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Fig. 17.

image

Top: Gaia DR2 absolute magnitudes MG of all Ap stars with Teff <  8000 K as a function of the logarithm of their luminosities Lum. The black line represents a linear fit. Bottom: residual differences beween the MG and their fitted values MG(fit). Objects with absolute differences larger than 0.04 mag (dashed lines) are marked by their names.

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