Table 2:

The parameters for the two ensembles in the PDR model in IRS1.

$\langle n_{\rm ens}\rangle$
$M_{\rm ens}$ $\chi$ [ $M_{\rm min}, M_{\rm max}$] N1 $f_{\rm V}$ fA2
(cm-3) ($M_\odot $) (Draine) ($M_\odot $)      
$1.8\times 10^6$ 14 $2.3\times 10^5$ [0.008, 7] 151 0.42-0.73 1.3
$1.3\times 10^6$ 54-250 27 [0.008, 27] 413-1913 0.07-0.34 0.6-2.6

Notes.  (1) Number of all clumps; (2) assuming hot clumps are situated approximately 7 $\hbox {$^{\prime \prime }$ }$ away from IRS1; $f_{\rm V}$ volume filling factor within a shell with $R_{\rm V,inner}=5\hbox{$^{\prime\prime}$ }$ and $R_{\rm V,outer}=11$-13 $\hbox {$^{\prime \prime }$ }$; $f_{\rm A}$ area filling factor with $R_{\rm A}=7\hbox{$^{\prime\prime}$ }$ for the hot component. For the cold component, $R_{\rm V,inner}=11$-13 $\hbox {$^{\prime \prime }$ }$, $R_{\rm V,outer}=40\hbox{$^{\prime\prime}$ }$, and $R_{\rm A}=40\hbox{$^{\prime\prime}$ }$.

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