Fig. 7.
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HRD of the Galactic sample with luminosities below the RGB-tip luminosity of 2500 L⊙. Different markers denote whether the orbital periods of the objects are known. The colour scale indicates the elapsed time from the end of mass transfer in our post-RGB models, defined as the age of the post-RGB star, for the solar and metal-poor grids in panels (a) and (b), respectively.
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