Volume 570, October 2014
|Number of page(s)||21|
|Published online||10 October 2014|
Total beam averaged column densities (in cm-2) for CO, HCO+, HCN, and CS derived using single transitions for a range of temperature assuming LTE and optically thin emission for the CND components, as well as for the SB ring.
Physical and chemical characteristics of the five selected sub-regions within the CND (see Fig. 6) as derived by a RADEX analysis of the CO emission only.
The seven sets of RADEX models using all available transitions. Columns 2–5 are the adopted column densities, in units of cm-2 where a(b) stands for a × 10b.
Physical and chemical characteristics of the five sub-regions within the CND as derived by a RADEX analysis of the all the available independent ratios, and using the lower limit of the gas density as derived by the CO RADEX fitting as a constraint.
Physical and chemical characteristics of the five sub-regions within the CND as derived by a RADEX analysis of only the high resolution ALMA ratios, and using the lower limit of the gas density as derived by the CO RADEX fitting as a constraint.
Grid of chemical models.
Summary of the best fit chemical model(s) for the molecular ratios as derived from the RADEX analysis in Sect. 3.2.2.
© ESO, 2014
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