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Table 2

Set of parameters and range used in the ABC-MCMC process.

Component Parameter min max

Solar motion
U 0. 20.
V 0. 30.
W 0. 20.
Vertex deviation
V D a − 1 1
V D b − 1 1

Thin disk
A 4 60
B 0 60
C 0.5 0.5
σ V / σ U 0.3 1.
σ W / σ U 0.3 1.
h σ U 1 25.
h σ W 1 25.

Thick disk
σ U 25. 80.
σ V 25. 80
σ W 25. 80

Old thick disk
σ U 25. 80
σ V 25. 80
σ W 25. 80

Notes. Units are km s-1 for velocities and radian for the vertex deviation. Thin-disk parameters A–C are the coefficients of the formula describing the evolution of σW with time (see text). The vertex deviation is for ages younger (VDa) and older (VDb) than 1 Gyr, and the scale lengths are given in kpc. Velocities and velocity dispersions are all given in km s-1.

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