66 citations · 256 across the 18 of their papers we have counts for
13 papers · 1 filter
A large sample of newly-identified carbon-deficient red giants from APOGEE
Sunayana Maben, Yerra Bharat Kumar, Bacham E. Reddy +2
Based on the APOGEE survey we conducted a search for carbon-deficient red giants (CDGs). We found 103 new CDGs, increasing the number in the literature by more than a factor of 3.…
Preliminary Exploration of Areal Density of Angular Momentum for Spiral Galaxies
Lan Zhang, Feilu Wang, Xiangxiang Xue +4
The specific angular momenta () of stars, baryons as a whole and dark matter haloes contain clues of vital importance about how galaxies form and evolve. Using a sample of 70…
The Spectacular Tidal Tails of Globular Cluster M3 (NGC 5272)
Yong Yang, Jing-Kun Zhao, Xin-Zhe Tang +2
We provide a detailed analysis on tidal tails of the globular cluster M3 (NGC 5272). We first discover clear extra-tidal structures with slight S-shape near the cluster. This inspi…
Detection of multiple phase space overdensities of GSE stars by orbit integration
WenboWu, GangZhao, JiangChang +5
In N-body simulations, nearly radial mergers can form shell-like overdensities in the sky position and phase space () due to the combination of dynamical friction and tidal…
A Catalog of Distance Determinations for the LAMOST DR8 K Giants in the Galactic Halo
Lan Zhang, Xiang-Xiang Xue, Chengqun Yang +4
We present a catalog of distances for 19544 K giants drawn from LAMOST DR8. Most of them are located in the halo of the Milky Way up to ~120~kpc. There are 15% K giants without SDS…
The role of radial migration on tracing lithium evolution in the Galactic disk
Haopeng Zhang, Yuqin Chen, Gang Zhao +3
With the calculated guiding center radius and birth radius , we investigate the role of radial migration on the description of lithium evolution in the Gal…
Investigating the vertical distribution of the disk as a function of radial action
Yunpeng Jia, Yuqin Chen, Cuihua Du +1
As heating processes can broaden the distributions of radial actions and the vertical distributions of the Galactic disks, we investigate the vertical distribution of the Galactic…
Evidence for Co-rotation Origin of Super Metal Rich Stars in LAMOST-Gaia: Multiple Ridges with a Similar Slope in phi versus Lz Plane
Yuqin Chen, Gang Zhao, Haopeng Zhang
Super metal-rich (SMR) stars in the solar neighborhood are thought to be born in the inner disk and came to present location by radial migration, which is most intense at the co-ro…
A spectroscopic study of blue supergiant stars in Local Group spiral galaxies: Andromeda and Triangulum
Cheng Liu, Rolf-Peter Kudritzki, Gang Zhao +4
Low-resolution LAMOST and Keck spectra of blue supergiant stars distributed over the disks of the Local Group spiral galaxies M 31 and M 33 are analyzed to determine stellar effect…
The Milky Way Revealed by Variable Stars I: Sample Selection of RR Lyrae stars, and Evidence for the Merger History
I. Ablimit, G. Zhao, U. Teklimakan +2
In order to study the Milky Way, RR Lyrae (RRL) variable stars identified by Gaia, ASAS-SN and ZTF sky survey projects have been analyzed as tracers in this work. Photometric and s…
Contribution of Gaia Sausage to the Galactic Stellar Halo Revealed by K Giants and Blue Horizontal Branch Stars from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope, Sloan Digital Sky Survey, and Gaia
Wenbo Wu, Gang Zhao, Xiang-Xiang Xue +2
We explore the contribution of the Gaia-Sausage to the stellar halo of the Milky Way by making use of a Gaussian Mixture model (GMM) and applying it to halo star samples of LAMOST…
The Behavior of Selected Diffuse Interstellar Bands with Molecular Fraction in Diffuse Atomic and Molecular Clouds
Haoyu Fan, Daniel E. Welty, Donald G. York +10
We study the behavior of eight diffuse interstellar bands (DIBs) in different interstellar environments, as characterized by the fraction of hydrogen in molecular form [(H)]…
The LAMOST Survey of Background Quasars in the Vicinity of the Andromeda and Triangulum Galaxies -- II. Results from the Commissioning Observations and the Pilot Surveys
Zhi-Ying Huo, Xiao-Wei Liu, Mao-Sheng Xiang +68
We present new quasars discovered in the vicinity of the Andromeda and Triangulum galaxies with the LAMOST during the 2010 and 2011 observational seasons. Quasar candidates are sel…