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. 9

Gaia RVS spectral sensitivity maps of CNN. Top: mean RVS spectra of training sample RC stars with [M/H] ~ 0. In the next sub-panels, we show the mean gradients of the CNN output labels with respect to the input RVS pixels for T_eff, log(g), [M/H], and [α/M] (δlabel/δλ). The vertical coloured lines show the location of the main RVS spectral features from which CNN learns (see Sect. 3.5.1).

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