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Fig. 9

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HR diagrams of OCs with Li-rich members color coded to the Li abundance are plotted in the left panels with two sets of parameters: the spectroscopic parameters (left) and the photometric temperature and trigonometric log ɡ (right). The isochrones are taken from the PARSEC tracks. The star symbols correspond to the canonical Li-rich stars. The orange square symbols correspond to the Li-rich stars which are defined with the criteria in Sect. 4.3. The right panels show the Li lines in their spectra. In the right panels of NGC6705 and NGC2477, we demonstrate the stars with the highest S/N for visual clarity.

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