The Bullet Cluster is not a Cosmological Anomaly

Abstract

The Bullet Cluster (1E0657-56) merger is of exceptional interest for testing the standard cold-dark-matter plus cosmological constant cosmological model, and for investigating the possible existence of a long- or short-range "fifth-force" in the dark sector and possible need for modifications of general relativity or even of Newtonian gravity. The most recent previous simulations of the Bullet Cluster merger required an initial infall velocity far in excess of what would be expected within the standard cosmological model, at least in the absence of additional forces or modifications to gravity. We have carried out much more detailed simulations, making pixel-by-pixel fits to 2D data-maps of the mass distribution and X-ray emission, allowing for triaxial initial configurations and including MHD and cooling. Here, we compare the initial conditions of the Bullet Cluster merger to those in similar-mass merging clusters in the Horizon cosmological simulation. We conclude that the observed properties of the Bullet Cluster are completely consistent with Lambda-CDM.

arXiv comment7 pages, 4 figures

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Cited by in corpus (22)

• Dark Matter Self-interactions and Small Scale Structure
• Ultra-Light Dark Matter
• Theory of Dark Matter Superfluidity
• The rise and fall of a challenger: the Bullet Cluster in $\Lambda$ Cold Dark Matter simulations
• Simulating the galaxy cluster "El Gordo" and identifying the merger configuration
• MC${}^2$: Dynamical Analysis of the Merging Galaxy Cluster MACS J1149.5+2223
• Production of dark-matter bound states in the early universe by three-body recombination
• The velocity field in MOND cosmology
• How rare is the Bullet Cluster (in a $\Lambda$CDM universe)?
• Astrophysical Tests of Dark Matter Self-Interactions
• Multi-Phenomena Modeling of the New Bullet Cluster, ZwCl008.8+52, using N-body/hydrodynamical Simulations
• Gravitational potential and galaxy rotation curves in multi-fractional spacetimes
• Effects of Lens Motion and Uneven Magnification on Image Spectra
• Testing the Cubic Galileon Gravity model by the Milky Way rotation curve and SPARC data
• X-ray cluster cosmology
• Dissociation of dark matter and gas in cosmic large-scale structure
• The Double Galaxy Cluster Abell 2465 III. X-ray and Weak-lensing Observations
• Newtonian Fractional-Dimension Gravity and Galaxies without Dark Matter
• Constraining Merging Galaxy Clusters with X-ray and Lensing Simulations and Observations: The case of Abell 2146
• Search for dark matter in the framework of Einstein-Cartan gravity at the International Linear Collider (ILC)
• Search for dark matter production in association with the Z${}^{\prime }$ boson at the LHC in pp collisions at $\sqrt{s}$ = 8 TeV using Monte Carlo simulations
• Search for the production of dark fermion candidates in association with heavy neutral gauge boson decaying to dimuon in proton-proton collisions at $\sqrt{s}=8$ TeV using the CMS open data