Early reionization by decaying particles and cosmic microwave background radiation

Details Early reionization by decaying particles and cosmic microwave background radiation Early reionization by decaying particles and cosmic microwave background radiation

2004-09-16

arxiv.org/abs/astro-ph/0409419v2

Phys.Rev. D70 (2004) 103519

Astronomy and Astrophysics

Astrophysics

5 pages, 5 figures, fig 2, table 1, and some typos are corrected

Scientific paper

10.1103/PhysRevD.70.103519

We study the reionization scenario in which ionizing UV photons emitted from decaying particle, in addition to usual contributions from stars and quasars, ionize the universe. It is found that the scenario is consistent with both the first year data of the Wilkinson Microwave Anisotropy Probe and the fact that the universe is not fully ionized until z \sim 6 as observed by Sloan Digital Sky Survey. Likelihood analysis revealed that rather broad parameter space can be chosen. This scenario will be discriminated by future observations, especially by the EE polarization power spectrum of cosmic microwave background radiation.

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