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Cited by 420

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

Structure Formation with Generalized Dark Matter

Open access
Hu, Wayne·1998·The Astrophysical Journal
DOI 10.1086/306274
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Abstract

The next generation of cosmic microwave background (CMB) experiments, galaxy surveys, and high-redshift observations can potentially determine the nature of the dark matter observationally. With this in mind, we introduce a phenomenological model for a generalized dark matter (GDM) component and discuss its effect on large-scale structure and CMB anisotropies. Specifying the gravitational influence of the otherwise noninteracting GDM requires not merely a model for its equation of state but one for its full stress tensor. From consideration of symmetries, conservation laws, and gauge invariance, we construct a simple but powerful three-component parameterization of these stresses that exposes the new phenomena produced by GDM. Limiting cases include: a particle component (e.g., weakly interacting massive particles, radiation, or massive neutrinos), a cosmological constant, and a scalar field component. Intermediate cases illustrate how the clustering properties of the dark matter can be specified independently of its equation of state. This freedom allows one to alter the amplitude and features in the matter-power spectrum relative to those of the CMB anisotropies while leaving the background cosmology fixed. Conversely, observational constraints on such phenomena can help determine the nature of the dark matter.

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Metadata

Authors
Hu, W.
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
1998-10-20
Volume
506
Issue
2
Pages
485-494
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1086/306274
OpenAlex
W2111470484
Cited by
420
References
1
FWCI
3.57
Type
journal article
Language
en
Open access
bronze

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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