553 citations · 5.8k across the 128 of their papers we have counts for
13 papers · 1 filter
Exploring the spectral \textit{information content} in the LAMOST medium-resolution survey (MRS)
Bo Zhang, Chao Liu, Chun-Qian Li +3
Low-resolution spectra are proved competitive to high-resolution spectra in determining many stellar labels at comparable precision. It is useful to consider the spectral informati…
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…
High-resolution Infrared Spectrograph for Exoplanet Characterization with the Keck and Thirty Meter Telescopes
Dimitri Mawet, Michael Fitzgerald, Quinn Konopacky +46
HISPEC (High-resolution Infrared Spectrograph for Exoplanet Characterization) is a proposed diffraction-limited spectrograph for the W.M. Keck Observatory, and a pathfinder for the…
Smoking Gun of the Dynamical Processing of the Solar-type Field Binary Stars
Chao Liu
We investigate the binarity properties in field stars using more than 50\,000 main-sequence stars with stellar mass from 0.4 to 0.85\, observed by LAMOST and {\emph Gaia}…
Deriving the stellar labels of LAMOST spectra with Stellar LAbel Machine (SLAM)
Bo Zhang, Chao Liu, Li-Cai Deng
The LAMOST survey has provided 9 million spectra in its Data Release 5 (DR5) at R1800. Extracting precise stellar labels is crucial for such a large sample. In this paper, we…
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…
A Catalogue of OB Stars from LAMOST Spectroscopic Survey
Zhicun Liu, Wenyuan Cui, Chao Liu +3
We present 22\,901 OB spectra of 16\,032 stars identified from LAMOST DR5 dataset. A larger sample of OB candidates are firstly selected from the distributions in the spectral line…
SDSS-IV MaNGA: Environmental dependence of the Mgb/<Fe>-sigma_* relation for nearby galaxies
Zheng Zheng, Cheng Li, Shude Mao +13
We use a sample of ~3000 galaxies from the MaNGA MPL-7 internal data release to study the alpha abundance distribution within low-redshift galaxies. We use the Lick index ratio Mgb…
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…
Revealing the Complicated Story of the Cetus Stream with StarGO
Zhen Yuan, M. C. Smith, Xiang-Xiang Xue +5
We use a novel cluster identification tool StarGO to explore the metal poor ([Fe/H] -1.5) outer stellar halo (d 15 kpc) of the Milky Way using data from Gaia, LAMOST and SD…
Ripple patterns in in-plane velocities of OB stars from LAMOST and Gaia
Xinlun Cheng, Chao Liu, Shude Mao +1
With about 12 000 OB type stars selected from the LAMOST and Gaia survey, we study their 3 dimensional velocity distribution over the range of galactocentric radius from 6 to 15 kp…
Frequent flare events on the short-period M-type eclipsing binary BX Tri
ChangQing Luo, XiaoBin. Zhang, Kun Wang +8
We present long-term, multi-color photometric monitoring and spectroscopic observations of the short-period M-type eclipsing binary BX Tri. Six flare events were recorded in 4 year…