Fig. 13
a) Log(Ca ii cm-2) against Log(paralactic distance pc). b) Log(Spectroscopic parallax distance pc) against Log(paralactic distance pc) c) Log(Ca ii cm-2) against Log(Spectroscopic parallax distance pc). Parallaxes and spectral types are from simbad. Only stars of spectral type V are included in the plot. Ca ii column densities are taken from Gudennavar et al. (2012).
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