Baryonic Pinching of Galactic Dark Matter Halos

Abstract

High resolution cosmological N-body simulations of four galaxy-scale dark matter halos are compared to corresponding N-body/hydrodynamical simulations containing dark matter, stars and gas. The simulations without baryons share features with others described in the literature in that the dark matter density slope continuously decreases towards the center, with a density ρ~r^{-1.3+/-0.2}, at about 1% of the virial radius for our Milky Way sized galaxies. The central cusps in the simulations which also contain baryons steepen significantly, to ρ~r^{-1.9+/-0.2}, with an indication of the inner logarithmic slope converging. Models of adiabatic contraction of dark matter halos due to the central build-up of stellar/gaseous galaxies are examined. The simplest and most commonly used model, by Blumenthal et al., is shown to overestimate the central dark matter density considerably. A modified model proposed by Gnedin et al. is shown to be a considerable improvement, but not perfect. Moreover it is found that the contraction parameters not only depend on the orbital structure of the dark-matter-only halos but also on the stellar feedback prescription which is most relevant for the baryonic distribution. Implications for dark matter annihilation at the galactic center are discussed and it is found that although our simulations show a considerable reduced halo contraction as compared to the Blumenthal et al. model, the fluxes from dark matter annihilation is still expected to be enhanced by at least a factor of a hundred as compared to dark-matter-only halos. Finally, it is shown that while dark-matter-only halos are typically prolate, the dark matter halos containing baryons are mildly oblate with minor-to-major axis ratios of c/a=0.73+/-0.11, with their flattening aligned with the central baryonic disks.

arXiv comment16 pages, 14 figures and 8 tables. Minor text improvements, typo corrections and an updated reference list to match the published version

References in corpus (40)

• The Structure of Cold Dark Matter Halos
• Profiles of dark haloes: evolution, scatter, and environment
• Cold collapse and the core catastrophe
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
• Response of dark matter halos to condensation of baryons: cosmological simulations and improved adiabatic contraction model
• The Field of Streams: Sagittarius and its Siblings
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• Rotation Curves of Spiral Galaxies
• Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
• Dark matter annihilation at the galactic center
• LCDM-based models for the Milky Way and M31 I: Dynamical Models
• Forming Disk Galaxies in Lambda CDM Simulations
• Dark Matter Halos within Clusters
• The spin and shape of dark matter haloes in the Millennium simulation of a LambdaCDM universe
• Resolving the Structure of Cold Dark Matter Halos II
• Internal and External Alignment of the Shapes and Angular Momenta of LCDM Halos
• Mass models of the Milky Way
• The Effect of Gas Cooling on the Shapes of Dark Matter Halos
• A Dark-Matter Spike at the Galactic Center?
• Galaxy Formation: CDM, Feedback and the Hubble Sequence
• The Effect of Dissipation on the Shapes of Dark halos
• Structure of Dark Matter Halos From Hierarchical Clustering
• Cusps in CDM halos
• Time-Dependent Models for Dark Matter at the Galactic Center
• A Self-Consistent Dynamical Model for the COBE Detected Galactic Bar
• The Compression of Dark Matter Halos by Baryonic Infall
• Is there Evidence for Flat Cores in the Halos of Dwarf Galaxies?: The Case of NGC 3109 and NGC 6822
• Astrophysical inputs on the SUSY dark matter annihilation detectability
• Where are the ``Missing'' Galactic Baryons?
• The Robustness of Dark Matter Density Profiles in Dissipationless Mergers
• Structure of Dark Matter Halos From Hierarchical Clustering. III. Shallowing of The Inner Cusp
• EGRET Excess of Diffuse Galactic Gamma Rays as Tracer of Dark Matter
• The Validity of the Adiabatic Contraction Approximation for Dark Matter Halos
• Bars and Cold Dark Matter Halos
• Adiabatic compression and indirect detection of supersymmetric dark matter
• Is the dark matter interpretation of the EGRET gamma excess compatible with antiproton measurements?
• Modelling the Milky Way through adiabatic compression of cold dark matter halo
• Halo Geometry and Dark Matter Annihilation Signal
• Disk Galaxy Rotation Curves in Triaxial CDM Halos

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