2021ApJ...922..105Y

We revisit the moving groups (MGs) in the solar neighborhood with a sample of 91,969 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-\sqrtU²+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 analyzed 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.