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Table 2

Observed values used for the mesa calibration.

X σ X Reference

log L/L 0.0 4 × 10-4 Fröhlich & Lean (2004)
T eff 5777 K 5 K Scott et al. (2015)
Z/X 0.0231 or 0.0181 0.002 GS98, A09
He 0.2485 0.0034 Basu & Antia (2004)
R cz / R 0.713 10-3 Basu & Antia (1997)
δ c s 0.0 10-4 Rhodes et al. (1997)

Notes. The value of Z/X depends on the use of the GS98 (0.0231) or A09 (0.0181) abundances.

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