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The primordial baryonic clouds and their contribution to the cosmic microwave background anisotropy and polarization formation
Authors:Pavel Naselsky  Igor Novikov
Institution:Theoretical Astrophysics Center, Juliane Maries Vej 30, DK-2100, Copenhagen, Denmark; Rostov State University, Zorge 5, 344090 Rostov-Don, Russia; University Observatory, Juliane Maries Vej 30, DK-2100, Copenhagen, Denmark; Astro-Space Center of Lebedev Physical Institute, Profsoyuznaya 84/32, Moscow, Russia; NORDITA, Blegdamsvej 17, DK-2100, Copenhagen, Denmark
Abstract:We discuss possible distortions of the ionization history of the Universe in a model with small-scale baryonic clouds. The corresponding scales of the clouds are much smaller than the typical galactic mass-scales. These clouds are considered in a framework of the cosmological model with isocurvature and adiabatic perturbations. In this model the baryonic clouds do not influence the cosmic microwave background anisotropy formation directly as additional sources of perturbations, but they can change the kinetics of the hydrogen recombination . We also study the corresponding distortions of the anisotropy and polarization power spectra in connection with the launched MAP and future Planck missions.
Keywords:cosmic microwave background
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