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Fig. 2


Compilation of the values of λ, measured via the RM effect, as a function of the host star effective temperature (see: HAT-P-18b is shown as a filled blue dot. For the two objects marked with red squares, the determination of λ is doubtful (see text for details). The dashed red line at Teff = 6250 K marks the limit above which the mass of the convective shell becomes negligible (Winn et al. 2010a).

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