303 citations · 1.2k across the 30 of their papers we have counts for
18 papers · 1 filter
Correlation between the two-armed spiral in the -- plane and moving groups
Yan Xu, Chao Liu, Chengdong Li +5
We use a cross-matched sample of 3.7 million stars from Gaia DR3 and LAMOST DR7 to investigate the velocity substructures in the Milky Way disk. The median radial velocity as…
Detailed Mapping of the Galactic Disk Structure in the Solar Neighborhood through LAMOST K Dwarfs
Xi-Can Tang, Hao Tian, Jing Li +4
The Galactic disk is one of the main components of the Milky Way, which contributes most of the luminosity. Its structure is essential for understanding the formation and evolution…
On the identification of N-rich metal-poor field stars with future China space station telescope
Jiajun Zhang, Baitian Tang, Jiang Chang +6
During the long term evolution of globular clusters (GCs), a part of member stars are lost to the field. The recently found nitrogen-rich (N-rich) metal-poor field stars are promis…
Exploring asymmetric substructures of the outer disk based on the conjugate angle of the radial action
Y. Xu, C. Liu, Z. Li +5
We use the conjugate angle of radial action (), the best representation of the orbital phase, to explore the "mid-plane, north branch, south branch" and "Monoceros area" disk…
The first comprehensive Milky Way stellar mock catalogue for the Chinese Space Station Telescope Survey Camera
Yang Chen, Xiaoting Fu, Chao Liu +9
The Chinese Space Station Telescope (CSST) is a cutting-edge two-meter astronomical space telescope currently under construction. Its primary Survey Camera (SC) is designed to cond…
Stellar Initial Mass Function Varies with Metallicities and Time
Jiadong Li, Chao Liu, Zhi-Yu Zhang +4
Most structural and evolutionary properties of galaxies strongly rely on the stellar initial mass function (IMF), namely the distribution of the stellar mass formed in each episode…
Is the core-cusp problem a matter of perspective: Jeans Anisotropic Modeling against numerical simulations
Wenting Wang, Ling Zhu, Zhaozhou Li +14
Mock member stars for 28 dwarf galaxies are constructed from the cosmological Auriga simulation, which reflect the dynamical status of realistic stellar tracers. The axis-symmetric…
Searching Extra-tidal Features around the Globular Cluster Whiting 1
Jundan Nie, Hao Tian, Jing Li +14
Whiting 1 is a faint and young globular cluster in the halo of the Milky Way, and was suggested to have originated in the Sagittarius spherical dwarf galaxy (Sgr dSph). In this pap…
Search for the metal-weak thick disk from the LAMOST DR5
T. -S. Yan, J. -R. Shi, H. Tian +2
Based on the data release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey (LAMOST DR5) and the \emph{Gaia} Early Data Release 3 (\emph{Gaia} EDR3), we const…
The Flare and Warp of the Young Stellar Disk traced with LAMOST DR5 OB-type stars
Yang Yu, Hai-Feng Wang, Wen-Yuan Cui +9
We present analysis of the spatial density structure for the outer disk from 814 \,kpc with the LAMOST DR5 13534 OB-type stars and observe similar flaring on north and south sid…
Exploring the Galactic Anticenter substructure with LAMOST & Gaia DR2
Jing Li, Xiang-Xiang Xue, Chao Liu +12
We characterize the kinematic and chemical properties of 589 Galactic Anticenter Substructure Stars (GASS) with K-/M- giants in Integrals-of-Motion space. These stars likely includ…
Differential rotation of the halo traced by the K-giant stars
Hao Tian, Chao Liu, Yougang Wang +4
We use K-giant stars selected from the LAMOST DR5 to study the variation of the rotational velocity of the galactic halo at different space positions. Modelling the rotational velo…
Tracing Kinematic and Chemical Properties of Sagittarius Stream by K-Giants, M-Giants, and BHB stars
Chengqun Yang, Xiang-Xiang Xue, Jing Li +12
We characterize the kinematic and chemical properties of 3,000 Sagittarius (Sgr) stream stars, including K-giants, M-giants, and BHBs, select from SEGUE-2, LAMOST, and SDSS s…
Identifying Galactic Halo Substructure in 6D Phase-space Using 13,000 LAMOST K Giants
Chengqun Yang, Xiang-Xiang Xue, Jing Li +6
We construct a large halo K-giant sample by combining the positions, distances, radial velocities, and metallicities of over 13,000 LAMOST DR5 halo K giants with the Gaia DR2 prope…
Detecting the Sagittarius stream with LAMOST DR4 M giants \& Gaia DR2
Jing Li, Chao Liu, Xiangxiang Xue +4
We use LAMOST DR4 M giants combined with Gaia DR2 proper motions and ALLWISE photometry to obtain an extremely pure sample of Sagittarius (Sgr) stream stars. Using TiO5 and CaH spe…
An intuitive 3D map of the Galactic warp's precession traced by classical Cepheids
Xiaodian Chen, Shu Wang, Licai Deng +3
The Milky Way's neutral hydrogen (HI) disk is warped and flared. However, a dearth of accurate HI-based distances has thus far prevented the development of an accurate Galactic dis…
Rotating halo traced by the K giant stars from LAMOST and Gaia
Hao Tian, Chao Liu, Yan Xu +1
With the help of Gaia DR2, we are able to obtain the full 6-D phase space information for stars from LAMOST DR5. With high precision of position, velocity, and metallicity, the rot…
Selecting M-giants with infra-red photometry: Distances, metallicities and the Sagittarius stream
Jing Li, Martin C. Smith, Jing Zhong +9
Using a spectroscopically confirmed sample of M-giants, M-dwarfs and quasars from the LAMOST survey, we assess how well WISE 2MASS color-cuts can be used to select M-giant sta…