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Cited by 423

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The Density Profiles of the Dark Matter Halo Are Not Universal

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Jing, Y. P., Suto, Yasushi·2000·The Astrophysical Journal

Abstract

We perform a series of high-resolution N-body simulations designed to examine the density profiles of dark matter halos. From 12 simulated halos ranging in mass from 2x1012 to 5x1014 h-1 M middle dot in circle (represented by approximately 1 million particles within the virial radius), we find a clear systematic correlation between the halo mass and the slope of the density profile at 1% of the virial radius, in addition to the variations of the slope among halos of similar mass. More specifically, the slope is approximately -1.5, -1.3, and -1.1 for galaxy-, group-, and cluster-mass halos, respectively. While we confirm the earlier simulation results that the inner slope is steeper than the universal profile originally proposed by Navarro, Frenk, & White, this mass dependence is inconsistent with several analytical arguments attempting to link the inner slope with the primordial index of the fluctuation spectrum. Thus, we conclude that the dark matter density profiles, especially in the inner region, are not universal.

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Metadata

Authors
Jing, Y. P., & Suto, Y.
Venue
The Astrophysical Journal
Published
2000-02-01
Volume
529
Issue
2
Pages
L69-L72
ISSN
0004-637X (ISSN-L)
OpenAlex
W2949078855
Cited by
423
References
20
FWCI
33.59
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: The Density Profiles of the Dark Matter Halo Are Not Universal. https://app.cochat.ai/papers/10.1086/312463
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Jing, Y. P., & Suto, Y. (2000). The Density Profiles of the Dark Matter Halo Are Not Universal. The Astrophysical Journal. https://doi.org/10.1086/312463

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