Did Massive Primordial Stars Preenrich the Lyα Forest

摘要: We examine the dynamical evolution and statistical properties of supernova ejecta massive primordial stars in a cosmological framework to determine whether this first population could have enriched universe levels dispersions seen by most recent observations Lyα forest. evolve Λ cold dark matter model 1 Mpc3 volume redshift z = 15 add "bubbles" metal corresponding generation all halos with masses greater than 5 × 105 M☉. These initial conditions are then evolved 3, distribution metals compared observations. In absence further star formation, is initially contained filaments. Photoevaporation metal-enriched gas due metagalactic ultraviolet background radiation at epoch reionization (z ~ 6) causes sharp increase filling factor. At ~2.5% simulation (≈20% total mass) filled above metallicity 10-4 Z☉, less 0.6% 10-3 Z☉. This suggests that even optimistic prescription for placement supernovae amount produced each supernova, cannot entirely be responsible enrichment forest current unless we severely underestimated duration Population III epoch. However, comparison using carbon as tracer shows can significant contributors very low overdensity