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Fig. A.1

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Analytic approximation of the function ηeff(FXUV/ρp, p) as given by Eqs. (A.2)(A.7). The data points are color-coded to reflect the intensity of the XUV irradiation, according to the same color scheme as in Fig. 2 where FXUV varies between 102 (deepest blue) and 106 (deepest red) erg s−1 cm−2. The thick red line represents the convergence limit of the ATES code described in Sect. 6.1 of Caldiroli et al. (2021).

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