Table 4
Rotational transitions used in this work.
| Molecule | Transition | ν0 a | Eup∕kb | Au,lc | References |
|---|---|---|---|---|---|
| (MHz) | (K) | (s−1) | |||
| ortho c-C3H2 | 21,2–10,1 | 85 338.894 | 4.1 | 2.32 × 10−5 | 1 |
| HC15N | 1–0 | 86 054.966 | 4.1 | 2.20 × 10−5 | 10 |
| H13CO+ | 1–0 | 86 754.288 | 4.2 | 3.85 × 10−5 | 2 |
| SiO | 2–1 | 86 846.985 | 6.3 | 2.93 × 10−5 | 7 |
| HN13C | 1–0 | 87 090.825 | 4.2 | 2.38 × 10−5 | 9 |
| HNC | 1–0 | 90 663.568 | 4.4 | 2.69 × 10−5 | 8 |
| 13CS | 2–1 | 92 494.308 | 6.7 | 1.41 × 10−5 | 5 |
| C34S | 2–1 | 96 412.950 | 6.9 | 1.60 × 10−5 | 4, 5 |
| CH3OH A* | 20–10 | 96 741.371 | 7.0 | 3.41 × 10−6 | 11 |
| CS | 2–1 | 97 980.953 | 7.1 | 1.68 × 10−5 | 4, 5 |
| SO | 23–12 | 99 299.870 | 9.2 | 1.13 × 10−5 | 6 |
| 13CO | 1–0 | 110 201.354 | 5.3 | 6.33 × 10−8 | 2, 3 |
Notes. The spectroscopic information for the molecule marked with a star is taken from JPL, otherwise from CDMS. (a) Rest frequency. (b) Upper level energy. (c)Einstein coefficient for spontaneous emission from upper level u to lower level l.
References.(1) Spezzano et al. (2012); (2) Schmid-Burgk et al. (2004): (3) Cazzoli et al. (2004); (4) Gottlieb et al. (2003); (5) Bogey et al. (1982); (6) Tiemann (1974); (7) Müller et al. (2013); (8) Saykally et al. (1976); (9) van der Tak et al. (2009); (10) Cazzoli et al. (2005); (11) Müller et al. (2004).
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