Fig. 2
The evolution in surface gravity over the 1–100 Myr age range for objects with masses of ~ 1–50 MJup. The values are taken from the DUSTY00 models (Chabrier et al. 2000) and show the systematic increase in log (g) over time as the objects contract. These tracks are used to determine the restricted range of surface gravity to allow in model fits to our young targets.
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