Simulating Observations of Dark Matter Dominated Galaxies: Towards the Optimal Halo Profile

Abstract

Low Surface Brightness (LSB) galaxies are dominated by dark matter, and their rotation curves thus reflect their dark matter distribution. Recent high-resolution rotation curves suggest that their dark matter mass-density distributions are dominated by a constant-density core. This seems inconsistent with the predictions of Cold Dark Matter (CDM) models which produce halos with compact density cusps and steep mass-density profiles. However, the observationally determined mass profiles may be affected by non-circular motions, asymmetries and offsets between optical and dynamical centres, all of which tend to lower the observed slopes. Here we determine the impact of each of these effects on a variety of halo models, and compare the results with observed mass-density profiles. Our simulations suggest that no single systematic effect can reconcile the data with the cuspy CDM halos. The data are best described by a model with a soft core with an inner power-law mass-density slope alpha = -0.2 +/- 0.2. However, no single universal halo profile provides a completely adequate description of the data.

Accepted for publication in MNRAS; small problem with figure numbering fixed

References in corpus (25)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Profiles of dark haloes: evolution, scatter, and environment
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• Cold collapse and the core catastrophe
• Concentrations of Dark Halos from their Assembly Histories
• Resolving the Structure of Cold Dark Matter Halos
• Analytical Models For Galactic Nuclei
• H alpha rotation curves of Low Surface Brightness galaxies
• Mass Density Profiles of LSB Galaxies
• The dark and baryonic matter content of low surface brightness disk galaxies
• The Central Mass Distribution in Dwarf and Low Surface Brightness Galaxies
• The Cores of Dark Matter Dominated Galaxies: theory vs. observations
• The Dark Matter Distribution in Disk Galaxies
• Bar-Halo Interaction and Bar Growth
• HI observations of low surface brightness galaxies: Probing low-density galaxies
• Dwarf Galaxy Rotation Curves and the Core Problem of Dark Matter Halos
• High-resolution rotation curves of low surface brightness galaxies: Data
• A High-Resolution Rotation Curve of NGC 6822: A Test-case for Cold Dark Matter
• Halpha rotation curves: the soft core question
• Accurate Determination of the Mass Distribution in Spiral Galaxies: II. Testing the Shape of Dark Halos
• Evidence of self-interacting cold dark matter from galactic to galaxy cluster scales
• Kinematically Lopsided Spiral Galaxies
• The constant density region of the dark halos of spiral galaxies
• Modelling the Interstellar Medium of Low Surface Brightness Galaxies: Constraining Internal Extinction, Disk Color Gradients, and Intrinsic Rotation Curve Shapes

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