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Home All issues Volume 494 / No 2 (February I 2009) A&A, 494 2 (2009) 623-636 Full HTML
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Table 1:

Line parameters from the JCMT and CSO observations. The positions are offsets to the dust peak emission at $\alpha _{2000}$ = $\rm 15^h54^m08\hbox{$.\!\!^{\rm s}$ }50$, $\delta _{2000}$ = $-02^\circ 52^\prime 48^{\prime \prime }$. For non-detected lines we give the 3$\sigma $ upper limit. For JCMT and p-D2H+ at CSO, we give both the Monte Carlo (MC) and the LTE column density estimates.
        JCMT      
Position rms $\delta v$ $\Delta v$ Ta* N(o-H2D+) $^{a,b}_{\rm MC}$ N(o-H2D+) $^{b}_{\rm LTE}$ tau $^{b}_{\rm LTE}$
( $^{\prime \prime }$) (K) km s-1 km s-1 K cm-2 cm-2  
(-45, 0) 0.08 0.049 0.3 0.11 3.6 $\times $ 1012 2.9 $\times $ 1012 0.11
(-30, 0) 0.08 0.049 0.26 0.28 8.1 $\times $ 1012 8.1 $\times $ 1012 0.31
(-15, 0) 0.09 0.049 0.51 0.41 2.0 $\times $ 1013 1.3 $\times $ 1013 0.49
(0, 0) 0.09 0.049 0.41 0.57 2.3 $\times $ 1013 2.0 $\times $ 1013 0.77
(15, 0) 0.08 0.049 0.47 0.46 2.0 $\times $ 1013 1.5 $\times $ 1013 0.57
(30, 0) 0.08 0.049 0.39 0.21 8.1 $\times $ 1012 5.7 $\times $ 1012 0.22
(45, 0) 0.08 0.049 0.50 0.13 3.6 $\times $ 1012 3.4 $\times $ 1012 0.13
(60, 0) 0.08 0.049   <0.06 <1.8 $\times $ 1012 <1.6 $\times $ 1012 <0.06
        CSO      
Position rms $\delta v$ $\Delta v$ Ta*   N(o-H2D+) $^{b}_{\rm LTE}$ tau $^{b}_{\rm LTE}$
( $^{\prime \prime }$) (K) km s-1 km s-1 K   cm-2  
(0, 130) 0.08 0.077   <0.1   <3.0 $\times $ 1012 <0.1
(0, 110) 0.08 0.039 0.50 0.25   8.0 $\times $ 1012 0.28
(0, 90) 0.08 0.039 0.43 0.36   1.0 $\times $ 1013 0.42
(0, 70) 0.08 0.039 0.40 0.39   1.1 $\times $ 1013 0.47
(0, 50) 0.10 0.039 0.36 0.64   2.0 $\times $ 1013 0.95
(0, 30) 0.08 0.039 0.50 0.48   1.8 $\times $ 1013 0.63
(0, 0) 0.10 0.039 0.41 0.66   2.4 $\times $ 1013 1.00
(0, -20) 0.06 0.039 0.56 0.33   1.2 $\times $ 1013 0.38
(0, -40) 0.10 0.039 0.48 0.30   9.5 $\times $ 1012 0.34
Position rms $\delta v$ $\Delta v$ Ta* N(p-D2H+) $^{c}_{\rm MC}$ N(p-D2H+) $^{c}_{\rm LTE}$ tau $^{c}_{\rm LTE}$
( $^{\prime \prime }$) (K) km s-1 km s-1 K cm-2 cm-2  
(0, 0) 0.07 0.042   <0.07 <2.4 $\times $ 1013 <1.5 $\times $ 1013 <0.48
a Column densities have been computed after averaging spectra at symmetrical distances from center.
b Column densities and opacities have been computed with a beam coupling correction of 70% for both JCMT and CSO.
c Upper limit column density and opacity have been computed with a beam coupling correction of 60% at CSO.

Source LaTeX | All tables | In the text

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