Statistics – Computation
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...140l..27b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 140, no. 2, Nov. 1984, p. L27-L30.
Statistics
Computation
18
Cosmology, Dark Matter, Mass Distribution, Matter (Physics), Relic Radiation, Universe, Anisotropy, Computational Astrophysics, Gravitinos
Scientific paper
The authors give the results of detailed computations of small-scale fluctuations in the MW background for flat models of the universe, dominated either by massive 'neutrinos' (m = 32 eV) or by low-mass 'photino' or 'gravitinos' (m = 880 eV). They consider different values for the spectral index of primeval fluctuations and normalize the results to the mean mass variance δM/M. The authors find that a 'neutrino' dominated model can be in conflict with MW observational limits, if δM/M, on the smallest scales, is 1 at a redshift znl > 3.4. The 'photino' or 'gravitino' dominated cases are in conflict with observations only if znl > 10 (for spectral index n = -1) or for even higher znl if n > -1. In this case the dependence on n is much stronger than in the neutrino case.
Bonometto Silvio A.
Lucchin Francesco
Valdarnini Riccardo
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