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Fig. 2.


Histograms of relative parallax uncertainties for both giants (top panel with Teff <  5500 K and log g <  3.8 dex) and dwarfs (lower panel, including main-sequence and turn-off stars). The majority of the GALAH+TGAS overlap consists of dwarfs. Their mean parallax precision is in the order of 10%, while giants parallaxes are less precise with most uncertainties above 20%. The histograms are truncated at σ(ϖ) = ϖ for readability. All stars with parallax uncertainties larger than the parallax itself are hence contained in the last bin.

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