Cosmological reionization
نویسندگان
چکیده
منابع مشابه
Cosmological Reionization
In popular cosmological scenarios, some time beyond a redshift of 10, stars within protogalaxies created the first heavy elements; these systems, together perhaps with an early population of quasars, generated the ultraviolet radiation and mechanical energy that reheated and reionized the cosmos. The history of the Universe during and soon after these crucial formative stages is recorded in the...
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I use cosmological simulations that incorporate a physically motivated approximation to three-dimensional radiative transfer that recovers correct asymptotic ionization front propagation speeds for some cosmologically relevant density distributions to investigate the process of the reionization of the universe by ionizing radiation from proto-galaxies. Reionization proceeds in three stages and ...
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We investigate the dependence of the epoch of reionization on the properties of cosmological perturbations, in the context of cosmologies permitted by WMAP. We compute the redshift of reionization using a simple model based on the Press–Schechter approximation. For a power-law initial spectrum we estimate that reionization is likely to occur at a redshift zreion = 17+10 −7 , consistent with the...
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ژورنال
عنوان ژورنال: Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
سال: 2000
ISSN: 1364-503X,1471-2962
DOI: 10.1098/rsta.2000.0627