Fig. 2
Cumulative [Fe/H] distribution for giant stars. Left: GWPs, divided into planet hosts included in the Reffert’s list (27 stars) and planet hosts not included in this list (16 stars). Right: GWOPs, divided into stars included in the UCO/Lick survey (10 stars) and GWOPs not included in this survey (57 stars). See text for details.
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