Fig. 5
The extent of excess emission at 24 μm for the TWA stars and brown dwarfs. The dot-dashed line represents the limit of F24/FK under the assumption that both bands lie on the Rayleigh-Jeans tail of the stellar spectrum. The dashed line represents a geometrically thin, optically thick flat disk with a spectral slope λFλ ∝ λ−4/3.
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