Publications (50)
The local spiral arm in the LAMOST-Gaia common stars?
Chao Liu, You-Gang Wang, Juntai Shen +7
Using the LAMOST-Gaia common stars, we demonstrate that the in-plane velocity field for the nearby young stars are significantly different from that for the old ones. For the young…
LAMOST observations in the Kepler field. Analysis of the stellar parameters measured with the LASP based on the low-resolution spectra
Anbing Ren, Jianning Fu, Peter De Cat +12
All of the 14 subfields of the Kepler field have been observed at least once with the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST, Xinglong Observatory, China…
Relative Flux Calibration of the LAMOST Spectroscopic Survey of the Galactic Anti-center
Maosheng Xiang, Xiaowei Liu, Haibo Yuan +17
We have developed and implemented an iterative algorithm of flux calibration for the LAMOST Spectroscopic Survey of the Galactic anti-center (LSS-GAC). For a given LSS-GAC plate, t…
A catalogue of early-type emission-line stars and Hα line profiles from LAMOST DR2
Wen Hou, ALi Luo, Jingyao Hu +9
We present a catalogue including 11,204 spectra for 10,436 early-type emission-line stars from LAMOST DR2, among which 9,752 early-type emission-line spectra are newly discovered.…
Red Clump Stars from the LAMOST data I: identification and distance
Junchen Wan, Chao Liu, Licai Deng +5
We present a sample of about 120,000 red clump candidates selected from the LAMOST DR2 catalog based on the empirical distribution model in the effective temperature vs. surface gr…
The Milky Way's rotation curve out to 100 kpc and its constraint on the Galactic mass distribution
Yang Huang, Xiaowei Liu, Haibo Yuan +9
The rotation curve (RC) of the Milky Way out to 100 kpc has been constructed using 16,000 primary red clump giants (PRCGs) in the outer disk selected from the LSS-GAC…
The velocity distribution in the solar neighbourhood from the LAMOST pilot survey
Qiran Xia, Chao Liu, Yan Xu +5
We use about 15,000 F/G nearby dwarf stars selected from the LAMOST pilot survey to map the U-V velocity distribution in the solar neighbourhood. An extreme deconvolution algorithm…
Metallicity and Kinematics of the Galactic halo from the LAMOST sample stars
Shuai Liu, Cuihua Du, Heidi Jo Newberg +8
We study the metallicity distribution and kinematic properties of 4,680 A/F/G/K-type giant stars with 5 kpc selected from the LAMOST spectroscopic survey. The metallicity di…
Phase II of the LAMOST-Kepler/K2 survey. I. Time series of medium-resolution spectroscopic observations
Weikai Zong, Jian-Ning Fu, Peter De Cat +20
Phase \RNum{2} of the LAMOST-{\sl Kepler/K}2 survey (LK-MRS), initiated in 2018, aims at collecting medium-resolution spectra (; hereafter MRS) for more than s…
A Sample of E+A Galaxy Candidates in LAMOST Data Released 2
Haifeng Yang, Ali Luo, Xiaoyan Chen +14
A sample of 70 E+A galaxies are selected from 37, 206 galaxies in the second data release (DR2) of Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) according to t…
The LAMOST Stellar Parameter Pipeline at Peking University --- LSP3
Maosheng Xiang, Xiaowei Liu, Haibo Yuan +17
We introduce the LAMOST Stellar Parameter Pipeline at Peking University --- LSP3, developed and implemented for the determinations of radial velocity and stellar atmosp…
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…
New tidal debris nearby the Sagittarius leading tail from the LAMOST DR2 M giant stars
Jing Li, Chao Liu, Jeffrey L. Carlin +7
We report two new tidal debris nearby the Sagittarius (Sgr) tidal stream in the north Galactic cap identified from the M giant stars in LAMOST DR2 data. The M giant stars with sky…
