Hertzsprung-Russell diagram of the PMS-like sources with known parallaxes. The symbols are as in Fig. 5. The PMS evolutionary tracks of Siess et al. (2000) are shown as solid lines with the labels representingtheir masses. The isochrones at ages of 1, 3, 10, 30, and 300 Myr are shown with dashed lines. The stars labeled as #17 and #27 lie above the 1-Myr isochrone and are likely lithium-rich giants.
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