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The Astrophysical Journal
Article . 1988 . Peer-reviewed
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Gravitational accretion of hot dark matter

Authors: York H. Dobyns;

Gravitational accretion of hot dark matter

Abstract

A major difficulty with hot dark matter models, namely their extremely large clustering scales, can be alleviated if small-scale clustering is produced by accretion around a perturbing mass that is not itself composed of dark matter. This paper reports a numerical simulation of such a perturbing mass immersed in a background of hot dark matter. It is found that such accretion can produce a system similar to observed galactic halos with a power law density function proportional to r exp -beta, where beta = 2.05 + or - 0.05. This is a closer fit to the behavior of actual dark halos than any available cold dark matter model produces. If the initial perturbation has mass of roughly five billion solar, the circular velocity for stable orbits is roughly 250 km/s at 5-10 kpc radius and remains almost constant to a halo radius of roughly 320 kpc, which is a reasonable fit for a large isolated spiral galaxy. 9 references.

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    9
    popularity
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    influence
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
9
Average
Average
Top 10%
gold