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Probing the Galactic Halo with RR Lyrae Stars. I. The Catalog

文献类型：期刊论文

作者Liu, G-C1; Huang, Y.2; Zhang, H-W3,4; Xiang, M-S5; Ren, J-J6; Chen, B-Q2; Yuan, H-B7; Wane, C.3; Yang, Y.2; Tian, Z-J8
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2020-04-01
卷号247期号:2页码:13
关键词RR Lyrae variable stars Galaxy abundances Chemical abundances Galaxy structure Milky Way stellar halo
ISSN号0067-0049
DOI10.3847/1538-4365/ab72f8
英文摘要We present a catalog of 5290 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 (SEGUE) surveys. Nearly 70% of them (3642 objects) also have systemic radial velocities measured. Given the pulsating nature of RRLs, metallicity estimates are based on spectra of individual exposures that have been matched with their synthetic templates. The systemic radial velocities are measured by fitting the observed velocity as a function of phase assuming an empirical pulsating velocity template curve. Various tests show that our analyses yield metallicities with a typical precision of 0.20 dex and systemic radial velocities with uncertainties ranging from 5 to 21 km s(-1) (depending on the number of radial-velocity measurements available for a given star). Based on the well-calibrated near-infrared PM(W1)Z or PM(Ks)Z, and M-V-[Fe/H] relations, precise distances are derived for these RRLs. Finally, we include Gaia DR2 proper motions in our catalog. The catalog should be very useful for various Galactic studies, especially of the Galactic halo.
WOS关键词GLOBULAR-CLUSTERS ; MILKY-WAY ; SPECTROSCOPIC SURVEY ; RADIAL-VELOCITY ; VARIABLE-STARS ; STELLAR HALO ; LAMOST ; MASS ; M3 ; METALLICITY
资助项目National Science Foundation of China[U1731108] ; National Science Foundation of China[11903027] ; Natural Science Foundation of CTGU[KJ2014B078] ; National Key R&D Program of China[2019YFA0405500] ; National Natural Science Foundation of China[11973001] ; National Natural Science Foundation of China[U1531244] ; National Natural Science Foundation of China[11833006] ; National Natural Science Foundation of China[11811530289] ; National Development and Reform Commission
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000525520900001
出版者IOP PUBLISHING LTD
资助机构National Science Foundation of China ; National Science Foundation of China ; Natural Science Foundation of CTGU ; Natural Science Foundation of CTGU ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Science Foundation of China ; National Science Foundation of China ; Natural Science Foundation of CTGU ; Natural Science Foundation of CTGU ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Science Foundation of China ; National Science Foundation of China ; Natural Science Foundation of CTGU ; Natural Science Foundation of CTGU ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission ; National Science Foundation of China ; National Science Foundation of China ; Natural Science Foundation of CTGU ; Natural Science Foundation of CTGU ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Development and Reform Commission ; National Development and Reform Commission
源URL[http://ir.bao.ac.cn/handle/114a11/56077]  
专题中国科学院国家天文台
通讯作者Huang, Y.; Liu, X-W
作者单位1.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443002, Peoples R China
2.Yunnan Univ, South Western Inst Astron Res, Kunming 650500, Yunnan, Peoples R China
3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China
5.Max Planck Inst Astron, D-69117 Heidelberg, Germany
6.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
7.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
8.Yunnan Univ, Dept Astron, Kunming 650500, Yunnan, Peoples R China
推荐引用方式
GB/T 7714		 Liu, G-C,Huang, Y.,Zhang, H-W,et al. Probing the Galactic Halo with RR Lyrae Stars. I. The Catalog[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2020,247(2):13.
APA Liu, G-C.,Huang, Y..,Zhang, H-W.,Xiang, M-S.,Ren, J-J.,...&Liu, X-W.(2020).Probing the Galactic Halo with RR Lyrae Stars. I. The Catalog.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,247(2),13.
MLA Liu, G-C,et al."Probing the Galactic Halo with RR Lyrae Stars. I. The Catalog".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 247.2(2020):13.

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