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Paper: Substructure in Bulk Velocities of Milky Way Disk Stars
Volume: 480, Structure and Dynamics of Disk Galaxies
Page: 19
Authors: Carlin, J. L.; DeLaunay, J.; Newberg, H. J.; Deng, L.; Gole, D.; Grabowski, K.; Jin, G.; Liu, C.; Liu, X.; Luo, A.-L.; Yuan, H.; Zhang, H.; Zhao, G.; Zhao, Y.
Abstract: We show that stars near the anticenter in the Galactic disk have bulk motions in both the vertical and radial directions that are unexpected for stars with disk-like kinematics. The asymmetries are present in independent data sets from the LAMOST and SDSS surveys that probe the same volume of the Galaxy. This substructure in the nearby disk is likely due to a perturbation by a passing dwarf galaxy or dark matter subhalo.
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