... envelopes[*]
Figures 11-14 and Tables 9-12 are only available in electronic form at http://www.aanda.org
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... Observatory[*]
See http://herschel.esac.esa.int/
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...Faure et al. 2007)[*]
The rate coefficients from Faure et al. (2007) only became available once most of the models had been run, but those new calculations often do not include a wide enough range of temperatures or the higher excited energy levels, needed for the analysis of YSOs. Test models using different published rate coefficients show that absolute line fluxes may differ up to 30% (Poelman & van der Tak 2007). Even greater differences are found at low temperatures (T < 20 K) and densities (n(H2)<104 cm-3) for the ground-state line intensities and profiles (e.g. Poelman & Spaans 2005; Dubernet et al. 2006). However, the general trends found in this paper remain valid for different rate coefficients.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... test[*]
See http://www.sron.rug.nl/vdtak/H2O/
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
...-2[*]
Calculated with Hspot, see http://herschel.esac.esa.int/
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... SWAS[*]
See http://cfa-www.harvard.edu/swas/ for more information.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
... archive[*]
See http://lambda.gsfc.nasa.gov/product/swas/ for more information.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Copyright ESO 2008