Table 1
List of emission lines detected at the peak of the dust continuum emission at 219 GHz towards IRAS2A.
| Frequencya | S/N b | Identificationc | Quantum numbers |
| (MHz) | |||
|
|
|||
| 216 879 | low | ? | |
| 216 947 | high | CH3OH | 5 1 4 0–4 2 2 0 |
| + ? | |||
| 216 966 | high | CH3OCHO | 20 0 20 2–19 1 19 1 |
| 20 0 20 0–19 1 19 0 | |||
| 20 1 20 1–19 1 19 1 | |||
| 20 1 20 0–19 1 19 0 | |||
| 20 0 20 2–19 0 19 2 | |||
| 20 0 20 0–19 0 19 0 | |||
| 20 1 20 1–19 0 19 2 | |||
| 20 1 20 0–19 0 19 0 | |||
| 217 045 | high | ? | |
| 217 108 | high | SiO | 5 0–4 0 |
| 217 118 | high | SiO | 5 0–4 0 |
| 217 123 | high | SiO | 5 0–4 0 |
| 217 133 | high | SiO | 5 0–4 0 |
| + aGg′-(CH2OH)2 | 21 4 17 0–20 4 16 1 | ||
| 217 192 | high | CH3OCH3 | 22 4 19 3–22 3 20 3 |
| 22 4 19 5–22 3 20 5 | |||
| 22 4 19 1–22 3 20 1 | |||
| 22 4 19 0–22 3 20 0 | |||
| 217 238 | high | DCN | 3–2 |
| 217 263 | low | ? | |
| 217 300 | high | CH3OH, νt = 1 | 6 1 5 − 1–7 2 6 − 1 |
| 217 359 | medium | CH2DOH | 17 4 14 2–16 5 12 1 |
| 217 400 | high | ? | |
| 217 450 | high | CH2DOH | 18 1 17 2–18 2 17 0 |
| + aGg′-(CH2OH)2 | 24 1 24 0–23 1 23 1 | ||
| 24 0 24 0–23 0 23 1 | |||
| 217 492 | high | ? | |
| 217 588 | low | aGg′-(CH2OH)2 | 21 2 19 1–20 2 18 0 |
| 217 643 | high | CH3OH, νt = 1 | 15 6 10 − 1–16 5 11 − 1 |
| 15 6 9 1–16 5 12 1 | |||
| 217 804 | low | ? | |
| 217 887 | high | CH3OH | 20 1 19 0–20 0 20 0 |
| 218 022 | low | ? | |
| 218 067 | high | ? | |
| 218 127 | high | ? | |
| 218 156 | high | ? | |
| 218 181 | high | ? | |
| 218 199 | medium | ? | |
| 218 222 | high | H2CO | 3 0 3–2 0 2 |
| 218 281 | high | CH3OCHO | 17 3 14 2–16 3 13 2 |
| 218 298 | high | CH3OCHO | 17 3 14 0–16 3 13 0 |
| 218 317 | high | CH2DOH | 5 2 4 1–5 1 5 1 |
| 218 325 | high | HC3N | 24–23 |
| 218 389 | high | ? | |
| 218 441 | high | CH3OH | 4 2 2 0–3 1 2 0 |
| 218 459 | high | NH2CHO | 10 1 9–9 1 8 |
| 218 469 | low | ? | |
| + aGg′-(CH2OH)2 | 22 14 8 0–21 14 7 1 | ||
| 22 14 9 0–21 14 8 1 | |||
| 218 476 | high | H2CO | 3 2 2–2 2 1 |
| 218 482 | high | ? | |
| 218 498 | low | ? | |
| 218 554 | low | ? | |
| 218 575 | high | aGg′-(CH2OH)2 | 22 13 9 0–21 13 8 1 |
| 22 13 10 0–21 13 9 1 | |||
| 218 708 | high | ? | |
| + aGg′-(CH2OH)2 | 22 12 10 0–21 12 9 1 | ||
| 22 12 11 0–21 12 10 1 | |||
| 218 760 | high | H2CO | 3 2 1–2 2 0 |
| 218 861 | low | HC3N, ν7 = 1 | 24 − 1–23 1 |
| 218 903 | high | OCS | 18–17 |
| 218 981 | high | HNCO | 10 1 10–9 1 9 |
| 219 089 | medium | aGg′-(CH2OH)2 | 22 10 13 0–21 10 12 1 |
| 22 10 12 0–21 10 11 1 | |||
| 219 174 | medium | HC3N, ν7 = 1 | 24 1–23 − 1 |
| 219 242 | medium | ? | |
