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

Table 2

Optimal model threshold results for Youden’s index and F₁ score.

Model	Dataset	Threshold	Sensitivity	Specificity	Precision
Youden’s index
SOM	Binary	0.177	0.759	0.915	0.649
SOM	hot/He-rich	0.169	0.773	0.738	0.714
CNN	Binary	0.295	0.878	0.965	0.838
CNN	hot/He-rich	0.745	0.818	0.985	0.920
F₁ score
SOM	Binary	0.367	0.664	0.972	0.832
SOM	hot/He-rich	0.102	0.859	0.625	0.660
CNN	Binary	0.745	0.818	0.985	0.920
CNN	hot/He-rich	0.525	0.847	0.908	0.886

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