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Table 2.
Mean and dispersion of observed and derived properties in the studied sample of He II emitters.
| Total | No WR | WR | |
|---|---|---|---|
| Number | 186 | 80 | 106 |
| log([O II]/[O III] | −0.44 (0.43) | −0.70 (0.33) | −0.27 (0.40) |
| log([S II]/[S III]) | −0.37 (0.17) | −0.38 (0.15) | −0.34 (0.18) |
| log(He I/He II) | 0.86 (0.25) | 0.84 (0.24) | 0.88 (0.26) |
| 12 + log(O/H) | 8.11 (0.26) | 7.94 (0.20) | 8.24 (0.23) |
| T* (kK) (a) | 61.9 (5.1) | 61.2 (5.0) | 62.4 (5.2) |
| log U(a) | −2.58 (0.28) | −2.46 (0.25) | −2.66 (0.28) |
| fabs(b) | 0.26 (0.10) | 0.28 (0.12) | 0.24 (0.08) |
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