Mass segregation ratio of cores in the W43-MM2&MM3 subregions. Computed from Eq. (7), they are measured in the MM2 and MM51 subregions (panel a), in MM10 and MM12 (panel b), and in MM3 (panel c). Error bars are the ±1σ uncertainties. Right arrows and vertical dashed lines locate the 90% completeness levels of the subregion catalogs of cores (see Table 2). Values well above Λ_msr ≃ 1 (dashed black horizontal line) strongly suggest mass segregation in MM2, MM3, and MM10 (see Table 3).