Topology of large-scale structure in seeded hot dark matter models

Details Topology of large-scale structure in seeded hot dark matter models Topology of large-scale structure in seeded hot dark matter models

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...387..443b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 387, March 10, 1992, p. 443-448.

Astronomy and Astrophysics

Astrophysics

8

Dark Matter, Elementary Particles, Galactic Clusters, Space Density, Astronomical Models, Density Distribution, Neutrinos, Power Spectra, Topology

Scientific paper

The topology of the isodensity surfaces in seeded hot dark matter models, in which static seed masses provide the density perturbations in a universe dominated by massive neutrinos is examined. When smoothed with a Gaussian window, the linear initial conditions in these models show no trace of non-Gaussian behavior for r0 equal to or greater than 5 Mpc (h = 1/2), except for very low seed densities, which show a shift toward isolated peaks. An approximate analytic expression is given for the genus curve expected in linear density fields from randomly distributed seed masses. The evolved models have a Gaussian topology for r0 = 10 Mpc, but show a shift toward a cellular topology with r0 = 5 Mpc; Gaussian models with an identical power spectrum show the same behavior.

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