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Fig. 1

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Mass-radius relation for 25 of the known highly irradiated brown dwarfs transiting either a main sequence star (Carmichael et al. 2020 and references therein) or a white dwarf (Casewell et al. 2020a; Littlefair et al. 2014; Parsons et al. 2017), with the brown dwarfs under consideration here clearly labelled. Additionally, the effective temperatures of the brown dwarf hosting stars are indicated by the colour of each brown dwarfs circle, while the size of each coloured circle is proportional to the total incident surface irradiation. Also shown are the Sonora-Bobcat evolutionary models of Marley et al. (2018) for 100 Myr and 600 Myr at only solar metalicity, and at 2 Gyr, 6 Gyr, and 10 Gyr for both solar metallicities (grey) and low metallicities ([Fe/H] =−0.5 – black).

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