77 citations · 506 across the 21 of their papers we have counts for
15 papers · 1 filter
Revisiting mass estimates of the Milky Way
Yongjun Jiao, Francois Hammer, Haifeng Wang +2
We use the rotation curve from Gaia data release (DR) 3 to estimate the mass of the Milky Way. We consider an Einasto density profile to model the dark matter component. We extrapo…
The accretion history of the Milky Way. I. How it shapes globular clusters and dwarf galaxies
Francois Hammer, Hefan Li, Gary A. Mamon +6
Halo inhabitants are individual stars, stellar streams, star and globular clusters, and dwarf galaxies. Here we compare the two last categories that include objects of similar stel…
Evidence for Populations-dependent vertical motions and the Long-lived Non-Steady Lopsided Milky Way Warp
Xiang Li, Hai-Feng Wang, Yang-Ping Luo +3
We present the Galactic disk vertical velocity analysis using OB type stars (OB), Red Clump stars (RC), and Main-Sequence-Turn-Off stars (MSTO) with different average age populatio…
Mapping the Milky Way Disk with Gaia DR3: 3D extended kinematic maps and rotation curve to kpc
Hai-Feng Wang, Žofia Chrobáková, Martín López-Corredoira +1
We apply a statistical deconvolution of the parallax errors based on Lucy's inversion method (LIM) to the Gaia-DR3 sources to measure their three dimensional velocity components in…
Kinematic-Chemical analysis and Time tagging for the Diagonal Ridge Structure of the Galactic Outer Disk with LAMOST Red Giant Branch Stars
Peng Yang, Hai-Feng Wang, Zhi-Quan Luo +2
We investigate the kinematic-chemical distribution of Red Giant Branch (RGB) stars from the LAMOST survey crossed matched with Gaia DR2 proper motions, and present time tagging for…
Mass and Age determination of the LAMOST data with different Machine Learning methods
Qi-Da Li, Hai-Feng Wang, Yang-Ping Luo +3
We present a catalog of 948,216 stars with mass label and a catalog of 163,105 red clump (RC) stars with mass and age labels simultaneously. The training dataset is cross matched f…
The Dark Matter Tidal Stripping History of the Sagittarius Core with N-body simulations
Hai-Feng Wang, Francois Hammer, Yan-Bin Yang +1
The infall of the Sagittarius (Sgr) Dwarf Spheroidal Galaxy in the Milky Way halo is an unique opportunity to understand how the different components of a dwarf galaxy could be tid…
Reconstructing the whole 6D properties of the Sagittarius stream with N-body simulations
Hai-Feng Wang, Yan-Bin Yang, Francois Hammer +1
It is a challenge to reproduce the full 6D space-phase properties of Sagittarius (Sgr) dwarf galaxy and its Stream simultaneously. Using N-body simulations with a Milky Way mass of…
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…
Mapping the Galactic disk with the LAMOST and Gaia Red clump sample: III: A new velocity substructure and time stamps of the Galactic disk asymmetry in the disk between 1215 \,kpc
H. -F. Wang, J. L. Carlin, Y. Huang +11
We investigate the three-dimensional asymmetrical kinematics and present time stamps of the Milky Way disk between Galactocentric distances of and 15 \,kpc, using red clump…
Mapping the Milky Way with LAMOST III: Complicated spatial structure in the outer disc
Hai-Feng Wang, Chao Liu, Yan Xu +2
We present {complexity} of the Galactic outer disc {by fitting the stellar volume densities of the red giant branch stars with a two-disc component model}. {The discs are confirmed…
3D Asymmetrical motions of the Galactic outer disk with LAMOST K giant stars
Haifeng Wang, Martín López-Corredoira, Jeffrey L. Carlin +1
We present a three dimensional velocity analysis of Milky Way disk kinematics using LAMOST K giant stars and the GPS1 proper motion catalogue. We find that Galactic disk stars near…
Rediscovering the Galactic outer disk with LAMOST data
Chao Liu, Yan Xu, Haifeng Wang +1
From the derived stellar density profile using LAMOST giant stars, we find that the Galactic disk does not show truncation or break, but smoothly transit to the halo from 19 kpc. T…
Mapping the Milky Way with LAMOST I: Method and overview
Chao Liu, Yan Xu, Jun-Chen Wan +8
We present a statistical method to derive the stellar density profiles of the Milky Way from spectroscopic survey data, taking into account selection effects. We assume that the se…
The K giant stars from the LAMOST survey data II: the Hercules stream in radial migration
Chao Liu, Xiao-Yan Chen, Jun Yin +11
We estimate the age for the individual stars located at the lower part of the red giant branch from the LAMOST DR2 K giant sample. Taking into account the selection effects and the…