MG15 - Talk detail

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Abstract

Understanding the causes of localized structures in dark matter appearance on the cosmological scales is not exhausted. This, apparently, is due not to the comprehensive consideration of the fact that in real Universe all substances in a certain way (at least, gravitationally) interact each other. In other words, not only dark matter affects on the dynamics of baryonic matter, but and contrary - baryonic matter has a significant influence on the dynamics of dark matter. The purpose of this paper is to study influence of primary baryonic matter in the form of cosmic plasma on the evolution of perturbations in dark matter, considered as the gas of WIMP particles. As a result, the non-stationary equations of WIMP-gas state for its ideal and real models are proposed; the WIMP-gas state parameter in the form of a power-law dependence on time put forward; a description of appearance the initial perturbations in the WIMP gas, which takes into account the influence of primary cosmic plasma and variability of the dark matter state parameter, is given; the regimes of perturbations’ evolution of non-baryonic matter, that describe their growth for various relation it components of its internal energy, were found; the size and mass of the initial perturbations in the WIMP-gas have been estimated. Obtained data complement the previously well-known results that found both within the framework of adiabatic perturbations theory and within the framework of hierarchical crowding model.

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