Fig. 10

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Color-magnitude diagram of the RASS sources identified as stars. The color scales with the X-ray luminosities, and the blue and red solid lines show the PARSEC isochrones for stellar ages of 4 × 107 and 4 × 109 yr (Bressan et al. 2012), respectively. The cyan and green solid lines in the close-up indicate isochrones of 1.25 × 107 and 1.25 × 108 yr and the green dashed line shows the binary sequence at 1.25 × 108 yr. Sources located below the dashed line (black dots) are more than 1.5 mag fainter than the main sequence.
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