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Fig. 9.


Rmax − zmax plane for stars in LP sample (black dots), compared to high-α (first row) and low-α stars (third row) of Gaia DR2-APOGEE sample. In the first and third rows, the left panel shows a zoom for stars with Rmax ≤ 20 kpc, the right panel the whole distribution. Second and fourth row: normalised histogram of the acrtangent of the ratio zmax/Rmax for high-α stars (blue histogram, second row), and low-α stars (yellow histogram, second row) in Gaia DR2-APOGEE. In both panels, the distribution is compared to that of the LP sample (black histogram).

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