Fig. 3.
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MW disk separation in the feature space (jz/jc,[O/Fe]) using Gaussian Mixture clustering with two components. The observational data are a subsample of the stars in Hogg et al. (2019) for which the circularity parameter jz/jc could be estimated. We approximate jc ≅ VcR, where Vc is the circular velocity at the radial position R of the star in the galactic plane, and Vc(R) is taken from Eilers et al. (2019).
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