Simulating a white dwarf dominated halo

Halo initial mass functions (IMFs) heavily biased toward white dwarf (WD) precursors (similar to 1 - 8Mcircle dot) have been suggested as a suitable mechanism for explaining MACHO events.. However, by simple chemical evolution argument, Gibson Mould (1997; GM97) pointed out that such WD-heavy IMFs (wdIMF) cause the overproduction of carbon and nitrogen. We re-examine this problem using numerical simulations.