Table 4
Frequencies of OH Λ-doubling transitions from astronomical observations and comparison with calculated frequencies.
| υ, N, J(a) | Fup – Flow (a) | Frequency (MHz) (b) | Unc. (MHz) (b) | O–C(c) (MHz) | Observed source(d) | Line(e) |
|---|---|---|---|---|---|---|
| 0, 12, 23/2 | 12+−12− | 107037.11 | 0.72 | 0.2923 | R Dor | |
| 0, 12, 23/2 | 11+–11− | 107073.45 | 0.81 | 0.3731 | R Dor | |
| 0, 13, 25/2 | 13−−13+ | 130078.59 | 0.68 | 0.3580 | W Hya | |
| 0, 13, 25/2 | 12−− 12+ | 130113.79 | 0.67 | 0.3499 | W Hya | |
| 0, 13, 27/2 | 13−−13+ | 221333.34 | 1.50 | −0.6893 | R Hya, R Aql, S Pav | 1 |
| 0, 13, 27/2 | 14−−14+ | 221351.17 | 1.50 | −0.8575 | R Hya, R Aql, S Pav | 2 |
| 0, 17, 33/2 | 17−−17+ | 236327.29 | 1.50 | 0.5849 | R Hya, R Aql, S Pav | 5 |
| 0, 17, 33/2 | 16−−16+ | 236356.12 | 2.00 | −2.0998 | R Hya | 6 |
| 0, 14, 29/2 | 14+−14− | 252123.22 | 1.50 | −1.6962 | R Hya, R Aql, S Pav | 7 |
| 0, 14, 29/2 | 15+−15− | 252141.78 | 1.50 | −1.3937 | R Hya, R Aql, S Pav | 8 |
| 0, 14, 29/2 | 14+−14− | 252124.11 | 1.63 | −0.8102 | IK Tau | |
| 0, 14, 29/2 | 15+−15− | 252143.25 | 1.66 | 0.0764 | IK Tau | |
| 0, 14, 29/2 | 14+−14− | 252124.49 | 1.65 | −0.4272 | R Dor | |
| 0, 14, 29/2 | 15+−15− | 252143.01 | 1.65 | −0.1597 | R Dor | |
| 0, 18, 35/2 | 18+−18− | 265731.67 | 2.00 | −0.9819 | R Hya | 9 |
| 0, 18, 35/2 | 18+−18− | 265733.29 | 1.38 | 0.6351 | W Hya | |
| 0, 18, 35/2 | 17+−17− | 265763.71 | 1.37 | 0.3956 | W Hya | |
| 0, 16, 33/2 | 16+−16− | 317390.81 | 1.85 | −1.5320 | R Dor | |
| 0, 16, 33/2 | 17+−17− | 317408.68 | 1.60 | −2.2051 | R Dor | |
| 0, 17, 35/2 | 17−−17+ | 351583.57 | 1.78 | −3.4769 | R Dor | |
| 0, 17, 35/2 | 18−−18+ | 351602.50 | 1.77 | −3.1278 | R Dor | |
| 1, 10, 21/2 | 10+−10− | 130639.84 | 0.82 | 0.9539 | W Hya | |
| 1, 10, 21/2 | 11+−11− | 130653.94 | 0.74 | −0.4141 | W Hya | |
| 1, 17, 35/2 | 17−−17= | 333386.59 | 1.71 | −1.7442 | W Hya | |
| 1, 17, 35/2 | 18−−18+ | 333405.24 | 1.87 | −0.4388 | W Hya |
Notes. (a)Quantum numbers defined in Sect. 3.3. (b)Observed frequency and uncertainty, rounded to 2 dp, from this work (line number in last column) and from Khouri et al. (2019). (c)O–C derived from observed frequency (third column in this table) minus calculated frequency (see frequency column in υ = 0, 1 OH frequency tables in Appendix A) and rounded to 4 dp. (d)Observed sources are: R Hya, R Aql and S Pav (this work) and, IK Tau, R Dor, W Hya (Khouri et al. 2019). (e)Line number as in Table 3.
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