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Table 5

Distribution of the regions in the classes defined in Sect. 5.3 as a function of the considered sample.

Class All Hα [O III] BPT
H II 29 986 (0.73) 23 939 (0.74) 14313 (0.65) 10 993 (0.73)
PNe 796 (0.02) 535 (0.02) 775 (0.04) 32 (0.00)
Sh. 6336 (0.15) 4454 (0.14) 4181 (0.19) 2356 (0.16)
Amb. 3722 (0.09) 3222 (0.10) 2556 (0.12) 1546 (0.10)
Un. 80 (0.00) 60 (0.00) 71 (0.00) 47 (0.00)
Total 40 920 32 210 21 896 14977

Notes. Next to the absolute number, we report the fraction of nebulae in that class with respect to the total.

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