Relative Fe abundances of giants (red circles) and dwarfs with planetary companions versus T
. The sources of the giant abundances and T
other than those for HD 13189 are given in the text. Dwarf abundances are from Fischer & Valenti (2005; black circles), Santos, Israelian, & Mayor (2004; black squares), and Santos et al. (2005; black triangles). The horizontal line represents the mean Fe abundance ([Fe=H] = +0:13) of the dwarf sample.