Table 3
Spectral-line results for ammonia, hydrogen sulphide, hydroxyl, and silicon monoxide.
| Species and | Rotational | Eupp/k† | Rest freq. | Setting & | rms‡ | Peak | Area | Veloc. range | |
| elec./vibr. state | quantum nums. | (K) | (GHz) | sideband | (mK) | (mK) | (K km s-1) | LSR (km s-1) | Comments |
|
|
|||||||||
| ortho-NH3v = 0 | JK =
 – |
27 | 572.498 | 14 USB | 6.6 (1.05) | 308 | 15.5 | [–50; +65] | |
JK =
 – |
170 | 1763.525 | 19 LSB | 77.8 (1.02) | 1441 | 68.9 | g-fitted | ||
| para-NH3v = 0 | JK =
 – |
127 | 1763.821 | 19 LSB | 77.8 (1.02) | 450 | 21.0 | g-fitted | |
JK =
 – |
143 | 1763.602 | 19 LSB | 77.8 (1.02) | ≲100 | ≲4.5 | |||
| ortho-H2S v = 0 | JKa,Kc = 31,2–22,1 | 117 | 1196.012 | 05 LSB | 88.8 (1.01) | 177 | 10.3 | g-fitted | |
| para-H2S v = 0 | JKa,Kc = 31,3–20,2 | 103 | 1002.779 | 09 USB | 33.1 (1.05) | 97 | 4.22 | g-fitted | tent. detec. |
| JKa,Kc = 52,4–51,3 | 303 | 1862.436 | 01 LSB | 90.9 (0.97) | 590 | 11.8 | g-fitted | ||
OH  v = 0 |
J = 3/2–1/2 | 270 | 1834.747 | 16 LSB | 55.5 (0.98) | 1768 | 85.5 | [–40; +90] | |
| 28SiO v = 0 | J = 14–13 | 219 | 607.608 | 13 LSB | 5.4 (0.99) | 370 | 15.5 | [–40; +105] | |
| J = 16–15 | 283 | 694.294 | 17 USB | 13.4 (1.08) | 384 | 15.1 | [–35; +85] | ||
| v = 1 | J = 13–12 | 1957 | 560.325 | 14 LSB | 6.6 (1.08) | 76 | 2.13 | [–15; +67] | |
| J = 15–14 | 2017 | 646.429 | 12 LSB | 7.8 (0.93) | 108 | 3.01 | [–20; +60] | ||
| J = 23–22 | 2340 | 990.355 | 09 LSB | 33.1 (1.06) | 178 | 5.12 | g-fitted | ||
| J = 27–26 | 2550 | 1161.945 | 06 USB | 59.5 (1.03) | 190 | 5.36 | g-fitted | ||
| J = 40–39 | 3462 | 1717.236 | 04 USB | 64.5 (1.05) | 160 | 4.98 | g-fitted | tent. detec. | |
| v = 2 | J = 26–25 | 4282 | 1111.235 | 07 USB | 22.0 (1.08) | 140 | 3.43 | g-fitted | |
| J = 27–26 | 4297 | 1153.804 | 06 LSB | 59.5 (1.04) | 925 | 25.3 | g-fitted | maser ? | |
| J = 28–27 | 4355 | 1196.353 | 05 LSB | 88.8 (1.01) | 50 | 2.50 | g-fitted | tent. detec. | |
| 29SiO v = 0 | J = 13–12 | 187 | 557.179 | 14 LSB | 6.6 (1.08) | 138 | 5.73 | [–15; +75] | |
| J = 26–25 | 722 | 1112.798 | 07 USB | 22.0 (1.08) | 203 | 7.07 | g-fitted | ||
| v = 1 | J = 16–15 | 2036 | 680.865 | 17 LSB | 13.4 (1.10) | 35 | 0.97 | g-fitted | |
| 30SiO v = 0 | J = 26–25 | 713 | 1099.708 | 07 LSB | 22.0 (1.09) | 231 | 6.47 | [–20; +70] | |
| J = 42–41 | 1832 | 1771.251 | 19 USB | 77.8 (1.02) | 153 | 3.68 | g-fitted | tent. detec. | |
Notes.
Since ortho- and para-NH3 behave as different chemical species, for
para-NH3 the level excitation energies are relative to that of the
lowest para level (JK =
), while
for ortho-NH3 are given w.r.t. the
JK =
level.
Since the ortho and para spin isomer variants of hydrogen sulphide behave as
different chemical species, for ortho-H2S the level excitation energy is
relative to its lowest (ortho) energy level, the
JKa,Kc
= 10,1, while for the para species they are given w.r.t. the
JKa,Kc
= 00,0 ground level.
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