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Table 2

Stellar parameters for the XO-2 components derived from the analysis of the HARPS-N spectra and from stellar evolutionary tracks.

Parameter XO-2N XO-2S Note

Teff [K] 5332 ± 57 5395 ± 54
log g [cgs] 4.44 ± 0.08 4.43 ± 0.08
[Fe/H] [dex] 0.43 ± 0.05 0.39 ± 0.05
Microturb. ξ [km s-1] 0.88 ± 0.11 0.90 ± 0.10
VsinI [km s-1] 1.07 ± 0.09 1.5 ± 0.3
Mass [M] 0.97 ± 0.05 0.98 ± 0.05 (1)
0.96 ± 0.05 (2)
Radius [R] 1.01 1.02 (1)
0.998 (2)
Age [Gyr] 7.9 7.1 (1)
7.8 (2)
Luminosity [L] 0.70 ± 0.04 0.79 ± 0.14 for XO-2N: (2)
for XO-2S: (1)

Notes. The adopted values represent the weighted mean of individual measurements obtained with different methods (except for the projected velocity VsinI, for which we adopt the measurement derived from the Rossiter-McLaughlin effect), and their associated uncertainties are, for a more conservative estimate, the average of the uncertainties of the individual values. (1) Matching the Teff, [Fe/H], and log g to the Yonsei-Yale evolutionary tracks. (2) Matching the Teff, [Fe/H], and stellar density to the Yonsei-Yale evolutionary tracks.

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