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Table 2
Atmospheric parameters of the irradiated M dwarf in AA Dor.
| Zone 1 | Zone 2 | Zone 3 | ||
| Parameter | θ < 20° | 20° < θ < 70° | 70° < θ | |
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| Teff (K) day side | 19 200 | 18 300 | 14 300 | |
| Dilution factor | 0.060 | 0.049 | 0.021 | |
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| Teff (K) night side | 2000 ± 500 | |||
| log g (cm s-2) | 5.25 ± 0.25 | |||
| FdM/FsdO (at 5000 Å, ϕ = 0.47) | 0.07 ± 0.02 | |||
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| Abundances | log (nX /nH) | + | − | × Solar |
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| He | –1.69 | 0.88 | 0.38 | 0.24 |
| C | –4.30 | 0.02 | 0.11 | 0.19 |
| N | –4.89 | 0.06 | 0.04 | 0.19 |
| O | –3.94 | 0.01 | 0.03 | 0.23 |
Notes. Surface abundances are also listed with respect to the solar abundances (Asplund et al. 2009).
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