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Table 3
Stellar atmospheric parameters and their differences for XO-2N and XO-2S.
Parameter | XO-2N | XO-2S | ΔN − S |
|
|||
Analysis based on equivalent widths | |||
Teff [K] | 5320 ± 50 | 5330 ± 50 | −10 ± 71 |
log g [cgs] | 4.46 ± 0.08 | 4.41 ± 0.12 | + 0.05 ± 0.14 |
ξ [km s-1] | 0.89 ± 0.14 | 0.93 ± 0.04 | −0.04 ± 0.15 |
[Fe/H]a [dex] | 0.37 ± 0.07 | 0.32 ± 0.08 | + 0.05 ± 0.11 |
Line-by-line analysis | |||
Teff [K] | 5290 ± 18 | 5322 ± 25 | −32 ± 31 |
log g [cgs] | 4.43 ± 0.10 | 4.41 ± 0.10 | + 0.02 ± 0.14 |
ξ [km s-1] | 0.86±0.06 | 0.93 ± 0.05 | −0.07 ± 0.08 |
[Fe/H]a [dex] | 0.37 ± 0.07 | 0.32 ± 0.08 | + 0.05 ± 0.11 |
Differential analysis | |||
Teff (K] | 5290 ± 18 | 5325 ± 37 | −35 ± 8 |
log g [cgs] | 4.43 ± 0.10 | 4.420 ± 0.094 | + 0.010 ± 0.020 |
ξ [km s-1] | 0.86 ± 0.06 | 0.93 ± 0.03 | −0.07 ± 0.07 |
[Fe/H]a [dex] | 0.37 ± 0.07 | 0.32 ± 0.08 | + 0.054 ± 0.013 |
Notes. See discussion in Sect. 3.2.
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