Mass-Ratio Distribution of Binaries From the LAMOST-MRS Survey
Jiangdan Li, Jiao Li, Chao Liu +7
Binary evolution leads to the formation of important objects crucial to the development of astrophysics, but the statistical properties of binary populations are still poorly under…
LAMOST/HRS Spectroscopic Analysis of Two New Li-rich Giants
Zeming Zhou, Jianrong Shi, Hongliang Yan +9
Two Li-rich candidates, TYC 1338-1410-1 and TYC 2825-596-1, were observed with the new high-resolution echelle spectrograph, LAMOST/HRS. Based on the high-resolution and high-signa…
Estimating stellar atmospheric parameters, absolute magnitudes and elemental abundances from the LAMOST spectra with Kernel-based Principal Component Analysis
Maosheng Xiang, Xiaowei Liu, Jianrong Shi +16
Accurate determination of stellar atmospheric parameters and elemental abundances is crucial for Galactic archeology via large-scale spectroscopic surveys. In this paper, we estima…
Kinematics of the Galactic disk from LAMOST Dwarf sample
Yingjie Jing, Cuihua Du, Jiayin Gu +10
Based on the LAMOST survey and Sloan Digital Sky Survey (SDSS), we use low-resolution spectra of 130,043 F/G-type dwarf stars to study the kinematics and metallicity properties of…
Spectroscopic analysis of metal-poor stars from LAMOST: early results
Hai-Ning Li, Gang Zhao, Norbert Christlieb +5
We report on early results from a pilot program searching for metal-poor stars with LAMOST and follow-up high-resolution observation acquired with the MIKE spectrograph attached to…
The first symbiotic stars from the LAMOST survey
Jiao Li, Joanna MikoÅajewska, Xue-Fei Chen +8
Symbiotic stars are interacting binary systems with the longest orbital periods. They are typically formed by a white dwarf, a red giant and a nebula. These objects are natural ast…
The Relative Calibration of Radial Velocity for LAMOST Medium Resolution Stellar Spectra
Jianping Xiong, Bo Zhang, Chao Liu +3
The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) started median-resolution spectroscopic (MRS, R7500) survey since October 2018. The main scientific goa…
The Binarity of Early-type Stars from LAMOST Medium-resolution Spectroscopic Survey
Yanjun Guo, Jiao Li, Jianping Xiong +8
Massive binaries play significant roles in many fields. Identification of massive stars, particularly massive binaries, is of great importance. In this paper, by adopting the techn…
The Jiao Tong University Spectroscopic Telescope Project
JUST Team, Chengze Liu, Ying Zu +28
The Jiao Tong University Spectroscopic Telescope (JUST) is a 4.4-meter f/6.0 segmentedmirror telescope dedicated to spectroscopic observations. The JUST primary mirror is composed…
Radial velocity measurements from LAMOST medium-resolution spectroscopic observations: A pointing towards the Kepler field
Nian Liu, Jian-Ning Fu, Weikai Zong +20
Radial velocity is one of key measurements in understanding the fundamental properties of stars, stellar clusters and the Galaxy. A plate of stars in the Kepler field were observed…
Mapping the Milky Way with LAMOST II: the stellar halo
Yan Xu, Chao Liu, Xiang-Xiang Xue +9
The radial number density and flattening of the Milky Way's stellar halo is measured with metal-poor ([Fe/H]) K giants from LAMOST DR3, using a nonparametric m…
Determination of the Local Standard of Rest using the LSS-GAC DR1
Yang Huang, Xiaowei Liu, Haibo Yuan +5
We re-estimate the peculiar velocity of the Sun with respect to the local standard of rest using a sample of local stars within 600 pc of the Sun, selected from the LAMOST Spectros…
Spectral classification of stars based on LAMOST spectra
Chao Liu, Wen-Yuan Cui, Bo Zhang +6
