Fig. 4.
Mass-luminosity diagram for GJ 758 B with COND (Baraffe et al. 2003) isochrones spanning 1–10 Gyr, going from lighter to darker shaded lines for the youngest isochrone to the oldest. The dynamical mass is best fitted to an old age, ≥8 Gyr, consistent with the current age estimations of the host star, yet displaying a discrepancy in isochronal age.
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