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We present a study of the kinematics of nearby (d ≲ 1.2 kpc) high-velocity K and M dwarfs and subdwarfs from the SUPERBLINK proper motion catalog (μ > 40 mas/yr), incorporating data from the second Gaia Data Release 2. All K and M stars were selected based on their GBP - GRP colors and absolute G magnitudes, and distances were calculated from Gaia parallaxes. We plot transverse velocities, vT, of stars in six different directions on the sky, to examine the distribution of local K and M stars in the (U, V, W) velocity space system. Our analysis suggests that the velocity space distribution of local thick disk and halo stars, much like the velocity-space distribution of disk stars, is inhomogeneous and shows the signature of at least one global "stream" consisting of stars drifting toward Galactic center.
{"references": ["Bensby et al., 2014, A&A, 562, 71", "Gaia Collaboration, 2016, A&A, 595, 1", "Gaia Collaboration, 2018b, arXiv:1804.09365", "Gaia Collaboration: A. Helmi, F. van Leeuwen, \nP. McMillan, et al., 2018, arXiv:1804.09381", "Helmi et al., 1999, Nature, 402, 53", "Lepine, S. & Shara, M. M., 2005, AJ, 129, 1483", "Lepine, S., 2005, AJ, 130, 1247", "Lepine, S. & Gaidos, E., 2011, AJ, 142, 138"]}
proper motions, stars: low-mass, Galaxy: kinematics and dynamics, Galaxy: halo
proper motions, stars: low-mass, Galaxy: kinematics and dynamics, Galaxy: halo
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