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2001ApJ...553..499O - Astrophys. J., 553, 499-512 (2001/June-1)
Reionization by hard photons. I. X-rays from the first star clusters.
OH S.P.
Abstract (from CDS):
Owing to their large mean free path, these X-rays can quickly establish a universal ionizing background and partially reionize the universe in a gradual, homogeneous fashion. If X-rays formed the dominant ionizing background, the universe would have more closely resembled a single-phase medium rather than a two-phase medium.
X-rays can reheat the universe to higher temperatures than possible with UV radiation.
X-rays counter the tendency of UV radiation to photodissociate H2, an important coolant in the early universe, by promoting gas-phase H2 formation.
Abstract Copyright: ∼
Journal keyword(s): Cosmology: Theory - Galaxies: Formation - Galaxies: Intergalactic Medium
Simbad objects: 6
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