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arXiv:astro-ph/9904159 (astro-ph)
[Submitted on 13 Apr 1999]

Title:On the structure and nature of dark matter halos

Authors:Andreas Burkert (MPIA, Heidelberg), Joseph Silk (NAPL, Oxford and Univ. of California, Berkeley)
View a PDF of the paper titled On the structure and nature of dark matter halos, by Andreas Burkert (MPIA and 4 other authors
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Abstract: The structure of dark matter halos as predicted from cosmological models is discussed and compared with observed rotation curves of dark matter-dominated dwarf galaxies. The theoretical models predict that dark matter halos represent a one-parameter family with a universal density profile. Observations of dark matter-dominated rotation curves indeed confirm the universal structure of dark halos. They are even in excellent agreement with the expected mass-radius scaling relations for the currently favoured cosmological model (standard cold dark matter with Omega_0=0.25 and Omega_{Lambda}=0.75). The rotation profiles however disagree with the predicted dark matter density distributions. Secular processes which might affect the inner halo structure do not seem to provide a good solution to this problem. We discuss, as an alternative, the possibility that dark halos consist of two separate components, a dark baryonic and a dark non-baryonic component.
Comments: 12 pages, Latex-file, 3 postscript files. To appear in proceedings of the second international conference on "Dark matter in astro and particle physics", ed. H.V. Klapdor-Kleingrothaus
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/9904159
  (or arXiv:astro-ph/9904159v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/9904159
arXiv-issued DOI via DataCite

Submission history

From: Andreas Burkert [view email]
[v1] Tue, 13 Apr 1999 08:32:57 UTC (45 KB)
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