L
Lan Zhang
Researcher at Chinese Academy of Sciences
Publications - 35
Citations - 1018
Lan Zhang is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Stars & Galactic halo. The author has an hindex of 13, co-authored 33 publications receiving 792 citations. Previous affiliations of Lan Zhang include Max Planck Society & University of Chile.
Papers
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Journal ArticleDOI
The Gravitational Potential near the Sun from SEGUE K-dwarf Kinematics
TL;DR: In this paper, the authors derived and modeled the spatial and velocity distributions for a sample of 9000 K-dwarfs with spectra from SDSS/SEGUE, which yield radial velocities and abundances ([Fe/H] and [{alpha/Fe]).
Journal ArticleDOI
The vertical motions of mono-abundance sub-populations in the milky way disk
Jo Bovy,Hans-Walter Rix,David W. Hogg,David W. Hogg,Timothy C. Beers,Young Sun Lee,Lan Zhang +6 more
TL;DR: In this paper, the vertical kinematics of stars in the Milky Way's stellar disk inferred from Sloan Digital Sky Survey/Sloan Extension for Galactic Understanding and Exploration (SDSS/SEGUE) G-dwarf data were derived.
Journal ArticleDOI
The Gravitational Potential Near the Sun From SEGUE K-dwarf Kinematics
TL;DR: In this paper, the vertical Jeans Equation was used to fit the dispersion and density profiles of all abundance selected sub-populations simultaneously in the same potential, and explore all parameter co-variances using MCMC.
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.