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.
The Astrophysical journal
The Institute of Physics
Scholarly Commons Citation
Liang, X. L., Oswalt, T., Zhao, J. K., Chen, Y. Q., & Zhao, G. (2017). Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS. The Astrophysical journal, 844(2). https://doi.org/10.3847/1538-4357/aa7cf7