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Fig. 6
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Best-fit relationship between effective temperature and colour (Eq. (3), black solid line). The red points represent the sample of Casagrande et al. (2010), while the blue points are the sample of Mann et al. (2015). The green line represents Eq. (1) in Casagrande et al. (2021) where we imposed log g=4.438068 and [Fe∕H]=0.
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