We revisit the moving groups (MGs) in the solar neighborhood with a sample of 91969 nearby stars constructed from LAMOST DR7. Using the wavelet technique and Monte Carlo simulations, five MGs together with a new candidate located at V≃ -130 km s−1 are detected simultaneously in V−U2+2V2 space. Taking into account the other known MGs, we conclude that MGs in the Galactic disk are spaced by approximately 15 ∼ 25 km s−1 along V velocity. The origin of detected MGs is analysed through the distributions of [Fe/H]−[Mg/Fe] and ages. Our results support attributing the origin to the continuous resonant mechanisms probably induced by the bar or spiral arms of the Milky Way.
@article{arxiv.2110.08061,
title = {Tracing the Origin of Moving Groups. III. Detecting Moving Groups in The LAMOST DR7},
author = {Yong Yang and Jingkun Zhao and Jiajun Zhang and Xianhao Ye and Gang Zhao},
journal= {arXiv preprint arXiv:2110.08061},
year = {2021}
}