Table 2.
Observed line-flux ratios compared to predictions for optically thin emission and excitation following the Boltzmann distribution.
| υ (GHz) | v, NJ | Obs. ratio | LTE ratio | τ | ||
|---|---|---|---|---|---|---|
| W Hya | ||||||
| 130.1 | 0, 1325/2 | 0.875 ± 0.2 | 0.93 | 0.03 | (0.06) | |
| 130.6 | 1, 1021/2 | 0.75 ± 0.26 | 1.10 | 0.02 | (0.05) | |
| 265.7 | 0, 1835/2 | 0.71 ± 0.22 | 0.95 | |||
| 333.4 | 1, 1735/2 | 1.2 ± 0.5 | 1.06 | 0.002 | (0.01) | |
| R Dor | ||||||
| 107.0 | 0, 1223/2 | 0.59 ± 0.22 | 0.92 | 0.01 | ||
| 252.1 | 0, 1429/2 | 1.12 ± 0.07 | 1.07 | 0.02 | ||
| 317.4 | 0, 1633/2 | 1.04 ± 0.18 | 1.06 | 0.02 | ||
| 351.6 | 0, 1735/2 | 1.29 ± 0.31 | 1.06 |
Notes. The ratios are given by the flux of the higher-frequency line divided by that of the lower-frequency line (see Table 1). We also give the estimated optical depth (τ) for each line when the emission region could be estimated. The optical depth estimate for the flux from the small region in W Hya (see text) is given in parentheses.
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