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Radial velocity (RV) is crucial for stellar kinematics and Galactic archaeology. The Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) has obtained over ten million low-resolution spectra ($R \sim 1800$), yielding RVs for…

Solar and Stellar Astrophysics · Physics 2026-04-22 Jinming Zhang , Haibo Yuan , Zhijia Tian

We present a catalogue of 62 polluted white dwarfs observed by the 9th Low-Resolution Data Release of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST LRS DR9v1; R$\approx$1,800) and the Early Data Release 3 (EDR3) of…

Solar and Stellar Astrophysics · Physics 2023-10-31 Mariona Badenas-Agusti , Andrew Vanderburg , Simon Blouin , Patrick Dufour , Javier Viaña , Sara Seager , Sharon X. Wang

We combine narrow/medium-band filter photometry from the Southern Photometric Local Universe Survey (S-PLUS) DR4 with ultra broad-band filter photometry from Gaia EDR3 to derive fundamental stellar parameters ($T_{\rm eff}$, $\log g$,…

We present the data release (DR) 5 catalogue of white dwarf-main sequence (WDMS) binaries from the Large Area Multi-Object fiber Spectroscopic Telescope (LAMOST). The catalogue contains 876 WDMS binaries, of which 757 are additions to our…

Solar and Stellar Astrophysics · Physics 2018-04-11 J. -J. Ren , A. Rebassa-Mansergas , S. G. Parsons , X. -W. Liu , A. -L. Luo , X. Kong , H. -T. Zhang

We present a new version of the compiled catalogue of nearby stars for which was published the spectoscopically determined effective temperatures, surface gravities, and abundances of iron, magnesium, calcium, silicon, and titanium.…

Astrophysics · Physics 2007-10-25 T. V. Borkova , M. S. Katchieva , B. A. Marsakov , D. M. Pitkina

In this paper, we report on 606 S-type stars identified from Data Release 9 of the LAMOST medium-resolution spectroscopic (MRS) survey, and 539 of them are reported for the first time. The discovery of these stars is a three-step process,…

Solar and Stellar Astrophysics · Physics 2022-06-08 Jing Chen , A-Li Luo , Yin-Bi Li , Xiang-Lei Chen , Rui Wang , Shuo Li , Bing Du , Xiao-Xiao Ma

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 Magellan~II telescope. We performed detailed abundance…

Solar and Stellar Astrophysics · Physics 2015-01-14 Hai-Ning Li , Gang Zhao , Norbert Christlieb , Liang Wang , Wei Wang , Yong Zhang , Yonghui Hou , Hailong Yuan

Metal-poor (MP) stars are important targets for investigating the chemical evolution of the early universe. Among them, Carbon-Enhanced Metal-Poor (CEMP) stars have attracted extensive attention due to their rarity and astrophysical…

Solar and Stellar Astrophysics · Physics 2026-03-26 Xianqi Liu , Xiangru Li , Ziyu Fang

We present a catalog of 5,290 RR Lyrae stars (RRLs) with metallicities estimated from spectra of the LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) and the Sloan Extension for Galactic Understanding and Exploration…

Solar and Stellar Astrophysics · Physics 2020-04-15 G. -C. Liu , Y. Huang , H. -W. Zhang , M. -S. Xiang , J. -J. , Ren , B. -Q. Chen , H. -B. Yuan , C. Wang , Y. Yang , Z. -J. Tian , F. Wang , X. -W. Liu

Identification of metal-poor stars among field stars is extremely useful for studying the structure and evolution of the Galaxy and of external galaxies. We search for metal-poor stars using the artificial neural network (ANN) and extend…

Solar and Stellar Astrophysics · Physics 2015-06-16 Sunetra Giridhar , Aruna Goswami , Andrea Kunder , S. Muneer , G. Selvakumar

We introduce the LAMOST Stellar Parameter Pipeline at Peking University --- LSP3, developed and implemented for the determinations of radial velocity $V_{\rm r}$ and stellar atmospheric parameters (effective temperature $T_{\rm eff}$,…

Context. The Gaia mission has opened up a new era for the precise astrometry of stars, thus revolutionizing our understanding of the Milky Way. However, beyond a few kiloparseconds from the Sun, parallax measurements become less reliable,…

Solar and Stellar Astrophysics · Physics 2024-10-16 Yue-Yue Shen , A-Li Luo

We derive stellar parameters and abundances (`stellar labels') of 40,034 late-B and A-type main-sequence stars extracted from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Medium Resolution Survey (LAMOST--MRS). The primary…

Solar and Stellar Astrophysics · Physics 2021-11-17 Weijia Sun , Xiao-Wei Duan , Licai Deng , Richard de Grijs , Bo Zhang , Chao Liu

Very metal-poor (VMP, [Fe/H]<-2.0) stars offer a wealth of information on the nature and evolution of elemental production in the early galaxy and universe. The upcoming China Space Station Telescope (CSST) will provide us with a large…

Solar and Stellar Astrophysics · Physics 2023-02-23 Tianmin Wu , Yude Bu , Jianhang Xie , Junchao Liang , Wei Liu , Zhenping Yi , Xiaoming Kong , Meng Liu

High-precision stellar mass and radius measured directly from binaries can effectively calibrate the stellar models. However, such a database containing full spectral types and large range of metallicity is still not fully established. A…

Solar and Stellar Astrophysics · Physics 2023-01-11 Jianping Xiong , Chao Liu , Jiao Li , Jiadong Li , Bo Zhang , Xiaodian Chen , Changqing Luo , Zihuang Cao , Yongheng Zhao

The chemical abundances of very metal-poor stars provide important constraints on the nucleosynthesis of the first generation of stars and early chemical evolution of the Galaxy. We have obtained high-resolution spectra with the Subaru…

We measure carbon and nitrogen abundances to $\lesssim$ 0.1 dex for 450,000 giant stars from their low-resolution (R$\sim$1800) LAMOST DR2 survey spectra. We use these [C/M] and [N/M] measurements, together with empirical relations based on…

Solar and Stellar Astrophysics · Physics 2017-06-15 Anna Y. Q. Ho , Hans-Walter Rix , Melissa K. Ness , David W. Hogg , Chao Liu , Yuan-Sen Ting

In this work, we update the catalog of M-giant stars from the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data Release 9. There are 58,076 M giants identified from the classification…

Solar and Stellar Astrophysics · Physics 2023-05-03 Jing Li , Lin Long , Jing Zhong , Lin Tang , Bo Zhang , Songmei Qin , Yirong Chen , Zhengzhou Yan , Li Chen , Xiangxiang Xue , Jinliang Hou , Jianrong Shi

The availability of large datasets containing stellar parameters, distances, and extinctions for stars in the Milky Way, particularly within the Galactic disk, is essential for advancing our understanding of the Galaxy's stellar…

Astrophysics of Galaxies · Physics 2025-04-03 Mingxu Sun , Bingqiu Chen , Baokun Sun , Tao Wang , Zheng Yu , Baisong Zhang , Lin Zhang , Yuxi Bao , Guangya Zeng , Ming Yang , Wenyuan Cui

Neutral Fe lines in metal-poor stars yield conflicting abundances depending on whether and how deviations from local thermodynamic equilibrium (LTE) are considered. We have collected new high resolution and high signal-to-noise ultraviolet…

Solar and Stellar Astrophysics · Physics 2018-07-04 Ian U. Roederer , Christopher Sneden , James E. Lawler , Jennifer S. Sobeck , John J. Cowan , Ann Merchant Boesgaard