Fig. 2.

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Distributions of galactocentric velocities (v = |v|, top row) and peculiar velocities in the local standard of rest of the point mass (vLSR, bottom row) for the simulated point masses. For the first 20 Myr, we evaluated the velocities every 1 Myr and show the total, normalised distribution in histograms with a bin width of 20 km s−1 (light blue curves). After 20 Myr, we evaluated the velocities every 10 Myr and also show the total, normalised distribution in similar histograms (dark blue curves). The dashed black curves show the kick distribution (i.e. a Maxwellian with σ = 265 km s−1, as used by Hobbs et al. 2005). The three panels show the evaluated velocities for the three populations: the solar neighbourhood (left), the thick disc (centre), and the total population (right). These populations have sizes of 24 817, 144 496, and 210 000 for ages below 20 Myr, and 7079, 54 320, and 180 000 for ages above 20 Myr, respectively.
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