- Table 1:
- Table 2:
Source list and detection summary.
- Table 3:
Sources observed during the first observing run only. Columns 6-9
give the peak of each line or the rms level of the spectrum, both in K.
- Table 4:
Main physical parameters of our sources found in literature:
dust temperature (), H2 column and volume
and gas kinetic temperature (
references are shown between brackets.
- Table 5:
N2H+ line parameters.
- Table 6:
N2D+ line parameters.
- Table 7:
Deconvolved source angular diameters (in arcseconds) derived from
each tracer assuming a Gaussian source.
- Table 8:
Source properties derived from (sub-)mm continuum emission: deconvolved angular
), integrated 850 m continuum flux (,
for IRAS 18517+0437 we give the integrated 1.2 mm continuum flux), linear size (D),
gas+dust mass (
), visual extinction ()
H2 column and volume densities (
- Table 9:
N2H+ and N2D+ total column densities (
deuterium fractionation (
), and N2H+ chemical abundance relative to H2(
has been calculated from the molecular hydrogen column density
given in Col. 8 of Table 8.
- Table 10:
H2 volume densities and N2H+ and N2D+ column densities, derived
in the LVG approximation.
- Table 11:
Parameters used to determine the CO depletion factor: source Galactocentric
), "expected'' C17O abundance (
intensity of C17O at the dust peak position (
), beam filling factor
), C17O total column density (
observed C17O abundance (
and CO depletion factor ().