The First Supernova Explosions in the Universe
作者： Volker Bromm , Naoki Yoshida , Lars Hernquist
DOI: 10.1086/379359
关键词:
摘要: We investigate the supernova explosions that end lives of massive Population III stars in low-mass minihalos (M ~ 106 M☉) at redshifts z 20. Employing smoothed particle hydrodynamics method, we carry out numerical simulations a cosmological setup pair-instability supernovae with explosion energies ESN = 1051 and 1053 ergs. Whereas lower energy leaves part halo intact, find more energetic leads to complete disruption gas minihalo expels 90% stellar metals into region ~1 kpc across over timescale 3-5 Myr. Because this burstlike initial star formation episode, large fraction universe could have been endowed metallicity floor, Zmin 10-4 Z☉, already 15.
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