Fig. 20.
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KDE of observed [Fe/H] and q for RGB stars with ΔP < 130 s. The thick orange dashed line shows the fit to the observed data, with the parameters of the fit shown at the top of the panel and Table 5. The orange shaded region shows the 3-σ confidence interval on m and b, whilst the thin orange dashed lines show the maximum-likelihood intrinsic relation in steps of 1-σ.
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