Statistics – Computation
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983phrvl..51..935m&link_type=abstract
Physical Review Letters (ISSN 0031-9007), vol. 51, Sept. 5, 1983, p. 935-938.
Statistics
Computation
83
Cluster Analysis, Cosmology, Galactic Evolution, Gravitinos, Covariance, Gravitons, Neutrinos, Nonlinear Systems, Photons
Scientific paper
Computer simulations of the evolution of an adiabatic, massive-neutrino-based (A) universe and a universe based on axions, gravitinos, or photinos (AGP) are discussed. A cloud-in-cell gravitational-clustering code on a 32-cubed mesh and a 'bent' power spectrum are employed in both simulations. Comparison of the two models shows that both A and AGP reproduce clustering behavior acceptably, but AGP alone predicts the onset of galaxy formation at Z greater than about 5. In the AGP universe, galaxy formation results from the collapse of small-scale perturbations, as in classical hierarchical-clustering theory, while large-scale coherent structures form as in the A universe. The AGP model is considered worthy of further investigation using higher-resolution computations.
Einasto Jaan
Klypin Anatoly
Melott Adrian L.
Saar Enn
Shandarin Sergei F.
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