Lithium study with GESiDR6's PMS stars cluster

In this work we select 1246 high probability K/M-type constituent members of five young open clusters (5-125 Myr) in the Gaia-ESO Survey to test a series of models that use standard input physics and others that incorporate surface magnetic fields or cool starspots.

We find that: standard models provide systematically under- luminous isochrones for low-mass stars in the CMD and fail to predict Li- depletion of the right strength at the right colour; magnetic models provide better CMD fits with isochrones that are ~1.5-2 times older, and provide better matches to Li depletion patterns. We investigate how rotation periods, most of which are determined here for the first time from Transiting Exoplanet Survey Satellite data, correlate with CMD position and Li.