Table C.1
Rest frequencies of pure rotational lines of HCN and H13CN.
| Transition | HCN | H13CN | ||||
|---|---|---|---|---|---|---|
| mm Notation | mid-IR Notation | Fu − Fl | No HFS | HFS | No HFS | HFS |
| (MHz) | (MHz) | (MHz) | (MHz) | |||
| v = 0 J = 1−0 | G.S.(σ+)Re(0) | 88631.602 | 86339.921 | |||
| 1 − 1 | 88630.415 | 86338.735 | ||||
| 2 − 1 | 88631.847 | 86340.166 | ||||
| 0 − 1 | 88633.936 | 86342.255 | ||||
| v = 0 J = 3−2 | G.S.(σ+)Re(2) | 265886.433 | 259011.798 | |||
| 3 − 3 | 265884.890 | 259010.255 | ||||
| 2 − 1 | 265886.188 | 259011.552 | ||||
| 3 − 2 | 265886.433 | 259011.796 | ||||
| 4 − 3 | 265886.499 | 259011.862 | ||||
| 2 − 3 | 265886.979 | 259012.345 | ||||
| 2 − 2 | 265888.522 | 259013.886 | ||||
 J = 3−2 |
ν2(π)Re(2) | 265852.708 | 258936.050 | |||
 J = 3−2 |
ν2(π)Rf(2) | 267199.282 | 260224.813 | |||
 J = 3−2 |
2ν2(σ+)Re(2) | 267243.200 | 260224.390 | |||
Notes. The frequencies are included in the MADEX code (Cernicharo et al. 2012) and were derived from the fit to all the laboratory frequencies available hitherto in the literature and other data still unpublished involving many vibrational states (Cernicharo et al., in prep.). The rest frequencies for the hyperfine components are given for the J = 1− 0 and 3− 2 lines of the vibrational ground state. The uncertainties are below 5 kHz for all the rest frequencies. We introduce a notation for the rotational transitions commonly used in works based on millimeter observations (Col. 1) and the transitions expressed with the notation that we are using in the current work for the mid-IR transitions (Col. 2).
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