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Fig. 2

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The pseudo-EW (pEW) of Sr II 4077 vs. Ca II H in the upper panel and Ba II 4554 vs Ca II H in the lower panel. The Sr-rich stars are plotted in red and labeled. The remaining stars in our spectral data set are plotted in black circles. In the lower panel, only A166 is labeled so as not to obstruct the rest of the data. Note that we plot the pseudo-EWs of these lines rather than the traditional EWs as there is no true continuum to measure in many of these stars due to strong molecular bands.

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