Abstract
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.
Original language | American English |
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Journal | The Astrophysical Journal |
Volume | 844 |
DOIs | |
State | Published - Aug 5 2017 |
Keywords
- Galaxy: kinematics and dynamics
Disciplines
- Stars, Interstellar Medium and the Galaxy