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Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS

文献类型：期刊论文

作者Oswalt, T. D.3; Zhang, L.2; Chen, Y. Q.1,2; Zhao, J. K.2; Liang, X. L.1,2; Zhao, G.1,2
刊名ASTROPHYSICAL JOURNAL
出版日期2017-08-01
卷号844期号:2
关键词Galaxy: Kinematics And Dynamics
DOI10.3847/1538-4357/aa7cf7
文献子类Article
英文摘要We have cross-matched the LAMOST DR3 with the Gaia DR1 TGAS catalogs and obtained a sample of 166,827 stars with reliable kinematics. A technique based on the wavelet transform was applied to detect significant overdensities in velocity space among five subsamples divided by spatial position. In total, 16 significant overdensities of stars with very similar kinematics were identified. Among these, four are new stream candidates and the rest are previously known groups. Both the U-V velocity and metallicity distributions of the local sample show a clear gap between the Hercules structure and the Hyades-Pleiades structure. The U-V positions of these peaks shift with the spatial position. Following a description of our analysis, we speculate on possible origins of our stream candidates.
WOS关键词OUTER LINDBLAD RESONANCE ; SPIRAL STRUCTURE ; GALACTIC BAR ; VELOCITY DISTRIBUTION ; KINEMATIC GROUPS ; MOVING GROUPS ; DATA RELEASE ; CHAOS ; RAVE ; DISC
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000406841700005
资助机构National Natural Science Foundation of China(11390371 ; National Natural Science Foundation of China(11390371 ; National Key Basic Research Program of China (973 program)(2014CB845701 ; National Key Basic Research Program of China (973 program)(2014CB845701 ; US National Science Foundation(AST-1358787) ; US National Science Foundation(AST-1358787) ; National Development and Reform Commission ; National Development and Reform Commission ; 11233004 ; 11233004 ; 2014CB845703) ; 2014CB845703) ; U1431106 ; U1431106 ; 11573035 ; 11573035 ; 11625313) ; 11625313) ; National Natural Science Foundation of China(11390371 ; National Natural Science Foundation of China(11390371 ; National Key Basic Research Program of China (973 program)(2014CB845701 ; National Key Basic Research Program of China (973 program)(2014CB845701 ; US National Science Foundation(AST-1358787) ; US National Science Foundation(AST-1358787) ; National Development and Reform Commission ; National Development and Reform Commission ; 11233004 ; 11233004 ; 2014CB845703) ; 2014CB845703) ; U1431106 ; U1431106 ; 11573035 ; 11573035 ; 11625313) ; 11625313)
源URL[http://ir.bao.ac.cn/handle/114a11/20068]  
专题国家天文台_光学天文研究部
作者单位1.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, Beijing 100012, Peoples R China
3.Embry Riddle Aeronaut Univ, 600 South Clyde Morris Blvd, Daytona Beach, FL 32114 USA
推荐引用方式
GB/T 7714		 Oswalt, T. D.,Zhang, L.,Chen, Y. Q.,et al. Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS[J]. ASTROPHYSICAL JOURNAL,2017,844(2).
APA Oswalt, T. D.,Zhang, L.,Chen, Y. Q.,Zhao, J. K.,Liang, X. L.,&Zhao, G..(2017).Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS.ASTROPHYSICAL JOURNAL,844(2).
MLA Oswalt, T. D.,et al."Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS".ASTROPHYSICAL JOURNAL 844.2(2017).

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来源：国家天文台

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