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Properties of Radial Velocities Measurement Based on LAMOST-II Medium-resolution Spectroscopic Observations
Wang, R.1,2; Luo, A.-L.1,2; Chen, J.-J.1; Bai, Z.-R.1; Chen, L.2,3; Chen XF(陈雪飞)4; Dong, S.-B.5; Du, B.1; Fu, J.-N.6; Han ZW(韩占文)4; Hou, J.-L.2,3; Hou, Y.-H.2,7; Hou, W.1; Jiang DK(姜登凯)4; Kong, X.1; Li LF(李立芳)4; Liu, C.1,2; Liu, J.-M.1; Qin, L.1,2; Shi, J.-R.1,2; Tian, H.1; Wu, H.1,2; Wu, C.-J.1; Xie, J.-W.8,9; Zhang, H.-T.1; Zhang, S.1,2; Zhao, G.1,2; Zhao, Y.-H.1,2; Zhong, J.3; Zong, W.-K.6; Zuo, F.1,2
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2019-10-01
Volume244Issue:2Pages:9
DOI10.3847/1538-4365/ab3cc0
Contribution Rank第4完成单位
Indexed BySCI
Keywordbinaries: spectroscopic methods: data analysis techniques: spectroscopic
Abstract

The radial velocity (RV) is a basic physical quantity that can be determined through the Doppler shift of the spectrum of a star. The precision of the RV measurement depends on the resolution of the spectrum we used and the accuracy of wavelength calibration. In this work, radial velocities of the Large Sky Area Multi-Object Fibre Spectroscopic Telescope-II (LAMOST-II) medium-resolution (R similar to 7500) spectra are measured for 1,594,956 spectra (each spectrum has two wavebands) through matching with templates. A set of RV standard stars are used to recalibrate the zero point of the measurement, and some reference sets with RVs derived from medium-/high-resolution observations are used to evaluate the accuracy of the measurement. By comparing with reference sets, the accuracy of our measurement can get 0.0277 kms(-1) with respect to radial velocities of standard stars. The intrinsic precision is estimated with the multiple observations of single stars, which can be achieved to 1.36 kms(-1), 1.08 kms(-1), and 0.91 kms(-1) for the spectra at signal-to-noise levels of 10, 20, and 50, respectively.

Funding ProjectNational Key Basic Research Program of China[2014CB845700] ; National Natural Science Foundation of China[11390371] ; China Scholarship Council, Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007] ; National Development and Reform Commission
Funding OrganizationNational Key Basic Research Program of China[2014CB845700] ; National Natural Science Foundation of China[11390371] ; China Scholarship Council, Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-SLH007] ; National Development and Reform Commission
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0067-0049
URL查看原文
WOS IDWOS:000502057800001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordEXPERIMENT RAVE ; SEGUE ; STARS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/21445
Collection大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorLuo, A.-L.
Affiliation1.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People's Republic of China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China
5.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China
6.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China
7.Nanjing Institute of Astronomical Optics, & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing 210042, People's Republic of China
8.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People's Republic of China
9.Key Laboratory of Modern Astronomy and Astrophysics in Ministry of Education, Nanjing University, Nanjing 210093, People's Republic of China
Recommended Citation
GB/T 7714
Wang, R.,Luo, A.-L.,Chen, J.-J.,et al. Properties of Radial Velocities Measurement Based on LAMOST-II Medium-resolution Spectroscopic Observations[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2019,244(2):9.
APA Wang, R..,Luo, A.-L..,Chen, J.-J..,Bai, Z.-R..,Chen, L..,...&Zuo, F..(2019).Properties of Radial Velocities Measurement Based on LAMOST-II Medium-resolution Spectroscopic Observations.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,244(2),9.
MLA Wang, R.,et al."Properties of Radial Velocities Measurement Based on LAMOST-II Medium-resolution Spectroscopic Observations".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 244.2(2019):9.
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