NAOC Open IR  > 光学天文研究部
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
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume463Issue:3Pages:3390-3397
AbstractBased 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.
SubtypeArticle
KeywordGalaxy: Disc Galaxy: Formation Galaxy: Kinematics And Dynamics Galaxy: Structure
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationAstronomy 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
WOS KeywordDIGITAL SKY SURVEY ; MILKY-WAY TOMOGRAPHY ; ROTATION-METALLICITY CORRELATION ; DARK-MATTER UNIVERSE ; GAIA-ESO SURVEY ; THICK-DISK ; SOLAR NEIGHBORHOOD ; ELEMENTAL ABUNDANCE ; DATA RELEASE ; STELLAR KINEMATICS
Indexed BySCI
Language英语
Funding OrganizationAstronomy 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000393566000088
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8292
Collection光学天文研究部
Affiliation1.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
Recommended Citation
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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