In this work, we select the high signal-to-noise ratio spectra of stars from the LAMOST data andmap theirMK classes to the spectral features. The equivalentwidths of the prominent…
A New Transition Wolf-Rayet WN/C Star in the Milky Way
Wei Zhang, Helge Todt, Hong Wu +7
We report the discovery of a new transition type Wolf-Rayet (WR) WN/C star in the Galaxy. According to its coordinates (R.A., Dec)J2000 = 18h51m39.7s, -05d34m51.1s, and the distanc…
The size-velocity dispersion relationship of Galactic HII regions
Lin Ma, Yunning Zhao, Wei Zhang +11
The size-velocity dispersion () relation, while well established for giant HII regions, remains uncertain for their smaller counterparts (physical radii R < 20 pc). Thanks to t…
LAMOST Medium-Resolution Spectral Survey of Galactic Nebulae (LAMOST-MRS-N): Subtraction of Geocoronal Halpha Emission
Wei Zhang, Hong Wu, Chaojian Wu +10
We introduce a method of subtracting geocoronal Halpha emissions from the spectra of LAMOST medium-resolution spectral survey of Galactic nebulae (LAMOST-MRS-N). The flux ratios of…
FGK 22 m Excess Stars in LAMOST DR2 Stellar Catalog
Chao-Jian Wu, Hong Wu, Kang Liu +8
Since the release of LAMOST (the Large Sky Area Multi-Object Fiber Spectroscopic Telescope) catalog, we have the opportunity to use the LAMOST DR2 stellar catalog and \emph{WISE Al…
Calibration of LAMOST Stellar Surface Gravities Using the Kepler Asteroseismic Data
Liang Wang, Wei Wang, Yue Wu +7
Asteroseismology is a powerful tool to precisely determine the evolutionary status and fundamental properties of stars. With the unprecedented precision and nearly continuous photo…
The UV Emission of Stars in LAMOST Survey I. Catalogs
Yu Bai, JiFeng Liu, James Wicker +11
We present the ultraviolet magnitudes for over three million stars in the LAMOST survey, in which 2,202,116 stars are detected by . For 889,235 undetected stars, we develop…
The Nearest High-Velocity Stars Revealed by LAMOST Data Release 1
Jing Zhong, Li Chen, Chao Liu +14
We report the discovery of 28 candidate high-velocity stars (HVSs) at heliocentric distances of less than 3 kpc, based on the Large Sky Area Multi-Object Fiber Spectroscopic Telesc…
Determining the local dark matter density with LAMOST data
Qiran Xia, Chao Liu, Shude Mao +7
Measurement of the local dark matter density plays an important role in both Galactic dynamics and dark matter direct detection experiments. However, the estimated values from prev…
Spatially-resolved Galactic HII regions observed by LAMOST medium-Resolution Spectroscopic Survey of Nebulae (LAMOST MRS-N)
Wei Zhang, Yunning Zhao, Lin Ma +9
We present spatially-resolved spectroscopic observations of 10 isolated Galactic HII regions using data from the LAMOST Medium-Resolution Spectroscopic Survey of Nebulae (LAMOST MR…
A sample of metal-poor galaxies identified from the LAMOST spectral survey
Yulong Gao, Jianhui Lian, Xu Kong +8
We present a sample of 48 metal-poor galaxies at selected from 92,510 galaxies in the LAMOST survey. These galaxies are identified for their detection of the auroral em…
Label Transfer from APOGEE to LAMOST: Precise Stellar Parameters for 450,000 LAMOST Giants
Anna Y. Q. Ho, Melissa K. Ness, David W. Hogg +6
In this era of large-scale stellar spectroscopic surveys, measurements of stellar attributes ("labels," i.e. parameters and abundances) must be made precise and consistent across s…
Misclassified B stars in the Kepler field
Chunguang Zhang, Chao Liu, Yue Wu +7
Stellar fundamental parameters are important in the asteroseismic study of Kepler light curves. However, the most used estimates in the Kepler Input Catalog (KIC) are not accurate…
