Table 1: Estimated values of t2, T0, and $\theta x^2$ for $T_{\rm c}=100$, 1000, and 4000 K for a sample of H II regions. $T_{0,{\rm E}}$ and $t^2_{\rm E}$ are taken from Esteban et al. (2002). The numbers in parentheses are values derived by GB05 and included here for comparison.
Object NGC 604 NGC 5461 NGC 5471 NGC 2363
$t^2_{\rm E}$ 0.027 0.041 0.074 0.128
$T_{0,{\rm E}}$ 8150 8600 14100 15700
T([O III])( $t^2_{\rm E}$, $T_{0,{\rm E}}$) 9052 9943 15 913 18 528
T(H I)( $t^2_{\rm E}$, $T_{0,{\rm E}}$) 7783 8011 12 358 12 344
(t2)100 0.00013 0.00016 0.00009 0.00013
(t2)1000 0.00413 0.00053 0.00312 0.00429
(t2)4000 0.02511 0.03503 0.02401 0.03540
(T0)100 9051 9941 15 911 18 526
(T0)1000 9011 9884 15 860 18 445
(T0)4000 8518 9370 15 413 17 719
$(\theta x^2)_{100}$ 0.00013(0.028) 0.00017(0.042) 0.00010(0.075) 0.00013(0.130)
$(\theta x^2)_{1000}$ 0.00522(0.035) 0.00659(0.052) 0.00356(0.086) 0.00480(0.146)
$(\theta x^2)_{4000}$ 0.08690(0.10) 0.10 664(0.14) 0.04378(0.14) 0.05905(0.23)

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