An Increase in Small-planet Occurrence with Metallicity for Late-type Dwarf Stars in the Kepler Field and Its Implications for Planet Formation
Cicero X. Lu et al 2020 AJ 160 253
Analysis of the Kepler Data Release 25 planet candidate list demonstrates that planet occurrence increases with metallicity for all planet radii Rp down to at least Rp ≈ 2 R⊕.