Table 1
Extent of the heating penetrating of NGC 6611 on the two main filaments identified in the M 16 complex, determined from the dust temperature profiles (Fig. 5).
| Name | Colour | Column | Temper- | Penetration | Heating |
| density | ature | distance | gradient | ||
| ( × 1022 cm-2) | (K) | (pc) | (K/pc) | ||
| median | median | (heating) | (filaments) | ||
|
|
|||||
| E. Filament | green | 15 | 0.25 (0.23) | ||
| N. Filament | magenta | 10 | 0.63 (0.45) | ||
|
|
|||||
| M 16-N | green | 2.3 | 18.7 | 9 | 0.38 |
| P. of Creation | blue | 1.4 | 20.3 | 3 | flat |
| Spire | cyan | 1.9 | 19.7 | 6 | 0.24 |
| MYSO | magenta | 2.0 | 18.0 | 5 | 2.25∗ |
| M 16-E | red | 1.2 | 18.9 | – | – |
| M 16-NW | yellow | 1.2 | 17.2 | 9 | – |
Notes. The parameters of the column density and dust temperature derived from probability distribution functions (PDFs) for each sub-region in M 16 (Sect. B and Fig. B.1) as well as their heating distance and gradient are also given (Fig. C.1). The numbers given in parentheses in the last column is the value obtained when a de-screening has been applied (see Sect. 4.1). The asterisk here (∗) indicates that the heating gradient was taken over the steepest portion (3–5 pc), see Fig. C.1.
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