Table 1
Parameters of the transitions used in this research.
| Rest Freq. | Transition | E u | A ul |
|
| (MHz) | QNs | (K) | (s-1) | (K km s-1) |
|
|
||||
| H12CO+μ = 3.888 Debyes | ||||
| 89 188.5 | 1−0 | 4.3 | 4.161E-05 | 4.56 (0.05) |
| 267 557.6 | 3−2 | 25.7 | 1.444E-03 | 9.1 (0.30)* |
| 535 061.6 | 6−5 | 89.9 | 1.244E-02 | 0.15†(0.05) |
| 624 208.4 | 7−6 | 119.8 | 1.997E-02 | <0.11 |
| H13CO+μ = 3.888 Debyes | ||||
| 86 754.3 | 1−0 | 4.2 | 3.829E-05 | 0.50 (0.05) |
| 260 255.3 | 3−2 | 25.0 | 1.329E-03 | 1.85 (0.11) |
| 346 998.3 | 4−3 | 41.6 | 3.267E-03 | 0.76 (0.10) |
| 520 459.9 | 6−5 | 87.4 | 1.145E-02 | <0.11 |
| SO+μ = 2.3 Debyes | ||||
| 162 198.6 | 7/2−5/2(e) | 16.7 | 1.108E-04 | 0.64 (0.04) |
| 208 965.4 | 9/2−7/2(f) | 26.8 | 2.457E-04 | 0.50 (0.08) |
| 254 977.9 | 11/2−9/2(e) | 38.9 | 4.566E-04 | 0.55 (0.15) |
| 301 361.5 | 13/2−11/2(e) | 53.4 | 7.655E-04 | <0.15 |
| 301 736.8 | 13/2−11/2(f) | 53.5 | 7.684E-04 | <0.15 |
| 347 740.0 | 15/2−13/2(e) | 70.1 | 1.189E-03 | 0.25†(0.15) |
| 348 115.2 | 15/2−13/2(f) | 70.2 | 1.193E-03 | <0.17 |
| 486 837.2 | 20/2−18/2(f) | 133.5 | 3.330E-03 | <0.11 |
| 487 212.1 | 20/2−18/2(e) | 133.7 | 3.338E-03 | <0.11 |
| N2H+μ = 3.4 Debyes | ||||
| 93 173.1 | 1−0 | 4.5 | 3.628E-05 | 0.54 (0.04) |
| 279 510.8 | 3−2 | 26.8 | 1.259E-03 | 1.17 (0.10) |
| 558 965.1 | 6−5 | 93.9 | 1.085E-02 | <0.12 |
| 652 094.2 | 7−6 | 125.2 | 1.741E-02 | <0.14 |
| H3O+μ = 1.44 Debyes | ||||
| 30 7192.4 | 1 −2 |
79.5 | 3.498E-04 | 0.28 (0.09) |
| 984 708.7 | 0 −1 |
54.6 | 2.305E-02 | 0.40†(0.20) |
| 1 031 299.5 | 4 −3 |
232.2 | 5.148E-03 | <0.31 |
| 1 069 827.6 | 4 −3 |
268.8 | 9.850E-03 | <0.23 |
Notes. The table includes: 1) rest frequency (MHz); 2) rotational quantum numbers; 3) upper level energy (Eu); 4) spontaneous emission Einstein’s coefficient (Aul); and 5) integrated intensity or line flux (
) and its error (within parenthesis); for nondetections, we provide 3σ-upper limits to the line flux adopting a spectral window of 30 km s-1, except for H3O+ for which we use 12 km s-1 (see Sect. 3.4). The permanent dipole moment (μ) of the ions are also indicated.
Flux after removing the contribution of the SO2 line (~50%, see Sect. 3.1).
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