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Fig. 12

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Scatter diagrams of log RHK,PHOENIX with (a) Teff, (b) log g, and (c) [Fe/H] for the solar-like stars investigated in this work. The position of the solar log RHK,PHOENIX in these diagrams is denoted by a (*) symbol. The black dashed lines represent the fit median values of log RHK,PHOENIX The color scale indicates the number density. Some values of log RHK,PHOENIX outside the displayed range are considered insignificant for the overall distribution and are therefore not shown.

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