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Fig. 3
ΔT as a functionof log(g) for the whole sample of RGB stars. Open circles with error bars denote the mean values of ΔT in 0.2 dex log(g) bins, and the1σ dispersion around these mean values. The solid line displays a linear fit to the binned data, with a slope that is consistent with zero (the slope is equal to 2 ± 8 K/dex).
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