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Table 2
Physical parameters of the considered cloud cores.
| Source | v LSR | Δ v FWHM | d sou | T rot | N(CH3OCN) | Q rot | |
| (km s-1) | (km s-1) | (′′) | (K) | ×1014 (cm-2) | A state | E state | |
|
|
|||||||
| Orion KL | 8.0 6.0 |
3.0 8.0 |
3.0 3.0 |
150 150 |
≤(1.0 ± 0.3) ≤(1.0 ± 0.3) |
8823 8823 |
8825 8825 |
| (ALMA SV) | |||||||
| Hot core | |||||||
|
|
|||||||
| Orion KL | 7.5 | 2.0 | 3.0 | 100 | ≤(1.0 ± 0.3) | 5183 | 5185 |
| (ALMA SV) | |||||||
| Compact ridge | |||||||
|
|
|||||||
| Orion KL | 8.0 5.0 |
3.0 3.0 |
3.0 3.0 |
150 150 |
≤(1.0 ± 0.3) ≤(1.0 ± 0.3) |
8823 8823 |
8825 8825 |
| (ALMA SV) | |||||||
| MM4 | |||||||
|
|
|||||||
| Sgr B2(N) | 63.0 73.0 |
7.0 7.0 |
2.4 1.9 |
200 200 |
≤(100 ± 35) ≤(50 ± 20) |
12300 12300 |
12303 12303 |
| (IRAM 30 m) | |||||||
| Hot gas | |||||||
|
|
|||||||
| Sgr B2(N) | 64.0 75.0 |
9.0 12.0 |
60.0 60.0 |
14 14 |
≤(0.20 ± 0.06) ≤(0.20 ± 0.06) |
281 281 |
281 281 |
| (IRAM 30 m) | |||||||
| Cold gas | |||||||
|
|
|||||||
| B1-b | 6.7 | 0.7 | 60.0 | 12 | ≤(0.0020 ± 0.0006) | 223 | 223 |
| (IRAM 30 m) | |||||||
|
|
|||||||
| TMC-1 | 6.0 | 0.7 | 60.0 | 10 | ≤(0.0020 ± 0.0006) | 170 | 170 |
| (IRAM 30 m) | |||||||
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