Table 4
Averaged spectral characteristics of 18 cm OH lines and the production rate in 12P.
| UT date [yyyy/mm/dd] |  [km s−1] |
i(DE)b | i(SC)c | Tbgd [K] | vp+vee [km s−1] | QOH(DE)f [× 1029. molec..s−1] | QOH(SC)g [× 1029 molec. s−1] |
|---|---|---|---|---|---|---|---|
| 2024/01/20 | −22.81 | 0.49 | 0.44 | 3.9 | 1.42 ± 0.14 | 0.61 ± 0.08 | 0.68 ± 0.09 |
| 2024/03/02 | −22.02 | 0.51 | 0.47 | 3.2 | 2.33 ± 0.23 | 2.11 ± 0.13 | 2.30 ± 0.14 |
| 2024/03/03 | −21.91 | 0.51 | 0.47 | 3.2 | 1.86 ± 0.19 | 1.33 ± 0.11 | 1.45 ± 0.12 |
Notes. a Mean radial velocity with respect to Sun. b Maser inversion from Despois et al. (1981). c Maser inversion from Schleicher & A'Hearn (1988). d The background temperature at 1667 MHz was measured by interpolating the continuum maps at 408 MHz (Remazeilles et al. 2015; Haslam et al. 1974) following the method mentioned in Despois et al. (1981). e Half lower bases of the fitted trapezia. f Production rate of OH calculated using the inversion from Despois et al. (1981). g Production rate of OH calculated using the inversion from Schleicher & A'Hearn (1988).
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