Age-metallicity dependent stellar kinematics of the Milky Way disc from LAMOST and Gaia
Yaqian Wu,
Maosheng Xiang,
Yuqin Chen
et al.
Abstract:We investigate the stellar kinematics of the Galactic disc in 7 < R < 13 kpc using a sample of 118 945 red giant branch (RGB) stars from LAMOST and Gaia. We characterize the median, dispersion and skewness of the distributions of the 3D stellar velocities, actions and orbital parameters across the age-metallicity and the disc R -Z plane. Our results reveal abundant but clear stellar kinematic patterns and structures in the age -metallicity and the disc R -Z plane. The most prominent feature is the strong varia… Show more
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