Ionization history of the cosmic plasma in the light of the recent CBI and future PLANCK data

Details Ionization history of the cosmic plasma in the light of the recent CBI and future PLANCK data Ionization history of the cosmic plasma in the light of the recent CBI and future PLANCK data

2002-08-06

arxiv.org/abs/astro-ph/0208114v2

Astrophys.J. 586 (2003) 709-717

Astronomy and Astrophysics

Astrophysics

25 pages, 7 figures, extended and corrected after the referee report. Accepted in ApJ

Scientific paper

10.1086/367819

The paper is devoted to the methods of determination of the cosmological parameters from recent CMB observations. We show that the more complex models of kinetics of recombination with a few "missing" parameters describing the recombination process provide better agreement between measured and expected characteristics of the CMB anisotropy. In particular, we consider the external sources of the Ly-{alpha} and Ly-{c} radiation and the model with the strong clustering of baryonic component. These factors can constrain the estimates of the cosmological parameters usually discussed. We demonstrate also that the measurements of polarization can improve these estimates and, for the precision expected for the PLANCK mission, allow to discriminate a wide class of models.

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