Cited by 164Galaxies: Formation, Evolution, PhenomenaCosmology and Gravitation TheoriesDark Matter and Cosmic Phenomena

The Compression of Dark Matter Halos by Baryonic Infall

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Sellwood, J. A., McGaugh, Stacy S.·2005·The Astrophysical Journal

Abstract

The initial radial density profiles of dark matter halos are laid down by gravitational collapse in hierarchical structure formation scenarios and are subject to further compression as baryons cool and settle to the halo centers. Here we describe an explicit implementation of the algorithm, originally developed by Young, to calculate changes to the density profile as the result of adiabatic infall in a spherical halo model. Halos with random motion are more resistant to compression than are those in which random motions are neglected, which is a key weakness of the simple method widely employed. Young's algorithm results in density profiles in excellent agreement with those from N -body simulations. We show how the algorithm can be applied to determine the original uncompressed halos of real galaxies, a step that must be computed with care in order to enable a confrontation with theoretical predictions from theories such as ΛCDM.

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Crossref · 10.1086/491731

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61 of 61 references verified0 citation errors · 0 not checkable

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  • The response of the DM halo to the assembly of its galaxy can be predicted to good approximation using the adiabatic contraction method with same action integrals.

    “The response of the DM halo to the assembly of its galaxy can be predicted to good approximation using the adiabatic contraction method in which the DM distribution is assumed to have the same action integrals in the hydrodynamic run as in the DMO case (Sellwood & McGaugh 2005; Callingham et al. 2020”

    From The milky way total mass profile as inferred from Gaia DR2 (2020) · cites this paper as Sellwood & McGaugh 2005

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Authors
Sellwood, J. A., & McGaugh, S. S.
Affiliations
  • Rutgers, The State University of New Jersey (US)
  • University of Maryland, College Park (US)
Venue
The Astrophysical Journal
Published
2005-11-20
Volume
634
Issue
1
Pages
70-76
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W2023518980
Cited by
164
References
61
Citations by year
2026: 3 · 2025: 6 · 2024: 3 · 2023: 8 · 2022: 4 · 2021: 7 · 2020: 19 · 2019: 5 · 2018: 4 · 2017: 1 · 2016: 6 · 2015: 8 · 2014: 12 · 2013: 7 · 2012: 8
FWCI
6.40
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Scholarly Commons @ Case Western Reserve University (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
Keywords
dark matter halos, halo density profiles, hierarchical structure formation, random motion, galaxy halos

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