Missing mass in the Universe: the evolution of adiabatic perturbations during the hydrogen recombenation epoch Journal Article uri icon

Overview

abstract

  • The role of possible relict carriers of missing mass in the Universe (massive neutrino, primordial black holes (PBH); supermassive neutral leptons, etc.) is analyzed in the dynamics of pregalactic inhomogeneity evolution in the period of hydrogen cosmological recombination. The dissipative effects are numerically analyzed by means of the equations obtained by the authors for the model of three component medium (baryons, radiation, hardly observable particles), and the field of plasma velocities is calculated at the moment of substance-from-radiation decoupling. It is shown that for the model with three types of massive neutrinos (νsub(e), νsub(μ), νsub(tau)), being equal in mass (approximately 30 eV) and thermodynamic concentration, the level of plasma disturbances in redshifts z approximately 103 das not exceed 0.1%. If the background of relict gravitational particles is determined by stable supermassive lePTONS OR PBH, this restriction is reduced by one more order. It is shown that the effect amplitude modulation of the short-wave portion of inhomogeneity spectrum occurs in the recombination and postrecombination phases of perturbation evolution, which is explained by the gravitational influence of collisional matter density perturbations

publication date

  • January 1, 1985

Full Author List

  • Zabotin NA; Nasel'skij PD

Additional Document Info

start page

  • 639

end page

  • 650

volume

  • 62

issue

  • 4