Table 3
Parameters of the detected molecular transitions.
| Species | Transition | Frequency (a) | Aij (a) | Eu (a) | ncrit (b) |
|---|---|---|---|---|---|
| (GHz) | (s−1) | (K) | (cm−3) | ||
| CO-species | |||||
| CO | J = 2−1 | 230.53800 | 6.92 × 10−7 | 17 | 2.2 × 104 |
| 13CO | J = 2−1 | 220.39868 | 6.07 × 10−7 | 16 | 2.0 × 104 |
| C18O | J = 2−1 | 219.56035 | 6.01 × 10−7 | 16 | 1.9 × 104 |
| C17O | J = 2−1 | 224.71439 | 6.42 × 10−7 | 16 | 2.1 × 104 |
| H2CO | 30,3 − 20,2 (para) | 218.22219 | 2.82 × 10−4 | 21 | 3.4 × 106 |
| H2CO | 32,2 − 22,1 (para) | 218.47563 | 1.58 × 10−4 | 68 | 1.4 × 106 |
| H2CO | 32,1 − 22,0 (para) | 218.76007 | 1.58 × 10−4 | 68 | 3.2 × 106 |
| H2CO | 31,2 − 21,1 (ortho) | 225.69778 | 2.75 × 10−4 | 33 | 5.7 × 106 |
| Deuterated species | |||||
| DCO+ | J = 3−2 | 216.11258 | 2.38 × 10−3 | 21 | 7.0 × 106 |
| DCN | 3−2 | 217.23854 | 4.57 × 10−4 | 21 | 2.5 × 107 |
| DNC | 3−2 | 228.91049 | 5.62 × 10−4 | 22 | 4.9 × 106 |
| S-species | |||||
| CS | 5−4 | 244.93556 | 2.95 × 10−4 | 35 | 8.7 × 106 |
| C34S | 5−4 | 241.01609 | 2.75 × 10−4 | 28 | 8.0 × 106 |
| 13CS | 5−4 | 231.22069 | 2.51 × 10−4 | 33 | 7.4 × 106 |
| SO | 55 − 44 | 215.22065 | 1.20 × 10−4 | 44 | 1.8 × 108 (c) |
| SO | 65 − 54 | 219.94944 | 1.35 × 10−4 | 35 | 2.5 × 108 (c) |
| N-species | |||||
| CN (d) | N = 2−1, J = 3/2−3/2, F = 1/2−1/2 | 226.28742 | 1.02 × 10−5 | 16 | 6.1 × 104 |
| CN | N = 2−1, J = 3/2−3/2, F = 5/2−5/2 | 226.35987 | 1.62 × 10−5 | 16 | 5.8 × 105 |
| CN | N = 2−1, J = 3/2−1/2, F = 1/2−3/2 | 226.61657 | 1.07 × 10−5 | 16 | 1.8 × 105 |
| CN | N = 2−1, J = 3/2−1/2, F = 3/2−3/2 | 226.63219 | 4.27 × 10−5 | 16 | 2.6 × 105 |
| CN | N = 2−1, J=3/2−1/2, F = 5/2−3/2 | 226.65956 | 9.55 × 10−5 | 16 | 7.0 × 105 |
| CN | N = 2−1, J = 3/2−1/2, F = 1/2−1/2 | 226.66369 | 8.51 × 10−5 | 16 | 6.0 × 105 |
| CN | N = 2−1, J = 3/2−1/2, F = 3/2−1/2 | 226.67931 | 5.25 × 10−5 | 16 | 3.8 × 105 |
| CN | N = 2−1, J = 5/2−3/2, F = 5/2−3/2 | 226.87419 | 9.55 × 10−5 | 16 | 2.4 × 106 |
| CN | N = 2−1, J = 5/2−3/2, F = 7/2−5/2 | 226.87478 | 1.15 × 10−4 | 16 | 5.1 × 107 |
| CN | N = 2−1, J = 5/2−3/2, F = 3/2−1/2 | 226.87590 | 8.51 × 10−5 | 16 | 1.2 × 106 |
| CN | N = 2−1, J = 5/2−3/2, F = 3/2−3/2 | 226.88742 | 2.75 × 10−5 | 16 | 9.5 × 105 |
| CN | N = 2−1, J = 5/2−3/2, F = 5/2−5/2 | 226.89213 | 1.82 × 10−5 | 16 | 5.4 × 105 |
| 13 CN | N = 2−1, J = 5/2−3/2, F = 4−3 | 217.46715 | 1.01 × 10−4 | 16 | |
| Carbon-chain species | |||||
| c-C3 H2 | 33,0 − 22,1 (ortho) | 216.27876 | 2.57 × 10−4 | 19 | 2.0 × 108 |
| c-C3 H2 | 60,6 − 51,5 (para) | 217.82215 | 5.37 × 10−4 | 39 | 8.7 × 107 |
| c-C3 H2 | 51,4 − 42,3 (ortho) | 217.94005 | 3.98 × 10−4 | 35 | 6.3 × 107 |
| c-C3 H2 | 52,4 − 41,3 (para) | 218.16046 | 4.07 × 10−4 | 35 | 9.0 × 107 |
| c-C3 H2 | 72,6 − 71,7 (para) | 218.73273 | 8.91 × 10−5 | 61 | 2.9 × 107 |
| c-C3 H2 | 43,2 − 32,1 (ortho) | 227.16914 | 3.09 × 10−4 | 29 | 2.8 × 107 |
| HC3 N | J = 24−23 | 218.32472 | 8.32 × 10−4 | 131 | 4.7 × 107 |
| HC3 N | J = 25−24 | 227.41891 | 9.33 × 10−4 | 142 | 1.2 × 107 |
| HC3 N | J = 26−25 | 236.51279 | 1.05 × 10−3 | 153 | 3.2 × 107 |
Notes. (a) Values from the CDMS database (Müller et al. 2001). (b)Calculated values for a collisional temperature of 30 K and collisional rates from the Leiden Atomic and Molecular Database (LAMDA; Schöier et al. 2005). (c) For a collisional temperature of 60 K. (d)CN transitions with Aij higher than 1 × 10−5 s−1. The references for collisional rates of specific species are presented in Table B.1.
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