Table 1
Parameters of the OH 18-cm lines observed with the Nançay radio telescope and production rates in 2021.
| UT date (mm/dd.dd–dd.dd) | 〈Δ〉 (au) | 〈rh〉 (au) | ṙh (km s−1) | inv(a) | inv(b) | Tbg (K) | Line area (mJy km s−1) | Doppler shift (km s−1) | Prod. rate(a) (molec s−1) |
|---|---|---|---|---|---|---|---|---|---|
| 09/26.17–10/25.11 | 0.47 | 1.25 | −5.0 | −0.23 | −0.28 | 3.4 | −51 ± 6 | −0.32 ± 0.12 | 1.1 ± 0.1 × 1028 |
| 12/20.12–12/32.09 | 0.47 | 1.38 | +10.0 | −0.16 | −0.18 | 3.1 | −43 ± 6 | +0.02 ± 0.15 | 2.0 ± 0.3 × 1028 |
Notes. (a)Maser inversion and OH production rate using the Despois et al. (1981) inversion model and a OH lifetime of 0.95 × 105 s at 1 au. (b)Maser inversion model from Schleicher & A’Hearn (1988); the corresponding QOH would be 0.9 and 1.8 × 1028 molec s−1, respectively.
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