Millions of main-sequence binary stars from Gaia BP/RP spectra

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Table 2

Selection criteria for the golden binary sample.

Criterion	Description
Predicted_class = 1	Binary classification that passes the χ² threshold in Subsection 5.2
$\log_{10} (χ_{single}^{2} / χ_{binary}^{2}) > 0.2$ ${\log _{10}}\left( {\chi _{{\rm{single\;}}}^2/\chi _{{\rm{binary\;}}}^2} \right) > 0.2$	χ² improvement for binary fit
$χ_{single}^{2} / Dof < 3 \lor χ_{binary}^{2} / Dof < 3$ $\chi _{{\rm{single\;}}}^2/{\rm{Dof}} < 3 \vee \chi _{{\rm{binary\;}}}^2/{\rm{Dof}} < 3$	Good fit quality (either single or binary model)
fit_status_single ≥ 2 ∨ fit_status_binary ≥ 2	Successful convergence (either single or binary model)
m₁ < 1.0 M_⊙	Primary mass cut
[M/H]_phot> -1	[M/H]_phot cut
M_G ≥ 4.5	Absolute magnitude cut
E_binary < 0.2	Extinction cut
0.4 ≤ q ≤ 1.0	Mass-ratio cut
0.2 ≤ flux_ratio_mean ≤ 1.0	Flux-ratio cut
`flag_extrap_m2` == False	Secondary mass cut (m₂ > 0.1)

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