| 219 263 | low | ? | |
| 219 276 | low | SO2 | 22 7 15–23 6 18 |
| 219 385 | medium | aGg′-(CH2OH)2 | 22 9 14 0–21 9 13 1 |
| 22 9 13 0–21 9 12 1 | |||
| 219 398 | low | ? | |
| 219 410 | low | ? | |
| 219 441 | low | ? | |
| 219 474 | low | ? | |
| 219 540 | medium | HNCO, ν5 = 1 | 10 1 10 2 10–9 1 9 2 9 |
| + aGg′-(CH2OH)2 | 22 2 21 1–21 2 20 0 | ||
| 219 551 | high | HNCO | 10 4 7–9 4 6 |
| 10 4 6–9 4 5 | |||
| + CH2DOH | 5 1 5 1–4 1 4 1 | ||
| 219 560 | high | C18O | 2–1 |
| 219 580 | low | aGg′-(CH2OH)2 | 22 1 21 1–21 1 20 0 |
| 219 656 | high | HNCO | 10 3 8–9 3 7 |
| 10 3 7–9 3 6 | |||
| 219 719 | low | ? | |
| 219 735 | high | HNCO | 10 2 9–9 2 8 |
| 10 2 8–9 2 7 | |||
| 219 765 | medium | aGg′-(CH2OH)2 | 20 4 16 1–19 4 15 0 |
| 219 798 | high | HNCO | 10 0 10–9 0 9 |
| 219 803 | high | ? | |
| + aGg′-(CH2OH)2 | 22 8 15 0–21 8 14 1 | ||
| 219 825 | low | ? | |
| + CH3OCHO, νt = 1 | 18 10 8 3–17 10 7 3 | ||
| 18 10 9 3–17 10 8 3 | |||
| 219 892 | low | ? | |
| 219 908 | high | H213CO | 3 1 2–2 1 1 |
| 219 950 | high | SO | 5 6–4 5 |
| 219 965 | medium | SO | 5 6–4 5 |
| 219 984 | high | CH3OH | 25 3 22 0–24 4 20 0 |
| 219 994 | high | CH3OH | 23 5 19 0–22 6 17 0 |
| 220 030 | low | ? | |
| + CH3OCHO, νt = 1 | 18 9 9 3–17 9 8 3 | ||
| 18 9 10 3–17 9 9 3 | |||
| 220 038 | high | t-HCOOH | 10 0 10–9 0 9 |
| 220 072 | high | CH2DOH | 5 1 5 0–4 1 4 0 |
| 220 079 | high | CH3OH | 8 0 8 0–7 1 6 0 |
| 220 126 | medium | ? | |
| 220 153 | low | HNCO,ν5 = 1 | 10 0 10 2 10–9 0 9 2 9 |
| 220 167 | high | CH3OCHO | 17 4 13 2–16 4 12 2 |
| + HNCO, ν5 = 1 | 10 3 7 2 10–9 3 6 2 9 | ||
| 10 3 8 2 10–9 3 7 2 9 | |||
| 220 178 | high | CH2CO | 11 1 11–10 1 10 |
| 220 191 | high | CH3OCHO | 17 4 13 0–16 4 12 0 |
| 220 195 | medium | ? | |
| + HNCO, ν5 = 1 | 10 2 9 2 10–9 2 8 2 9 | ||
| 220 296 | low | ? | |
| 220 332 | high | ? | |
| 220 343 | low | ? | |
| 220 363 | medium | ? | |
| 220 369 | low | ? | |
| 220 402 | high | 13CO | 2–1 |
| + CH3OH | 10 − 5 5 0–11 − 4 8 0 | ||
| + aGg′-(CH2OH)2 | 22 7 16 0–21 7 15 1 | ||
Notes.
Peak signal-to-noise ratio of the (tentatively) detected line. High means >9, medium between 9 and 6, and low between 6 and 3.
A question mark means an unidentified line. A molecule name accompanied by a question mark refers to a partially unidentified line: an identified molecule emits at the frequency of the detected line; however its predicted line intensity is weaker than the observed one and thus there must be contribution from another (unidentified) species. All lines separated by ≲4 MHz are blended in our WideX data.
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