Fig. 15
[Rb/Fe] vs. [Fe/H] for our sample stars (LTE values shown as filled black circles) compared to the sample by Tomkin & Lambert (1999) (red squares for giants, and blue squares for dwarfs). The horizontal dotted line is the reference zero value with A(Rb) = 2.60 as the solar abundance, the dashed line would be the zero solar value if the meteoritic Rb abundance, A(Rb) = 2.38, were adopted.
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