Free Access
Table 8
Diagnostic line ratios and physical parameters.
| Ratio | ETDa | CNDb | Nucleusc | Outflowd |
|
|
||||
| Ionised gas (HII regions) | ||||
| [N III]57 μm/[N II]122 μm | 0.9 | 0.3 | 1.0 | 1.1 |
| [N III]57 μm/[O III]88 μm | 0.45 | 0.1 | 0.3 | 0.5 |
| [N II]122 μm/[N II]205 μme | 0.9 | 2.9 | 1.0 | 0.9 |
| [O III]88 μm/[N II]122 μm | 2 | 2.5 | 3.2 | 2.1 |
| [O III]88 μm/[O I]63 μm | 0.5 | 0.4 | 0.09 | 1.1 |
| [C II]158 μm/[N II]122 μm | 24 | 8.8 | 21 | 12 |
| [C II]158 μm/[N II]205 μme | 22 | 25 | 22 | 11 |
|
|
||||
| Electron density ne ( cm-3) | 10 | 100 | 15 | 10 |
| Stellar temperature Teff (K) | 34 300 | 32 300 | 34 500 | 35 000 |
| Per centage [C II] from ionized zone | 7.5 | 10 | 12 | 25 |
| Metallicity Z (Z⊙) | 0.75 | 0.7 | 0.8 | 1 |
|
|
||||
| Neutral gas (PDRs) | ||||
| [C I]370 μm/[C I]609 μm | 3.8 | 3.0 | 3.0 | – |
| [C I]609 μm/CO(4–3) | 0.8 | 1.2 | 1.4 | 1.6 |
| [O I]63 μm/[O I]145 μm | 16 | 10 | 13 | >6 |
| [O I]63 μm/[C II]158 μm | 0.36 | 0.62 | 1.65 | 0.17 |
| [O I]63 μm+[C II]158 μm/FIR | 0.0040 | 0.0040 | 0.0095 | 0.0090 |
| [C II]158 μm/FIR | 0.0025 | 0.0030 | 0.0035 | 0.0070 |
|
|
||||
| PDR gas density log no ( cm-3) | 3.5 ± 0.7 | 4.3 ± 0.2 | 4.4 ± 0.3 | 3.6 ±0.21 |
| PDR radiation field G (Go) | 40 ± 10 | 4.0 ± 0.5 | 4.5 ± 0.5 | 130 ± 60 |
| PDR surface temperature Ts (K) | 70 ± 10 | 50 ± 5 | 40 ± 5 | 160 ± 20 |
| τOI | 0.5 ± 0.1 | 1.5 ± 0.3 | 1.0 ± 0.2 | – |
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.