Period–radius diagram for all SB1 solutions falling along the RGB and AGB according to criterion (5), and with a radius available from radius_flame. The dashed lines correspond to the threshold periods expressed by Eq. (7) for ℳ₁ = 1.3 ℳ_⊙ and ℳ₂ = 1.0 ℳ_⊙ (red dashed line) and ℳ₁ = 1.3 ℳ_⊙ and ℳ₂ = 0.2 ℳ_⊙ (cyan dashed line). Left (a): unfiltered, 44 706 SB1 solutions (among which 3056 unphysical, that is, below the cyan dashed line). Middle (b): filtered by significance K₁/σ_K1 > 20, 27 404 solutions are rejected and 17 302 are kept (among which 214 unphysical). Right (c): filtered by significance > 40, 37 850 solutions are rejected and 6856 are kept (among which 21 unphysical).