Table 5
Physical conditions and cosmic ray ionisation rates.
| Pos. | Δv | nH2 | Tkin | N(C18O) | AV | N(H13CO+) | N(DCO+) |
|
ζ |
| [ km s-1] | [103 cm-3] | [K] | [1015 cm-2] | [mag] | [1012 cm-2] | [1012 cm-2] | [10-17 s-1] | ||
|
|
|||||||||
| N1 | 3.5 | 0.6 {0.2−1} | 15 ± 5 | 4 {2−6} | 21 {11−32} | 0.8−1.3 | <0.22 | <0.005 | >13 |
| N5 | 3.0 | 4 {2−5} | 10 ± 2 | 3 {2−8} | 16 {11−32} | 1.1−1.4 | 0.89−1.30 | 0.014−0.020 | 130−330 |
| N6 | 3.0 | 4 {2−6} | 13 ± 3 | 6 {4−20} | 32 {21−105} | 1.8−2.5 | 0.79−1.30 | 0.008−0.012 | 130−400 |
| N2 | 5.0 | > 2 | 16 ± 2 | 20 {15−30} | 105 {79−158} | 5.6−8.9 | 1.10−2.00 | 0.003−0.006 | − |
| N7 | 2.5 | 2 {2−5} | 10 ± 2 | 4 {3−10} | 21 {16−53} | 0.6−0.9 | <0.25 | <0.007 | >130 |
| N8 | 3.5 | 1 {0.6−2} | 8 ± 1 | 3 {2−4} | 16 {11−21} | <0.2 | <0.35 | − | − |
| N3 | 3.5 | 6 {4−10} | 8 ± 1 | 6 {5−7} | 32 {26−37} | 1.0−1.4 | <0.35 | <0.006 | >260 |
| N4 | 3.0 | 2 {0.6−4} | 12 ± 3 | 2 {2−3} | 11 {5−16} | 1.0−1.4 | <0.35 | <0.006 | >40 |
| SE1 | 4.0 | 2 {1−5} | 19 ± 5 | 6 {5−20} | 32 {26−105} | 0.4−0.56 | 0.79−1.0 | 0.032−0.05 | 0.2−20 |
| SE2 | 3.0 | 4 {2−10} | 8 ± 2 | 0.9 {0.4−20} | 5 {2−105} | <0.2 | <0.28 | − | − |
| SW2 | 1.5 | 2 {1−4} | 20 ± 4 | 4 {3−10} | 21 {16−53} | <0.1 | <0.22 | − | − |
| SW4† | 1.5 | 6 {4−10} | 16 ± 2 | 1.5 {1−3} | 5 {5−16} | 0.5−0.8 | <0.25 | <0.009 | − |
Notes. nH2 is the molecular hydrogen density (cm-3), Tkin the gas kinetic temperature, N(C18O) the total column density of C18O. AV is the visual extinction assuming [C18O] = AV × 1.9 1014 cm-2 (Frerking et al. 1982; Bolatto et al. 2013). We assumed isotopic ratio values 18O /16O = 500 and 13C /12C = 50 (see text). Values in brackets indicate the range of values satisfying 
. Uncertainties on nH2 and Tkin are at the 70% confidence level, and are propagated in the abundance ratios and upper limits. Lower limits of ζ were deduced from chemical modelling (see Sect. 6).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.