Rest frequency of spectral lines
| Atom/Molecule | Line Name | Rest frequency (GHZ) |
|---|---|---|
| HI | neutral hydrogen | 1.420405752 |
| OH | hydroxyl radical | 1.6122310 |
| OH | hydroxyl radical | 1.6654018 |
| OH | hydroxyl radical | 1.6673590 |
| OH | hydroxyl radical | 1.7205300 |
| H2CO | ortho-formaldehyde | 4.829660 |
| CH3OH | methanol | 6.668518 |
| HC3N | cyanoacetylene | 9.098332 |
| CH30H | methanol | 12.178593 |
| H2CO | ortho-formaldehyde | 14.488490 |
| C3H2 | ortho-cyclopropenylidene | 18.343145 |
| H20 | ortho-water | 22.23507985 |
| NH3 | para-ammonia | 23.694506 |
| NH3 | para-ammonia | 23.722634 |
| NH3 | ortho-ammonnia | 23.870130 |
| SiO | silicon monoxide | 42.820570 |
| SiO | silicon monoxide | 43.122090 |
| SiO | silicon monoxide | 43.423853 |
| CS | carbon monosulfide | 48.990964 |
| DCO+ | deuterated formylium | 72.039331 |
| SiO | silicon monoxide | 85.640456 |
| SiO | silicon monoxide | 86.243442 |
| H13CO+ | formylium | 86.754294 |
| SiO | silicon monoxide | 86.846998 |
| HCN | hydrogen cyanide | 88.631847 |
| HCO+ | formylium | 89.188518 |
| HNC | hydrogen isocyanide | 90.663574 |
| N2H+ | diazenylium | 93.173809 |
| CS | carbon monosulfide | 97.980968 |
| C18O | carbon monoxide | 109.782182 |
| 13CO | carbon monoxide | 110.20137 |
| CO | carbon monoxide | 115.271203 |
Also see Lovas, Snyder and Johnson``Recommended rest frequencies for observed interstellar molecular transitions'' (1979), or use Lovas's search engine.
Original: Bob Sault (01-May-2004)
Modified: Robin Wark (3-Apr-2012)