai-NingLi ^{[1
]}

GangZhao ^{[1
,2
]}

机构：

[1] CASKeyLaboratoryofOpticalAstronomy,NationalAstronomicalObservatories,ChineseAcademyofSciences

[2] SchoolofAstronomyandSpaceScience,UniversityofChineseAcademyofSciences

[3] DepartmentofPhysicsandJINACenterfortheEvolutionoftheElements,UniversityofNotreDame

来源：

ResearchinAstronomyandAstrophysics | 2021年 / 21卷 / 02期

基金：

美国国家科学基金会; 国家重点研发计划; 中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

P144 [恒星物理学];

学科分类号：

070401 ;

摘要：

The abundance patterns of r-process-enhanced stars contain key information required to constrain the astrophysical site（s） of r-process nucleosynthesis, and to deepen our understanding of the chemical evolution of our Galaxy. To expand the sample of known r-process-enhanced stars, we have developed a method to search for candidates in the LAMOST medium-resolution（R7500） spectroscopic survey by matching the observed spectra to synthetic templates around the Eu Ⅱ line at 6645.1 A. We obtain a sample of 13 metal-poor（-2.35 < [Fe/H] <-0.91） candidates from 12 209 unique stars with 32 774 mediumresolution spectra. These candidates will be further studied by high-resolution follow-up observations in the near future. We describe some extensions of this effort to include larger samples of stars, in particular at lower metallicity, using the strength of the Ba Ⅱ line at 6496.9 A.

引用

页码：91 / 98

页数：8

共 15 条

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