By matching open-cluster orbital inclinations to the geometric warp, the authors infer a solar vertical velocity of 9.43 ± 0.16 km/s and a warp precession rate near zero, indicating a flattening Galactic disk.
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A Slowly Flattening Milky Way Stellar Disk: Investigating Galactic Warping through Dynamical Orbital Inclinations of Open Clusters
By matching open-cluster orbital inclinations to the geometric warp, the authors infer a solar vertical velocity of 9.43 ± 0.16 km/s and a warp precession rate near zero, indicating a flattening Galactic disk.