Evolution of adiabatic perturbations in a photino-dominated universe

Details Evolution of adiabatic perturbations in a photino-dominated universe Evolution of adiabatic perturbations in a photino-dominated universe

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...143...94v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 143, no. 1, Feb. 1985, p. 94-98.

Statistics

Computation

2

Big Bang Cosmology, Elementary Particles, Galactic Clusters, Perturbation Theory, Universe, Adiabatic Conditions, Computational Astrophysics, Field Theory (Physics), Galactic Evolution, Mass Distribution, Mass To Light Ratios

Scientific paper

The author presents the results of numerical computations for the linear evolution of adiabatic perturbations in a photino (X) dominated universe. The integration runs from early redshift (zin = 109) down to recombination. The X perturbations are treated according to a Boltzmann-Liouville approach, while matter and radiation perturbations are treated according to an ideal fluid approximation. A comparison of the observed clustering with the computed mass variances shows that a photino-dominated universe with mx ≅ 2 keV and n = 0 or n = 1 as spectral index for the initial X perturbation, might be favoured over a neutrino-dominated universe, where only spectra with n > 2 would be allowed.

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