Beyond Gaia DR3: Tracing the [α/M] – [M/H] bimodality from the inner to the outer Milky Way disc with Gaia-RVS and convolutional neural networks

Open Access

Fig. 4

Kiel diagram of the APOGEE DR17 input labels of the training sample (44780 stars) coloured by [M/H] (top) and in density plot fashion (bottom). Our training sample is clearly dominated by giants (77% of the sample has log(g) < 3.5), which is a direct effect of both the APOGEE and Gaia-RVS selection functions.

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