Exoplanet Orbital Eccentricities Derived From LAMOST-Kepler Analysis
Ji-Wei Xie, Subo Dong, Zhaohuan Zhu +14
The nearly circular (mean eccentricity <e>~0.06) and coplanar (mean mutual inclination <i>~3 deg) orbits of the Solar System planets motivated Kant and Laplace to put forth the hyp…
Characterizing the SHARDS of Disrupted Milky Way Satellites with LAMOST
Jeffrey L. Carlin, Chao Liu, Heidi Jo Newberg +7
We derive the fraction of substructure in the Galactic halo using a sample of over 10,000 spectroscopically-confirmed halo giant stars from the LAMOST spectroscopic survey. By obse…
LAMOST Spectroscopic Survey of the Galactic Anti-centre (LSS-GAC): target selection and the first release of value-added catalogues
Haibo Yuan, Xiaowei Liu, Zhiying Huo +16
As a major component of the LAMOST Galactic surveys, the LAMOST Spectroscopic Survey of the Galactic Anti-centre (LSS-GAC) aims to survey a significant volume of the Galactic thin/…
LAMOST observations in the Kepler field. II. Database of the low-resolution spectra from the five-year regular survey
Weikai Zong, Jian-Ning Fu, Peter De Cat +19
The LAMOST-Kepler (LK-) project was initiated to use the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) to make spectroscopic follow-up observations for the tar…
LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC): the second release of value-added catalogues
Maosheng Xiang, Xiaowei Liu, Haibo Yuan +29
We present the second release of value-added catalogues of the LAMOST Spectroscopic Survey of the Galactic Anticentre (LSS-GAC DR2). The catalogues present values of radial velocit…
LAMOST 1: A Disrupted Satellite in the Constellation Draco
John J. Vickers, Martin C. Smith, Yonghui Hou +2
Using LAMOST spectroscopic data, we find a strong signal of a comoving group of stars in the constellation of Draco. The group, observed near the apocenter of its orbit, is 2.6 kpc…
The M-giant star candidates identified in the LAMOST data release 1
Jing Zhong, Sebastien Lepine, Jing Li +6
We perform a discrimination procedure with the spectral index diagram of TiO5 and CaH2+CaH3 to separate M giants from M dwarfs. Using the M giant spectra identified from the LAMOST…
A sample of galaxy pairs identified from the LAMOST spectral survey and the Sloan Digital Sky Survey
Shiyin Shen, M. Argudo-Fernández, Li Chen +23
A small fraction() of SDSS main sample galaxies(MGs) have not been targeted with spectroscopy due to the the fiber collision effect. These galaxies have been compiled into t…
A Large Sample of Am Candidates from LAMOST Data Release 1
Wen Hou, ALi Luo, Haifeng Yang +9
We present a sample of metallic-line star (Am) candidates from the Large sky Area Multi-Object fiber Spectroscopic Telescope Data Release one (LAMOST DR1). According to the charact…
Estimation of distances to stars with stellar parameters from LAMOST
Jeffrey L. Carlin, Chao Liu, Heidi Jo Newberg +15
We present a method to estimate distances to stars with spectroscopically derived stellar parameters. The technique is a Bayesian approach with likelihood estimated via comparison…
Diffuse Ionized Gas in the Anti-center of the Milky Way
Shiming Wen, Wei Zhang, Lin Ma +10
Using data from the LAMOST Medium-Resolution Spectroscopic Survey of Nebulae, we create a sample of 17,821 diffuse ionized gas (DIG) spectra in the anti-center region of the Milky…
Intelligence of Astronomical Optical Telescope: Present Status and Future Perspectives
Kang Huang, Tianzhu Hu, Jingyi Cai +5
Artificial intelligence technology has been widely used in astronomy, and new artificial intelligence technologies and application scenarios are constantly emerging. There have bee…