Fig. 5


Observational HR diagram for all stars in Gaia DR1 selected as explained in the text for which the (GKs) colour index can be calculated from Gaia DR1 and the data in the 2MASS Point Source Catalogue. The visualisation is the same as in Fig. 3 with the contours enclosing 10%, 30%, 50%, 70%, and 90% of the data.

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