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Fig. 18

image

Flux ratios outside and inside a methane absorption feature in the H band (left) and in the Ks band (right) as a function of the effective temperature of HD 19467B (star symbol) and GJ 758B (red square). The evolution predicted by the model of Baraffe et al. (2015) for an age of 5 Gyr is also shown (solid curve).

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