The collision velocity of the bullet cluster in conventional and modified dynamics

Abstract

We consider the orbit of the bullet cluster 1E 0657-56 in both CDM and MOND using accurate mass models appropriate to each case in order to ascertain the maximum plausible collision velocity. Impact velocities consistent with the shock velocity (~ 4700km/s) occur naturally in MOND. CDM can generate collision velocities of at most ~ 3800km/s, and is only consistent with the data provided that the shock velocity has been substantially enhanced by hydrodynamical effects.

arXiv comment8 pages, 4 figures, 1 table, accepted for publication in MNRAS

References in corpus (57)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• A direct empirical proof of the existence of dark matter
• Profiles of dark haloes: evolution, scatter, and environment
• Relativistic gravitation theory for the MOND paradigm
• Concentrations of Dark Halos from their Assembly Histories
• Direct constraints on the dark matter self-interaction cross-section from the merging galaxy cluster 1E0657-56
• Modified Newtonian Dynamics as an Alternative to Dark Matter
• Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
• The Baryonic Tully-Fisher Relation of Galaxies with Extended Rotation Curves and the Stellar Mass of Rotating Galaxies
• Modified Newtonian Dynamics in the Milky Way
• Modifying gravity with the Aether: an alternative to Dark Matter
• Strong and weak lensing united III: Measuring the mass distribution of the merging galaxy cluster 1E0657-56
• The speed of the `bullet' in the merging galaxy cluster 1E0657-56
• Clusters of galaxies with modified Newtonian dynamics (MOND)
• The published extended rotation curves of spiral galaxies: Confrontation with Modified Dynamics
• MOND and the "Dearth of Dark Matter in Ordinary Elliptical Galaxies"
• On the Proof of Dark Matter, the Law of Gravity and the Mass of Neutrinos
• Resolving the virial discrepancy in clusters of galaxies with modified Newtonian dynamics
• A Dark Core in Abell 520
• Discovery of a Ringlike Dark Matter Structure in the Core of the Galaxy Cluster Cl 0024+17
• Missing Mass in Collisional Debris from Galaxies
• Testing Modified Newtonian Dynamics with Low Surface Brightness Galaxies --Rotation curve fits-
• A tensor-vector-scalar framework for modified dynamics and cosmic dark matter
• Can Cosmic Structure form without Dark Matter?
• Tidal dwarf galaxies as a test of fundamental physics
• Geometrical Evidence for Dark Matter: X-ray Constraints on the Mass of the Elliptical Galaxy NGC 720
• The modified Newtonian dynamics-MOND-and its implications for new physics
• Confrontation of MOND with the rotation curves of early-type disc galaxies
• Insight into the baryon-gravity relation in galaxies
• New constraints on MOND from galaxy clusters
• Evolution of spiral galaxies in modified gravity
• Weak Lensing Analysis of the z~0.8 cluster CL 0152-1357 with the Advanced Camera for Surveys
• Cosmology with Modified Newtonian Dynamics (MOND)
• Problems for MOND in Clusters and the Ly-alpha Forest
• The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity
• Escaping from MOND
• Effects of asphericity and substructure on the determination of cluster mass with weak gravitational lensing
• Stability of disk galaxies in the modified dynamics
• How Rare is the Bullet Cluster?
• A New Force in the Dark Sector?
• Modified Newtonian Dynamics of Large Scale Structure
• The Cluster-Merger Shock in 1E 0657-56: Faster than the Speeding Bullet?
• X-ray Constraints on the Intrinsic Shapes and Baryon Fractions of Five Abell Clusters
• Neutrinos as cluster dark matter
• HST/Acs Weak-Lensing and Chandra X-Ray Studies of the High-Redshift Cluster MS 1054-0321
• Axisymmetric and triaxial MOND density-potential pairs
• Galaxy merging in MOND
• The formation of cosmic structure with modified Newtonian dynamics
• Loss of mass and stability of galaxies in MOND
• MOND and the mass discrepancies in tidal dwarf galaxies
• Dissipationless collapses in MOND
• Confrontation of MOND Predictions with WMAP First Year Data
• MOND rotation curves of very low mass spiral galaxies
• Galactic Halos in MONDian Cosmological Simulations
• The galaxy luminosity - size relation and selection biases in the Hubble Ultra Deep Field
• Analysis of galactic tides and stars on CDM microhalos
• The First Compact Objects in the $\Lambda$-dominated Universe

Cited by in corpus (39)

• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• Photon and Graviton Mass Limits
• Local-Group tests of dark-matter Concordance Cosmology: Towards a new paradigm for structure formation
• A Novel Test of the Modified Newtonian Dynamics with Gas Rich Galaxies
• Local Group Dwarf Spheroidals: Correlated Deviations from the Baryonic Tully-Fisher Relation
• Milky Way Mass Models and MOND
• A Tale of Two Paradigms: the Mutual Incommensurability of LCDM and MOND
• X-ray Group and cluster mass profiles in MOND: Unexplained mass on the group scale
• Dwarf Spheroidals in MOND
• MOND effects in the inner solar system
• On the observability of individual Population III stars and their stellar-mass black hole accretion disks through cluster caustic transits
• Nonlocal metric formulations of MOND with sufficient lensing
• A massive blow for $\Lambda$CDM $-$ the high redshift, mass, and collision velocity of the interacting galaxy cluster El Gordo contradicts concordance cosmology
• The Dynamics of Merging Clusters: A Monte Carlo Solution Applied to the Bullet and Musket Ball Clusters
• The abundance of galaxy clusters in MOND: Cosmological simulations with massive neutrinos
• The Dynamics of Subhalos in Warm Dark Matter Models
• Cosmological fluctuation growth in bimetric MOND
• Equilibrium configurations of 11eV sterile neutrinos in MONDian galaxy clusters
• Field equations and cosmology for a class of nonlocal metric models of MOND
• Dark Fluid: Towards a unification of empirical theories of galaxy rotation, Inflation and Dark Energy
• Galaxy Cluster Bulk Flows and Collision Velocities in QUMOND
• The Star Formation History and Dynamics of the Ultra-diffuse Galaxy Dragonfly 44 in MOND and MOG
• Modified Kepler's Law, Escape Speed and Two-body Problem in MOND-like Theories
• The ultra-diffuse dwarf galaxies NGC 1052-DF2 and 1052-DF4 are in conflict with standard cosmology
• Neutrinos as galactic dark matter in the Ursa Major galaxy group?
• Galactic orbital motions in the Dark Matter, MOdified Newtonian Dynamics and MOdified Gravity scenarios
• Physics of galactic colliders: high speed satellites in LCDM vs MONDian cosmology
• Radial structure, inflow & central mass of stationary radiative galaxy clusters
• The Double Galaxy Cluster Abell 2465 I. Basic Properties: Optical Imaging and Spectroscopy
• On the MOND External Field Effect in the Solar System
• Discovery of large scale shock fronts correlated with the radio halo and radio relic in the A2163 galaxy cluster
• On the separation between baryonic and dark matter: evidence for phantom dark matter?
• Hubble Constant, Lensing, and Time Delay in Relativistic MOND
• Dwarf Galaxies, MOND, and Relativistic Gravitation
• Dynamical analysis of the cluster pair: A3407 + A3408
• The survival of dynamical fossils in dwarf spheroidal galaxies in conventional and modified dynamics
• A Critique of Covariant Emergent Gravity
• On the problem of deformed spherical systems in Modified Newtonian Dynamics
• Tests of Modified Gravity Theories in the Solar System