Cusp-core problem and strong gravitational lensing

Abstract

Cosmological numerical simulations of galaxy formation have led to the cuspy density profile of a pure cold dark matter halo toward the center, which is in sharp contradiction with the observations of the rotation curves of cold dark matter-dominated dwarf and low surface brightness disk galaxies, with the latter tending to favor mass profiles with a flat central core. Many efforts have been devoted to resolve this cusp-core problem in recent years, among them, baryon-cold dark matter interactions are considered to be the main physical mechanisms erasing the cold dark matter (CDM) cusp into a flat core in the centers of all CDM halos. Clearly, baryon-cold dark matter interactions are not customized only for CDM-dominated disk galaxies, but for all types, including giant ellipticals. We first fit the most recent high resolution observations of rotation curves with the Burkert profile, then use the constrained core size-halo mass relation to calculate the lensing frequency, and compare the predicted results with strong lensing observations. Unfortunately, it turns out that the core size constrained from rotation curves of disk galaxies cannot be extrapolated to giant ellipticals. We conclude that, in the standard cosmological paradigm, baryon-cold dark matter interactions are not universal mechanisms for galaxy formation, and therefore, they cannot be true solutions to the cusp-core problem.

11 pages, 3 figures, references updated, typos corrected

References in corpus (71)

• A Universal Density Profile from Hierarchical Clustering
• Weak Gravitational Lensing
• Mass function of dark matter halos
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• The Inner Structure of LambdaCDM Halos III: Universality and Asymptotic Slopes
• Triaxial Modeling of Halo Density Profiles with High-resolution N-body Simulations
• H alpha rotation curves of Low Surface Brightness galaxies
• The cored distribution of dark matter in spiral galaxies
• Mass Density Profiles of LSB Galaxies
• Dark Matter Scaling Relations
• Is There A Cosmological Constant?
• The Central Mass Distribution in Dwarf and Low Surface Brightness Galaxies
• The Cosmic Lens All-Sky Survey: I. Source selection and observations
• Dark Halos: The Flattening of the Density Cusp by Dynamical Friction
• Stellar Feedback in Dwarf Galaxy Formation
• The Universal Rotation Curve of Spiral Galaxies. II The Dark Matter Distribution out to the Virial Radius
• The Cosmic Lens All-Sky Survey:II. Gravitational lens candidate selection and follow-up
• High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
• Mass Models for Low Surface Brightness Galaxies with High Resolution Optical Velocity Fields
• The density profile of equilibrium and non-equilibrium dark matter halos
• Dwarf Galaxy Rotation Curves and the Core Problem of Dark Matter Halos
• High-resolution rotation curves of low surface brightness galaxies: Data
• NGC 3741: dark halo profile from the most extended rotation curve
• Bar-driven dark halo evolution: a resolution of the cusp--core controversy
• Gravitational Lensing as a Probe of Quintessence
• Limits on Cosmological Models From Radio-Selected Gravitational Lenses
• Erasing Dark Matter Cusps in Cosmological Galactic Halos with Baryons
• A High-Resolution Rotation Curve of NGC 6822: A Test-case for Cold Dark Matter
• Constraints on Cosmological Parameters from the Analysis of the Cosmic Lens All Sky Survey Radio-Selected Gravitational Lens Statistics
• CDM and Strong Lensing: Concord or Conflict?
• Angular Momentum Transfer in Dark Matter Halos: Erasing the Cusp
• The dwarf galaxy DDO 47 as a dark matter laboratory: testing cusps hiding in triaxial halos
• The Cosmic Lens All-Sky Survey: statistical strong lensing, cosmological parameters, and global properties of galaxy populations
• What is the largest Einstein radius in the universe?
• Semi-Analytical Models for Lensing by Dark Halos: I. Splitting Angles
• Constraints on Chaplygin quartessence from the CLASS gravitational lens statistics and supernova data
• The Importance of Lens Galaxy Environments
• The Robustness of Dark Matter Density Profiles in Dissipationless Mergers
• Bar-Induced Evolution of Dark Matter Cusps
• A model for the postcollapse equilibrium of cosmological structure: truncated isothermal spheres from top-hat density perturbations
• Cores of Dark Matter Halos Correlate with Disk Scale Lengths
• The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical Lens Sample from the Third Data Release
• Phase-space mixing and the merging of cusps
• The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog
• The Postcollapse Equilibrium Structure of Cosmological Haloes in a Low-Density Universe
• Gravitational Lensing Limits on Cold Dark Matter and Its Variants
• Strong Gravitational Lensing and Dark Energy
• Strong Gravitational Lensing Time Delay Statistics and the Density Profile of Dark Halos
• A combined analysis of cluster mass estimates from strong lensing, X-ray measurement and the universal density profile
• Active galactic nuclei and massive galaxy cores
• Strong lensing probability for testing TeVeS theory
• Lensing and the Centers of Distant Early-Type Galaxies
• Cosmological constraints from lensing statistics and supernovae on the cosmic equation of state
• Gravitational Lensing Magnification and Time Delay Statistics for Distant Supernovae
• $f(R)$ gravity theories in the Palatini Formalism constrained from strong lensing
• Cosmological Parameters from the SDSS DR5 Velocity Dispersion Function of Early-Type Galaxies through Radio-Selected Lens Statistics
• Strong gravitational lensing and galactic bulges
• Rethinking Lensing and Lambda
• Optimal Weak Lensing Skewness Measurements
• Gravitational Lensing by a Compound Population of Halos: Standard Models
• Strong gravitational lensing: why no central black holes?
• Flux-limited strong gravitational lensing and dark energy
• Gravitational Lensing by Dark Matter Halos with Non-universal Density Profiles
• How many arcminute-separation lenses are expected in the 2dF QSO survey?
• Discovery of four gravitational lensing systems by clusters in the SDSS DR6
• Nonsingular density profiles of dark matter halos and Strong gravitational lensing
• The amplitude of mass fluctuations and mass density of the Universe constrained by strong gravitational lensing
• Signatures of the Baryon Acoustic Oscillations on the Convergence Power Spectrum of Weak lensing by Large Scale Structure
• Gravitational Lensing by Burkert Halos
• Constraining Dark Energy From Splitting Angle Statistic of Strong Gravitational Lenses
• Weak lensing of the Sunyaev-Zel'dovich sky

Cited by in corpus (12)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Analytical properties of Einasto dark matter haloes
• The nature of the Diffuse Gamma-Ray Background
• Corrective effect of many-body interactions in dynamical friction
• Non-minimally coupled dark matter: effective pressure and structure formation
• Automated Lensing Learner: Automated Strong Lensing Identification with a Computer Vision Technique
• Lensing clusters of galaxies in the SDSS-III
• On Wave Dark Matter, Shells in Elliptical Galaxies, and the Axioms of General Relativity
• Contradiction between strong lensing statistics and a feedback solution to the cusp/core problem
• Baryon effects on the dark matter halos constrained from strong gravitational lensing
• CMB Tensor Anisotropies in f(R) Gravity