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Kinematics of the Galactic disc from a LAMOST dwarf sample
Jing, Yingjie1; Du, Cuihua1; Gu, Jiayin2; Jia, Yunpeng3; Peng, Xiyan3; Chen, Yuqin3; Wu, Zhenyu3; Ma, Jun3; Zhou, Xu3; Cao, Zihuang3; Hou, Yonghui4; Wang, Yuefei4; Zhang, Yong4
2016-12-01
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷号463期号:3页码:3390-3397
摘要Based on the LAMOST survey and Sloan Digital Sky Survey, we use low-resolution spectra of 130 043 F/G-type dwarf stars to study the kinematics and metallicity properties of the Galactic disc. Our study shows that the stars with poorer metallicity and larger vertical distance from the Galactic plane tend to have a larger eccentricity and velocity dispersion. After separating the sample stars into likely thin-disc and thick-disc sub-samples, we find that there exists a negative gradient of rotation velocity V-phi with metallicity [Fe/H] for the likely thin-disc subsample, and the thick-disc sub-sample exhibits a larger positive gradient of rotation velocity with metallicity. By comparing with model predictions, we consider that the radial migration of stars appears to have influenced the formation of the thin disc. In addition, our results show that the observed thick-disc stellar orbital eccentricity distribution peaks at low eccentricity (e similar to 0.2) and extends to a high eccentricity (e similar to 0.8). We compare this result with four thick-disc formation simulation models, which imply that our result is consistent with the gas-rich merger model.
文章类型Article
关键词Galaxy: Disc Galaxy: Formation Galaxy: Kinematics And Dynamics Galaxy: Structure
WOS标题词Science & Technology ; Physical Sciences
资助者Astronomy of the National Natural Science Foundation of China ; Astronomy of the National Natural Science Foundation of China ; Chinese Academy of Sciences(U1231113) ; Chinese Academy of Sciences(U1231113) ; National Natural Foundation of China(11373033 ; National Natural Foundation of China(11373033 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Development and Reform Commission ; National Development and Reform Commission ; 11373035) ; 11373035) ; 2014CB845704 ; 2014CB845704 ; 2013CB834902) ; 2013CB834902) ; Astronomy of the National Natural Science Foundation of China ; Astronomy of the National Natural Science Foundation of China ; Chinese Academy of Sciences(U1231113) ; Chinese Academy of Sciences(U1231113) ; National Natural Foundation of China(11373033 ; National Natural Foundation of China(11373033 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Development and Reform Commission ; National Development and Reform Commission ; 11373035) ; 11373035) ; 2014CB845704 ; 2014CB845704 ; 2013CB834902) ; 2013CB834902)
DOI10.1093/mnras/stw2230
关键词[WOS]DIGITAL SKY SURVEY ; MILKY-WAY TOMOGRAPHY ; ROTATION-METALLICITY CORRELATION ; DARK-MATTER UNIVERSE ; GAIA-ESO SURVEY ; THICK-DISK ; SOLAR NEIGHBORHOOD ; ELEMENTAL ABUNDANCE ; DATA RELEASE ; STELLAR KINEMATICS
收录类别SCI
语种英语
资助者Astronomy of the National Natural Science Foundation of China ; Astronomy of the National Natural Science Foundation of China ; Chinese Academy of Sciences(U1231113) ; Chinese Academy of Sciences(U1231113) ; National Natural Foundation of China(11373033 ; National Natural Foundation of China(11373033 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Development and Reform Commission ; National Development and Reform Commission ; 11373035) ; 11373035) ; 2014CB845704 ; 2014CB845704 ; 2013CB834902) ; 2013CB834902) ; Astronomy of the National Natural Science Foundation of China ; Astronomy of the National Natural Science Foundation of China ; Chinese Academy of Sciences(U1231113) ; Chinese Academy of Sciences(U1231113) ; National Natural Foundation of China(11373033 ; National Natural Foundation of China(11373033 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Basic Research Program of China (973 Program)(2014CB845702 ; National Development and Reform Commission ; National Development and Reform Commission ; 11373035) ; 11373035) ; 2014CB845704 ; 2014CB845704 ; 2013CB834902) ; 2013CB834902)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000393566000088
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8292
专题光学天文研究部
作者单位1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
2.Wuhan Univ Technol, Dept Phys, Wuhan 430000, Peoples R China
3.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China
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GB/T 7714
Jing, Yingjie,Du, Cuihua,Gu, Jiayin,et al. Kinematics of the Galactic disc from a LAMOST dwarf sample[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(3):3390-3397.
APA Jing, Yingjie.,Du, Cuihua.,Gu, Jiayin.,Jia, Yunpeng.,Peng, Xiyan.,...&Zhang, Yong.(2016).Kinematics of the Galactic disc from a LAMOST dwarf sample.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(3),3390-3397.
MLA Jing, Yingjie,et al."Kinematics of the Galactic disc from a LAMOST dwarf sample".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.3(2016):3390-3397.
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