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Astrophysics

Title: Cosmological Reionization

Authors: Piero Madau
Abstract: 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 all-pervading intergalactic medium (IGM), which contains most of the ordinary baryonic material left over from the big bang. Throughout the epoch of structure formation, the IGM becomes clumpy and acquires peculiar motions under the influence of gravity, and acts as a source for the gas that gets accreted, cools, and forms stars within galaxies, and as a sink for the metal enriched material, energy, and radiation which they eject.
Comments: LateX, 13 pages, 4 figures, slightly revised version (corrected several typos), to appear in Phil. Trans. R. Soc. London A (2000) 358
Subjects: Astrophysics (astro-ph)
DOI: 10.1098/rsta.2000.0627
Cite as: arXiv:astro-ph/0003096
  (or arXiv:astro-ph/0003096v2 for this version)

Submission history

From: Piero Madau [view email]
[v1] Tue, 7 Mar 2000 14:38:29 GMT (122kb)
[v2] Wed, 10 May 2000 13:08:45 GMT (122kb)