The imprint of cosmological non-Gaussianities on primordial structure formation

摘要: We study via numerical N-body/smoothed particle hydrodynamics chemistry simulations the effects of primordial non-Gaussianities on formation first stars and galaxies, investigate impact supernova feedback in cosmologies with different fNL. Density distributions are biased to higher values, so star consequent processes take place earlier high-fNL models later low-fNL ones. Mechanical is responsible for shocking evacuating gas from star-forming sites highly non-Gaussian cases because larger bias at high densities. Chemical translates into high-redshift metal filling factors that by some orders magnitude fNL, but converge within one Gyr, both Population III II-I stellar regimes. The efficient enrichment process, though, leads metallicities >rsim 10−2  Z⊙ redshift ∼9, almost independently dark-matter haloes directly reflected properties these haloes, as fNL show more concentrated profiles early times. Non-Gaussian signatures behaviour lost after takes introduces a significant degree turbulence chaotic motions. Despite this, our results support idea can be imprinted gaseous features structures Universe.