Binks, A. S.A. S.BinksJeffries, R. D.R. D.JeffriesJackson, R. J.R. J.JacksonFRANCIOSINI, ElenaElenaFRANCIOSINISACCO, GIUSEPPE GERMANOGIUSEPPE GERMANOSACCOBayo, A.A.BayoMAGRINI, LAURALAURAMAGRINIRANDICH, Maria SofiaMaria SofiaRANDICHArancibia-Silva, J.J.Arancibia-SilvaBergemann, M.M.BergemannBRAGAGLIA, AngelaAngelaBRAGAGLIAGilmore, G.G.GilmoreGonneau, A.A.GonneauHourihane, A.A.HourihaneJofré, P.P.JofréKorn, A. J.A. J.KornMORBIDELLI, LORENZOLORENZOMORBIDELLIPRISINZANO, LoredanaLoredanaPRISINZANOWorley, C. C.C. C.WorleyZAGGIA, SimoneSimoneZAGGIA2022-03-172022-03-1720210035-8711http://hdl.handle.net/20.500.12386/31676Astrometry and photometry from Gaia and spectroscopic data from the Gaia-ESO Survey (GES) are used to identify the lithium depletion boundary (LDB) in the young cluster NGC 2232. A specialized spectral line analysis procedure was used to recover the signature of undepleted lithium in very low luminosity cluster members. An age of 38 ± 3 Myr is inferred by comparing the LDB location in absolute colour-magnitude diagrams (CMDs) with the predictions of standard models. This is more than twice the age derived from fitting isochrones to low-mass stars in the CMD with the same models. Much closer agreement between LDB and CMD ages is obtained from models that incorporate magnetically suppressed convection or flux-blocking by dark, magnetic starspots. The best agreement is found at ages of 45-50 Myr for models with high levels of magnetic activity and starspot coverage fractions >50 per cent, although a uniformly high spot coverage does not match the CMD well across the full luminosity range considered.STAMPAenArticle10.1093/mnras/stab13512-s2.0-85108158120http://arxiv.org/abs/2105.01153v1https://academic.oup.com/mnras/article/505/1/1280/62746992021MNRAS.505.1280BFIS/05 - ASTRONOMIA E ASTROFISICA