Table 3: Physical parameters of BDs/VLMSs in Chamaeleon I derived from a comparison of synthetic GAIA-cond models and high-resolution by Natta et al. (2004) using different line profile setups: (from left to right) effective temperature, surface gravity, lithium abundance and EW of lithium. The given results are for (i) a fit to the full range of free model parameters: $T_{{\rm eff}}$ , $\log(g)$ , $\log(\epsilon)$ , radial velocity and rotational velocity (first row of each observation) and (ii) for a fit with fixed effective temperature as determined by Comerón et al. (2000) (second row).

Object $T_{{\rm eff}}$ $\log(g)$ $\log(\epsilon)$ EW $_{{\rm Li}}$ $T_{{\rm eff}}$ $\log(g)$ $\log(\epsilon)$ EW $_{{\rm Li}}$

(K) (Å) (K) (Å)

Setup1 Setup2

Cha H $\alpha$ 2 3100 4.0 1.2 0.37 3000 5.5 1.5 0.43

2900 3.5 1.2 0.37 2900 3.5 1.3 0.38

Cha H $\alpha$ 3 3100 4.0 1.3 0.38 3000 5.5 1.6 0.45

2800 3.5 1.3 0.38 2800 3.5 1.3 0.39

Cha H $\alpha$ 5 3100 4.0 1.5 0.40 3000 5.5 1.7 0.48

3000 3.5 1.5 0.40 3000 5.5 1.7 0.48

Cha H $\alpha$ 6 3100 4.0 1.6 0.41 3000 5.5 1.7 0.48

2800 3.5 1.5 0.41 2900 3.5 1.5 0.41

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