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Table 1
Species and transitions observed with Herschel-HIFI containing the offset component.
| Transition | ν | λ | Eu/kB | A | Beama | tintb | ηMBa | Sources |
| (GHz) | (μm) | (K) | (s-1) | (′′) | (min.) | |||
|
|
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| H2O 110–101 | 556.94 | 538.29 | 61.0 | 3.46(–3) | 38.1 | 13.0 | 0.75 | IRAS 2A, IRAS 3A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 212–101 | 1669.90 | 179.53 | 114.4 | 5.59(–2) | 12.7 | 23.7 | 0.71 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 111–000 | 1113.34 | 269.27 | 53.4 | 1.84(–2) | 19.0 | 43.5 | 0.74 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 202–111 | 987.93 | 303.46 | 100.8 | 5.84(–3) | 21.5 | 23.3 | 0.74 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 211–202 | 752.03 | 398.64 | 136.9 | 7.06(–3) | 28.2 | 18.4 | 0.75 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 312–303 | 1097.37 | 273.19 | 249.4 | 1.65(–2) | 19.7 | 32.5 | 0.74 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 312–221 | 1153.13 | 259.98 | 249.4 | 2.63(–3) | 18.4 | 13.0 | 0.64 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
|
|
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| CO 10–9 | 1151.99 | 260.24 | 304.1 | 1.00(–4) | 18.4 | 13.0 | 0.64 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| 16–15 | 1841.35 | 162.81 | 751.7 | 4.05(–4) | 11.5 | 44.6 | 0.70 | SMM1 |
|
|
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| CH+ 1–0 | 835.14 | 358.97 | 40.1 | 2.3(–3) | 25.4 | 15.6 | 0.75 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1 |
| OH+ 1–0c | 1033.12 | 290.18 | 49.6 | 1.8(–2) | 20.5 | 30.1 | 0.74 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1 |
| C+ 2–1 | 1900.54 | 157.74 | 91.2 | 2.30(–6) | 11.2 | 15.8 | 0.69 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1 |
| HCO+ 6–5 | 535.06 | 560.30 | 89.9 | 1.27(–2) | 39.6 | 43.7 | 0.75 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| CH c | 536.76 | 558.52 | 25.8 | 6.80(–4) | 39.6 | 43.7 | 0.75 | IRAS 2A, IRAS 4A, IRAS 4B, SMM1, SMM3 |
| OH c | 1834.75 | 163.40 | 269.8 | 2.12(–2) | 11.6 | 44.6 | 0.70 | SMM1 |
Notes. For lines with hyperfine splitting (OH and OH+) only the strongest component is shown here. From the JPL database of molecular spectroscopy (Pickett et al. 1998).
(a)
Half-power beam width, from Roelfsema et al. (2012).
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