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Table 4:

Summary of the dust radiative transfer analysis for the five IM protostars.

Fixed input parameters 		         
Stellar temperature, $T_{\star}$ 5000 K          
Dust temperature at $r_{\rm in}$, $T_{\rm in}$ 300 K          
Dust opacity (OH5) at 100 $\mu $m, $\kappa_{100}$ 86.5 cm2 g-1          
Bestfit parameters & physical quantities          
Source CB3 Cep E IC1396 N NGC7129 Serpens OMC2
  mm mm BIMA2 FIRS 2 FIRS 1 FIR4
Distance, (${\rm pc}$) 2500 730 750 1250 230 450
Luminosity, ( ${L}_{\hbox{$\odot$ }}$) 1000 100 150 500 33 1000
Dust optical depth at 100 $\mu $m, $\tau _{100}$ 5.8 5.0 1.4 2.3 3.0 0.6
Density power law index, $\alpha $ 2.2 1.9 1.2 1.4 1.5 0.6
Envelope thickness, Y (= $r_{\rm out}$/ $r_{\rm in}$) 400 500 630 180 200 120
$\chi ^{2}_{\rm red}$-maps 0.43 0.11 0.55 0.21 0.20 1.2
$\chi ^{2}_{\rm red}$-SED 0.85 0.80 1.2 0.87 4.4 0.55
Inner envelope radius, $r_{\rm in}$, (${\rm AU}$) 260 70 50 100 30 100
Outer envelope radius, $r_{\rm out}$, (${\rm AU}$) 103 000 35 800 29 600 18 600 5900 12 000
Radius at $T_{\rm dust} = 100$ K, $r_{{\rm 100~K}}$, (${\rm AU}$) 700 223 180 373 102 440
H2 density at $r_{100~{\rm K}}$, n0, (cm-3) $7.5\times10^{7}$ $2.0 \times 10^{8}$ $4.3 \times 10^{7}$ $4.4 \times 10^{7}$ $2.2 \times 10^{8}$ $4.3 \times 10^{6}$
Envelope mass, $M_{\rm env}$, ( $M_{\hbox{$\odot$ }}$) 120 35 90 50 5.0 30
( $T_{\rm dust}$- $T_{\rm gas}$)$_{\max}$, (K) 6 5 40 40 10 150

Notes. The top section lists the fixed input parameters, the lower section reports the best-fit parameters, and some relevant physical quantities corresponding to the best-fit model. The last column reports the same parameters for the IM protostar OMC2-FIR4, found with a similar analysis (Crimier et al. 2009), for comparison.


Source LaTeX | All tables | In the text

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