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

作　　者：Tian-Yi Chen Jian-Rong Shi Timothy CBeers Hong-Liang Yan Qi Gao Chun-Qian Li Hai-Ning Li Gang Zhao 

机构地区：[1]CAS Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [3]Department of Physics and JINA Center for the Evolution of the Elements,University of Notre Dame,Notre Dame,IN 46556,USA

出　　处：《Research in Astronomy and Astrophysics》2021年第2期89-96,共8页天文和天体物理学研究（英文版）

基　　金：supported by National Key R&D Program of China(Grant No.2019YFA0405502);the Key Research Program of the Chinese Academy of Sciences(Grant No.XDPB09-02);the National Natural Science Foundation of China(Grant Nos.11833006,11473033,11603037,11973049,and 11973052);the international partnership program’s key foreign cooperation project,Bureau of International Cooperation,Chinese Academy of Sciences(Grant No.114A32KYSB20160049);the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB34020205);supported by the Astronomical Big Data Joint Research Center,co-founded by the National Astronomical Observatories,Chinese Academy of Sciences and Alibaba Cloud;partial support for this work from grant PHY 14-30152;Physics Frontier Center/JINA Center for the Evolution of the Element(JINA-CEE),awarded by the US National Science Foundation;partially supported by the Open Project Program of the Key Laboratory of Optical Astronomy,National Astronomical Observatories,Chinese Academy of Sciences;Funding for the project has been provided by the National Development and Reform Commission。

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 EuⅡline at 6645.1 A.We obtain a sample of 13 metal-poor(-2.35<[Fe/H]<-0.91)candidates from 12209 unique stars with 32774 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 BaⅡline at 6496.9 A.

关 键 词：STARS abundances-stars chemically peculiar-stars STATISTICS 

分 类 号：P144[天文地球—天体物理]