Fig. 4.
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A(Li) vs. Teff for stars without known planets (N, top) and those that host confirmed planets (Y, bottom). The grey shaded region corresponds to the transition region we called the isthmus. The colour bar shows the logarithm of the number of stars per A(Li)–Teff bin, normalised to unity for N stars and the same value multiplied by ten for the Y stars.
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