Primordial density fluctuations and the structure of galactic haloes

Details Primordial density fluctuations and the structure of galactic haloes Primordial density fluctuations and the structure of galactic haloes

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.322..329q&link_type=abstract

Nature (ISSN 0028-0836), vol. 322, July 24, 1986, p. 329-335.

Statistics

Computation

117

Cosmology, Density Distribution, Galactic Structure, Halos, Universe, Astronomical Models, Computational Astrophysics, Disk Galaxies, Galactic Rotation, Many Body Problem, Power Spectra

Scientific paper

N-body models used to study the formation of structure in Omega = 1 universes reveal that the mass profiles of the collapsed structures - galactic haloes - are intimately related to the power spectrum of initial, Gaussian, density perturbations. In particular, flat rotation curves observed in disk galaxies are obtained only when the exponent of the power law is, on the megaparsec scale, less than -1, but not as small as -3. These results have important implications for various cosmological models.

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