HR diagram of Gaia DR2. Left panel: 4 705 366 stars, after filtering, and in low-extinction Galactic regions. Middle panel: 4 640 635 stars, after removing stars with an RP/BP flux excess following Evans et al. (2018). Right panel: 3 716 407 stars with the 2MASS photometric quality flag Q fl = AAA, and after removing stars showing color excess using G − J (see text).
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