Stars used for transfer learning to re-train the networks that were pre-trained on the m12i catalogs from FIRE. The points marked in orange have |z| > 1.5 kpc and [Fe/H] < −1.5 and are labeled as accreted for the training. The remaining stars are marked as in situ during the training step. Due to the large sample size, the stars labeled as in situ are displayed as a density plot, where the darker bins have a larger number of stars. The HR diagram in the lower right panel does not take into account the extinction and reddening (Gaia Collaboration et al. 2018b).
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