J
Juanjuan Ren
Researcher at Chinese Academy of Sciences
Publications - 83
Citations - 1802
Juanjuan Ren is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Stars & LAMOST. The author has an hindex of 22, co-authored 78 publications receiving 1463 citations. Previous affiliations of Juanjuan Ren include Peking University.
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Journal ArticleDOI
The Milky Way's rotation curve out to 100 kpc and its constraint on the Galactic mass distribution
Yang Huang,Xiaowei Liu,Haibo Yuan,Mao-Sheng Xiang,H. W. Zhang,Bingqiu Chen,Juanjuan Ren,Chao Wang,Yue-Yang Zhang,Yong-Hui Hou,Y. Wang,Zhiqiang Cao +11 more
TL;DR: The rotation curve of the Milky Way out to 100 kpc has been constructed using 16,000 primary red clump giants (PRCGs) in the outer disk selected from the LSS-GAC and the SDSS-III/APOGEE survey as discussed by the authors.
Journal ArticleDOI
LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC): the second release of value-added catalogues
Mao-Sheng Xiang,Xiaowei Liu,Haibo Yuan,Zhi-Ying Huo,Yang Huang,Chun Wang,Bingqiu Chen,Juanjuan Ren,H. W. Zhang,Zhijia Tian,Yujin Yang,Yujin Yang,Jianrong Shi,Jingkun Zhao,Jing Li,Yong-Heng Zhao,Xiang-Han Cui,Guang-Wei Li,Yong-Hui Hou,Yong Zhang,Wei Zhang,Jiali Wang,Yue Wu,Zhiqiang Cao,Hong-Liang Yan,T.-S. Yan,A-Li Luo,Hong Zhang,Zhong-Rui Bai,Hailong Yuan,Yun-Ming Dong,Ya-Juan Lei,Guanghua Li +32 more
TL;DR: The second release of value-added catalogues of the LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC DR2) is presented in this paper.
Journal ArticleDOI
Estimating stellar atmospheric parameters, absolute magnitudes and elemental abundances from the LAMOST spectra with Kernel-based principal component analysis
Mao-Sheng Xiang,Xiaowei Liu,Jianrong Shi,Haibo Yuan,Yang Huang,A-Li Luo,Hua-Wei Zhang,Yong-Heng Zhao,Jian Zhang,Juanjuan Ren,Bingqiu Chen,Chun Wang,Jing Li,Zhi-Ying Huo,Wei Zhang,Jiali Wang,Yong Zhang,Yong-Hui Hou,Yue-Fei Wang +18 more
TL;DR: In this paper, a kernel-based principal component analysis (KPCA) was used to estimate stellar atmospheric parameters and elemental abundances from large-scale spectroscopic surveys.
Journal ArticleDOI
A wide star–black-hole binary system from radial-velocity measurements
Jifeng Liu,Jifeng Liu,Haotong Zhang,Andrew W. Howard,Zhong-Rui Bai,Youjun Lu,Roberto Soria,Roberto Soria,Stephen Justham,Stephen Justham,Xiang-Dong Li,Zheng Zheng,Tinggui Wang,Krzysztof Belczynski,Jorge Casares,Jorge Casares,Wei Zhang,Hailong Yuan,Yi-Qiao Dong,Ya-Juan Lei,Howard Isaacson,Song Wang,Yu Bai,Yong Shao,Qing Gao,Yilun Wang,Zexi Niu,Kaiming Cui,Chuanjie Zheng,Xiaoyong Mu,Lan Zhang,Wei Wang,Alexander Heger,Zhaoxiang Qi,Shilong Liao,Mario G. Lattanzi,Wei-Min Gu,Junfeng Wang,Jianfeng Wu,Lijing Shao,Rongfeng Shen,Xiao-Feng Wang,Joel N. Bregman,Rosanne Di Stefano,Qing-Zhong Liu,Zhanwen Han,Tianmeng Zhang,Huijuan Wang,Juanjuan Ren,Junbo Zhang,Jujia Zhang,Xiaoli Wang,Antonio Cabrera-Lavers,Romano L. M. Corradi,Rafael Rebolo,Yongheng Zhao,Gang Zhao,Yaoquan Chu,Xiangqun Cui +58 more
TL;DR: In this paper, the authors reported radial-velocity measurements taken over two years of the Galactic B-type star, LB-1, and found that the motion of the B star and an accompanying Hα emission line require the presence of a dark companion with a mass of about 68 solar masses, which can only be a black hole.
Journal ArticleDOI
A wide star-black-hole binary system from radial-velocity measurements
Jifeng Liu,Jifeng Liu,Haotong Zhang,Andrew W. Howard,Zhong-Rui Bai,Youjun Lu,Roberto Soria,Roberto Soria,Stephen Justham,Stephen Justham,Xiang-Dong Li,Zheng Zheng,Tinggui Wang,Krzysztof Belczynski,Jorge Casares,Jorge Casares,Wei Zhang,Hailong Yuan,Yi-Qiao Dong,Ya-Juan Lei,Howard Isaacson,Song Wang,Yu Bai,Yong Shao,Qing Gao,Yilun Wang,Zexi Niu,Kaiming Cui,Chuanjie Zheng,Xiaoyong Mu,Lan Zhang,Wei Wang,Alexander Heger,Zhaoxiang Qi,Shilong Liao,Mario G. Lattanzi,Wei-Min Gu,Junfeng Wang,Jianfeng Wu,Lijing Shao,Rongfeng Shen,Xiao-Feng Wang,Joel N. Bregman,Rosanne Di Stefano,Qing-Zhong Liu,Zhanwen Han,Tianmeng Zhang,Huijuan Wang,Juanjuan Ren,Junbo Zhang,Jujia Zhang,Xiaoli Wang,Antonio Cabrera-Lavers,Romano L. M. Corradi,Rafael Rebolo,Yongheng Zhao,Gang Zhao,Yaoquan Chu,Xiangqun Cui +58 more
TL;DR: Radial-velocity measurements of a Galactic B-type star show a dark companion that seems to be a black hole of about 68 solar masses, in a widely spaced binary system.