Lithium-rich M-dwarfs at the ZAMS: Evidence for planetary engulfment?

R. D. Jeffries, R. J. Jackson, I. Baraffe

We identify 6 early M-dwarfs, in 3 open clusters (NGC 2451a, Blanco 1 and NGC 2516) at ages of 50-200 Myr, that are anomalously enriched in lithium compared with Li-depleted siblin…