The local standard of rest and the well in the velocity distribution

Abstract

It is now recognised that the traditional method of calculating the LSR fails. We find an improved estimate of the LSR by making use of the larger and more accurate database provided by XHIP and repeating our preferred analysis from Francis & Anderson (2009a). We confirm an unexpected high value of $U_0$ by calculating the mean for stars with orbits sufficiently inclined to the Galactic plane that they do not participate in bulk streaming motions. Our best estimate of the solar motion with respect to the LSR $(U_0,V_0,W_0)=(14.1\pm 1.1,14.6\pm 0.4,6.9\pm 0.1)$ km\ s${}^{-1}$.

Supplements and updates New Ast., 14, pp. 615-629 (arXiv:0812.4032) and AstL, 38, 5, 374-392 (arXiv:1108.4971)

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• Pulkovo Compilation of Radial Velocities for 35495 Hipparcos Stars in a Common System
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• Spatial Distribution and Kinematics of OB Stars
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• Calibration of RAVE distances to a large sample of Hipparcos stars
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