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Table 12:

Estimates of the post-shock photoionized region thickness $l_{\rm PSPIR}$ from several fine-structure line ratios to the 5007 Å line.
Spectral line $\varepsilon$, erg cm3/s n(ion)/n(elem) $l_{\rm PSPIR}$, cm
[O I] 63.19 $\mu $m $1.2\times10^{-24}$ 0.94 $1.2\times10^{11}$
[Si II] 34.81 $\mu $m $1.3\times10^{-23}$ 1.0 $2.1\times10^{11}$
[Ar II] 6.985 $\mu $m $2.0\times10^{-21}$ 0.4 $2.0\times10^{11}$
[Fe II] 17.94 $\mu $m $4.0\times10^{-23}$ 1.0 $3.0\times10^{11}$
O I 7774 Å $1.3\times10^{-24}$ 0.06 $8.0\times10^{10}$

Notes: estimates made for post-shock PIR electron density $n_{\rm e} = 5 \times 10^5$ cm-3 and temperature $T_{\rm e}=1500$ K. Oxygen abundance have been taken to be $n_{\rm O}/n_{\rm t}=0.6$ (see Sect. 5.3), other abundances as in Table 9.


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