Table 4
Radiative transfer results.
| T kin | log10(nH2) | log10(P) | log10(ΦA) | log10(⟨ ⟩) |
log10(MH2) | α CO | [12CO]/[13CO] | [12CO]/[C18O] | ||
| (K) | (cm-3) | (K cm-3) | (cm-2) | (M⊙) | (M⊙ (K km s-1 pc2)-1) | |||||
| [1] | [2] | [3] | [4] | [5] | [6] | [7] | [8] | [9] | [10] | |
|
|
||||||||||
| Arp 220C | Mean | 130 | 2.99 | 5.2 | –0.30 | 19.33 | 8.81 | 0.4 | 125 | 125 |
| Best Fit | 38 | 3.35 | 4.9 | –0.036 | 19.20 | 8.69 | 0.3 | 90 | 91 | |
| –1σ Value | 37 | 2.55 | 4.9 | –0.53 | 18.97 | 8.46 | 0.2 | 58 | 56 | |
| +1σ Value | 690 | 3.40 | 5.4 | –0.074 | 19.74 | 9.23 | 1.0 | 309 | 323 | |
|
|
||||||||||
| Arp 220E | Mean | 240 | 2.54 | 4.9 | –0.22 | 19.04 | 8.53 | 0.4 | 93 | 93 |
| Best Fit | 34 | 3.10 | 4.6 | –0.017 | 19.24 | 8.73 | 0.6 | 159 | 159 | |
| –1σ Value | 10 | 2.8 | 4.3 | –0.17 | 19.03 | 8.52 | 0.4 | 100 | 100 | |
| +1σ Value | 110 | 3.4 | 4.9 | 0.0 | 19.45 | 8.94 | 1.0 | 255 | 255 | |
|
|
||||||||||
| Arp 220W | Mean | 105 | 3.78 | 5.8 | –0.32 | 19.36 | 8.85 | 0.5 | 151 | 149 |
| Best Fit | 300 | 3.2 | 5.7 | –0.7 | 19.34 | 8.83 | 0.5 | 142 | 143 | |
| –1σ Value | 90 | 2.3 | 5.0 | –0.91 | 18.96 | 8.45 | 0.2 | 62 | 62 | |
| +1σ Value | 1000 | 4.1 | 6.3 | –0.48 | 19.71 | 9.20 | 1.1 | 330 | 330 | |
Notes. Column [1]: statistic; Col. [2] kinetic temperature; Col. [3] volume density; Col. [4]: thermal pressure Col. [5]: filling factor; Col. [6]: 12CO column density; Col. [7]: molecular gas (H2) mass assuming [12CO]/[H2] = 3 × 10-4; Col. [8]: conversion factor αCO = 1.36 MH2/LCO; factor of 1.36 is to account for He; Col. [9]: [12CO]/[13CO] abundance ratio; Col. [10]: [12CO]/[C18O] abundance ratio; the ± σ values denote the range of values within 1σ.
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