Stellar metallicity, [Fe/H], as a function of the stellar radius. Colours and symbols are the same as in previous figures for LMSWP, SGWP, and SGWOP samples. Giants with M⋆ ≤ 1.5 M⊙ are plotted in blue triangles, while giants with M⋆ > 1.5 M⊙ are shown with purple circles. In both cases, filled symbols indicate planet hosts. Typical uncertainties in metallicities and stellar radius are also shown.
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