Reionization and Cosmic Microwave Anisotropies

Details Reionization and Cosmic Microwave Anisotropies Reionization and Cosmic Microwave Anisotropies

1993-10-29

arxiv.org/abs/astro-ph/9310051v1

Astronomy and Astrophysics

Astrophysics

10 pages, compressed uuencoded postscript (without figures), CfPA-TH-93-28

Scientific paper

10.1086/187122

The effects of reionization, occurring after standard recombination in cold dark matter-dominated models, on CMB anisotropies are investigated. Late-time reionization reduces the CMB anisotropies, in particular, on degree scales. It is found that constraints on cold dark matter-dominated models from the highest frequency channel of the 9-point South Pole data are significantly relaxed for models which are consistent with Big Bang nucleosynthesis if reionization is assumed to have occurred by redshift $\sim 20.$

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