Table 1: Strömgren radii for PG 1034+001. The pure He models are calculated with $\log g\hspace{-0.5mm} =\hspace{-0.5mm} 7.5$ , $R_{\rm H~II}$ is calculated with an electron temperature $T_{\rm e} = 10~000 ~{\rm K}$ , an electron density $n_{\rm e} = 3 / {\rm cm^3}$ , and a volume filling factor of $\epsilon = 0.25$ , and $R = 0.0232 ~{R_\odot}$ .
$T_{\rm eff}$ / kK N_13.6 / cm² / s $R_{\rm H~II}$ / pc

90 $1.529\times 10^{26}$ 6.5

100 $2.076\times 10^{26}$ 7.2

120 $3.384\times 10^{26}$ 8.5

140 $5.088\times 10^{26}$ 9.8

160 $7.217\times 10^{26}$ 11.0

**Table 1:** Strömgren radii for PG 1034+001. The pure He models are calculated with $\log g\hspace{-0.5mm} =\hspace{-0.5mm} 7.5$ , $R_{\rm H~II}$ is calculated with an electron temperature $T_{\rm e} = 10~000 ~{\rm K}$ , an electron density $n_{\rm e} = 3 / {\rm cm^3}$ , and a volume filling factor of $\epsilon = 0.25$ , and $R = 0.0232 ~{R_\odot}$ .
$T_{\rm eff}$ / kK	N_13.6 / cm² / s	$R_{\rm H~II}$ / pc
90	$1.529\times 10^{26}$	6.5
100	$2.076\times 10^{26}$	7.2
120	$3.384\times 10^{26}$	8.5
140	$5.088\times 10^{26}$	9.8
160	$7.217\times 10^{26}$	11.0

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