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Table 3:

LTE column densities.

Source 		$T_{\rm r}$ N(C18O) N(C17O) R1* $T_{\rm r}$ (K) N(N2H+) N(N2D+) R2*
  (K) (cm-2) (cm-2)   (K) (cm-2) (cm-2)  

Serpens-FIRS 1 		11 8.2 $\times$ 1015 3.2 $\times$ 1015 2.6 11a 7.7 $\times$ 1013 3.4 $\times$ 1011 0.004
Cep E-mm 15 2.5 $\times$ 1015 7.6 $\times$ 1014 3.3 9b 1.4 $\times$ 1013 5.8 $\times$ 1011 0.04
L1641 S3 MMS 1 10 3.2 $\times$ 1015 1.3 $\times$ 1015 2.5 8b 3.6 $\times$ 1013 <2.1 $\times$ 1011 <0.006
IC1396N 25 1.1 $\times$ 1016 3.7 $\times$ 1015 3.0 10b 4.1 $\times$ 1013 <4.1 $\times$ 1011 <0.01
CB3 14 5.2 $\times$ 1015 1.6 $\times$ 1015 3.3 6a 1.2 $\times$ 1013 1.0 $\times$ 1012 0.08
OMC2-FIR4 22 4.8 $\times$ 1015 1.2 $\times$ 10 15 3.4 22a 2.0 $\times$ 1014 8.7 $\times$ 1011 0.004
NGC 7129-FIRS 2 23 1.9 $\times$ 1015 6.9 $\times$ 1014 2.8 13c 3.8 $\times$ 1013 5.4 $\times$ 1011 0.014
S140 50c 1.0 $\times$ 1016 2.7 $\times$ 1015 3.7 50d 1.2 $\times$ 1014 <4.5 $\times$ 1011 <0.004
LkH$\alpha $ 234b         22 1.0 $\times$ 1013 <2.3 $\times$ 1011 <0.02

Notes. (*) R1=N(C18O)/N(C17O), R2=N(N2D+)/N(N2H+).
(a) Rotation temperature derived from our N2D+ observations.
(b) Rotation temperature derived from our N2H+ observations.
(c) From Fuente et al. (2005a).
(d) From Minchin et al. (1995).


Source LaTeX | All tables | In the text

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