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Title:
Seeded hot dark matter models with inflation
Authors:
Gratsias, John; Scherrer, Robert J.; Steigman, Gary; Villumsen, Jens V.
Affiliation:
AA(Ohio State University, Columbus), AB(Ohio State University, Columbus), AC(Ohio State University, Columbus), AD(Ohio State University, Columbus)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 1, p. 30-33. (ApJ Homepage)
Publication Date:
03/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Astronomical Models, Dark Matter, Inflating, Neutrinos, Universe, Density Distribution, Power Spectra
DOI:
10.1086/172339
Bibliographic Code:
1993ApJ...405...30G

Abstract

We examine massive neutrino (hot dark matter) models for large-scale structure in which the density perturbations are produced by randomly distributed relic seeds and by inflation. Power spectra, streaming velocities, and the Sachs-Wolfe quadrupole fluctuation are derived for this model. We find that the pure seeded hot dark matter model without inflation produces Sachs-Wolfe fluctuations far smaller than those seen by COBE. With the addition of inflationary perturbations, fluctuations consistent with COBE can be produced. The COBE results set the normalization of the inflationary component, which determines the large-scale (about 50/h Mpc) streaming velocities. The normalization of the seed power spectrum is a free parameter, which can be adjusted to obtain the desired fluctuations on small scales. The power spectra produced are very similar to those seen in mixed hot and cold dark matter models.

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