منابع مشابه
Effects of metal enrichment and metal cooling in galaxy growth and cosmic star formation history
We present the results of a numerical study on the effects of metal enrichment and metal cooling on galaxy formation and cosmic star formation (SF) history using cosmological hydrodynamic simulations. We find following differences in the simulation with metal cooling when compared to the run without it: (1) the cosmic star formation rate (SFR) is enhanced by about 50 & 20% at z = 1 & 3, respect...
متن کاملSimulations of Cosmic Chemical Enrichment
Using a new numerical model for cosmic chemical evolution, we study the influence of hypernova feedback on the star formation and metal enrichment history of the universe. For assumptions which produce plausible results in idealized collapse models of individual galaxies, our cosmological simulations of the standard ΛCDM cosmology show a peak of the cosmic star formation rate at z ∼ 4, with ∼ 1...
متن کاملMetal enrichment processes
There are many processes that can transport gas from the galaxies to their environment and enrich the environment in this way with metals. These metal enrichment processes have a large influence on the evolution of both the galaxies and their environment. Various processes can contribute to the gas transfer: ram-pressure stripping , galactic winds, AGN outflows, galaxy-galaxy interactions and o...
متن کاملCosmic evolution of metal densities: the enrichment of the Inter-Galactic Medium
By means of chemo-photometric models for galaxies of different morhological, we have carried out a detailed study of the history of element production by spheroidal and dwarf irregular galaxies. Spheroidal galaxies suffer a strong and intense star formation episode at early times. In dwarf irregulars, the SFR proceeds at a low regime but continuously. Both galactic types enrich the IGM with met...
متن کاملSimulations of Cosmic Chemical Enrichment with Hypernova
We simulate cosmic chemical enrichment with a hydrodynamical model including supernova and hypernova feedback. We find that the majority of stars in present-day massive galaxies formed in much smaller galaxies at high redshifts, despite their late assembly times. The hypernova feedback drives galactic outflows efficiently in low mass galaxies, and these winds eject heavy elements into the inter...
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ژورنال
عنوان ژورنال: Proceedings of the International Astronomical Union
سال: 2008
ISSN: 1743-9213,1743-9221
DOI: 10.1017/s1743921308024630