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Table 1
A list of spectral lines used for chemical analysis.
| Molecule | Transition | Freq. |
|
| (GHz) | (K km s-1) | ||
|
|
|||
| CO | 4−3 | 461.04 | 501.83 |
| 6−5 | 691.47 | 895.68 | |
| 7−6 | 806.65 | 877.8 | |
| HCN | 1−0 | 88.632 | 56.860 |
| 4−3 | 354.51 | 89.725 | |
| 5−4 | 443.116 | 88.629 | |
| HNC | 1−0 | 90.664 | 8.0164 |
| 3−2 | 271.981 | 10.561 | |
| 4−3 | 362.630 | 8.5620 | |
| HCO+ | 1−0 | 89.1885 | 23.681 |
| 4−3 | 356.7343 | 45.648 | |
| SiO | 2−1 | 86.847 | 2.0543 |
| 8−7 | 347.331 | 1.8295 | |
| 9−8 | 390.729 | 1.7224 | |
| CS | 2−1 | 97.981 | 12.130 |
| 6−5 | 293.912 | 22.196 | |
| 7−6 | 342.883 | 22.423 | |
| 8−7 | 391.847 | 22.484 | |
| p-H2CO | 20,2–10,1 | 145.603 | 2.1535 |
| 40,4−30,3 | 290.623 | 0.95264 | |
| N2H+ | 3−2 | 279.512 | 1.6709 |
| 4−3 | 372.673 | 1.7412 | |
| 5−4 | 465.825 | 1.2520 | |
| SO | 23−12 | 99.300 | 1.0909 |
| 78−67 | 304.077 | 3.7813 | |
| 89−78 | 346.527 | 3.7220 | |
| 910−89 | 389.120 | 3.9306 | |
| CN | 11 / 2−01 / 2 | 113.169 | 14.283 |
| 13 / 2−01 / 2 | 113.495 | 14.004 | |
| 37 / 2−25 / 2 | 340.249 | 29.820 | |
| HC3N | 10−9 | 90.979 | 0.54742 |
| 18−17 | 163.753 | 1.0548 | |
| NO | 4−3 | 350.69 | 2.4023 |
| p-H3O+ | 32 + −22 − | 364.797 | 2.5981 |
| 31 + −21 − | 388.459 | 2.1160 | |
| 13CO | 3−2 | 330.588 | 25.334 |
| H13CN | 1−0 | 86.3399 | 5.0428 |
| 2−1 | 172.6778 | 10.346 | |
| 4−3 | 345.3398 | 9.0259 | |
| H13CO+ | 1−0 | 86.7543 | 1.1076 |
| 2−1 | 173.5067 | 1.4072 | |
| 4−3 | 346.9983 | 1.3180 | |
|
|
|||
Notes. Their transitions, frequencies, and velocity-integrated intensities in the range of –120 to –90 km s-1 are shown.
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