Fig. 2

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Left: Toomre diagrams showing the kinematics of the uncleaned LAMOST-DR3 (top row) and APOGEE-DR17 (bottom row) catalogues, (blue/green distribution) with the stars satisfying λc > 0.9 and |z| < 0.3 kpc over-plotted with red markers. The inner and outer dashed curves represent the boundaries between the kinematically defined thin/thick discs and halo. Middle: Orbital anisotropy, β, of the cleaned sub-sample with errors determined via a bootstrapping method. The negative value of β indicates that the population is tangentially biased. Right: distribution of apparent Gaia G-band magnitude versus stellar age, τ⋆, for the cleaned sub-samples.
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