We set up numerical N-body simulations to statistically analyse the composition and timing of impactors onto young M-dwarf exoplanets. Composition regions of planetesimals and embryos are sub-divided into three regions, modelling different initial states and geophysical scenarios for protoplanets.
The evolution of the protoplanets and impacting planetesimals are motivated by two mechanisms: internal evolution from radioactive decay (being heated drives water and volatiles off); and dehydration of protoplanets during their "magma ocean" phases, which is caused by heating from the central star,