Detection of hot subdwarf binaries and He-poor hot subdwarf stars using machine learning methods and a large sample of Gaia XP spectra

Open Access

Fig. A.4

Network gradients for the classification of sdB stars. Top panel: Mean spectra of the classes sdB (red) and hot/He-rich (blue) in the CNN training set. Bottom panel: Network gradients for the class sdB. In both panels, dashed vertical lines show the positions of the 410, 434, 486 nm Balmer absorption lines of hydrogen.

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