Ionization feedback mechanism in the recombination ERA of the universe

Details Ionization feedback mechanism in the recombination ERA of the universe Ionization feedback mechanism in the recombination ERA of the universe

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..76..235n&link_type=abstract

Astrophysics and Space Science, vol. 76, no. 1, May 1981, p. 235-254.

Astronomy and Astrophysics

Astrophysics

7

Cosmic Rays, Galactic Evolution, Gas Ionization, Hydrogen Recombinations, Universe, Adiabatic Conditions, Astronomical Models, Elementary Particle Interactions, Feedback, Linear Equations, Nonlinear Equations, Two Fluid Models

Scientific paper

The 2-fluid radiation hydrodynamics during and before the recombination era are investigated within the cosmological standard models of the universe. It is found that if all nonlinearities (with the exception of those contained in the coupling term between the two fluids) via the degree of ionization are neglected, there exists a strong feedback mechanism on the unstable modes which prevents them from growing if their relative amplitudes of density contrast have values on the order of 0.10-0.01. The nonlinear equations are solved numerically by an adiabatic elimination technique normally used in self-organization problems.

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