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Article
Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS
The Astrophysical journal
  • X. L. Liang, Chinese Academy of Sciences
  • Terry Oswalt, Embry-Riddle Aeronautical University
  • J. K. Zhao, Chinese Academy of Sciences
  • Y. Q. Chen, Chinese Academy of Sciences
  • G. Zhao, Chinese Academy of Sciences
Submitting Campus
Daytona Beach
Department
Physical Sciences
Document Type
Article
Publication/Presentation Date
8-5-2017
Abstract/Description

We have cross-matched the LAMOST DR3 with the Gaia DR1 TGAS cata- logs 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 sig- nificant 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 descrip- tion of our analysis, we speculate on possible origins of our stream candidates.

DOI
https://doi.org/10.3847/1538-4357/aa7cf7
Publisher
The Institute of Physics
Grant or Award Name
National Natural Science Foundation of China grant Nos. 11390371, 11233004, U1431106, 11573035, 11625313, National Key Basic Research Program of China (973 program) 2014CB845701 and 2014CB845703, US National Science Foundation (AST-1358787)
Citation Information
X. L. Liang, Terry Oswalt, J. K. Zhao, Y. Q. Chen, et al.. "Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS" The Astrophysical journal Vol. 844 Iss. 2 (2017)
Available at: http://works.bepress.com/terry_d_oswalt/97/