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Table 1
A summary of the methods used for the estimation of column density.
| Name | Description |
|
|
|
| Default | Modified black body fitting with single resolution data, Eq. (1) |
| A | Tdust at 36.3″ and Iν(250 μm) at 18.3″; Sect. 3.2, Juvela et al. (2012c) |
| B | N(500) + [N(350) − N(350 → 500)] + [N(250) − N(250 → 350)], Eq. (2), Palmeirim et al. (2013)1,2 |
| C | p1 × N(500) + p2 × [N(350) − N(350 → 500)] + p3 × [N(250) − N(250 → 350)]; see Sect. 3.4 |
| D | p1 × N(250 → 500) + p2 × N(350 → 500) + p3 × N(500); see Sect. 3.4 |
| NL | p1 × N(250 → 500) + p2 × N(350 → 500) + p3 × N(500) + p4 × [N(500) − N(250 → 500)]2; see Sect. 3.4 |
| RT | Radiative transfer modelling of surface brightness data; Sect. 3.5 |
Notes.1 N(λ) is the column density estimate obtained with surface brightness data at wavelengths from 160 μm to λ, at the resolution of the longest wavelength. 2 N(λ1 → λ2) is N(λ1) convolved to the resolution of observations at wavelength λ2.
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