A New Force in the Dark Sector?

Abstract

We study the kinematics of dark matter using the massive cluster of galaxies 1E0657-56. The velocity of the "bullet" subcluster has been measured by X-ray emission from the shock front, and the masses and separation of the main and sub-clusters have been measured by gravitational lensing. The velocity with gravity alone is calculated in a variety of models of the initial conditions, mass distribution and accretion history; it is much higher than expected, by at least 2.4 sigma. The probability of so large a subcluster velocity in cosmological simulations is <~ 10^{-7}. A long range force with strength ~ 0.4 - 1.2 times that of gravity would provide the needed additional acceleration.

4 pp -- updated to final version which will appear in March 30, 2007 Phys. Rev. Lett. Changes are minor, mainly additional references

References in corpus (18)

• Simulating the joint evolution of quasars, galaxies and their large-scale distribution
• Chameleon Cosmology
• Chandra sample of nearby relaxed galaxy clusters: mass, gas fraction, and mass-temperature relation
• 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
• Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
• Interacting Dark Matter and Dark Energy
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: IV. Modeling the Sagittarius Tidal Tails
• The Void Phenomenon
• CAIRNS: The Cluster And Infall Region Nearby Survey I. Redshifts and Mass Profiles
• Statistics of Physical Properties of Dark Matter Clusters
• Modeling Galaxy-Mass Correlations in Dissipationless Simulations
• Structure Formation With a Long-Range Scalar Dark Matter Interaction
• Effects of asphericity and substructure on the determination of cluster mass with weak gravitational lensing
• Voids in the Simulated Local Universe
• How Rare is the Bullet Cluster?
• The Formation Histories of Galaxy Clusters
• The Peculiar Velocity Function of Galaxy Clusters

Cited by in corpus (58)

• What does the Bullet Cluster tell us about self-interacting dark matter?
• The speed of the `bullet' in the merging galaxy cluster 1E0657-56
• Cosmic clocks, cosmic variance and cosmic averages
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• Colliding clusters and dark matter self-interactions
• Constraining Interactions in Cosmology's Dark Sector
• N-Body Simulations for Coupled Scalar Field Cosmology
• Simulating the Bullet Cluster
• Time dependent couplings in the dark sector: from background evolution to nonlinear structure formation
• Bullet Cluster: A Challenge to LCDM Cosmology
• Local Voids as the Origin of Large-angle Cosmic Microwave Background Anomalies: The Effect of a Cosmological Constant
• The CoDECS project: a publicly available suite of cosmological N-body simulations for interacting dark energy models
• The Abell Cluster A586 and the Detection of the Equivalence Principle
• On Dark Peaks and Missing Mass: A Weak Lensing Mass Reconstruction of the Merging Cluster System Abell 520
• Structure Formation by Fifth Force I: N-Body vs. Linear Simulations
• N-body Simulations for Extended Quintessence Models
• Statistics of extreme objects in the Juropa Hubble Volume simulation
• The collision velocity of the bullet cluster in conventional and modified dynamics
• Structure Formation by the Fifth Force III: Segregation of Baryons and Dark Matter
• Testing Lorentz invariance of dark matter
• Measuring Gravitational Redshifts in Galaxy Clusters
• Very large scale structures in growing neutrino quintessence
• Dark Matter Gravitational Clustering With a Long-Range Scalar Interaction
• The halo mass function in interacting Dark Energy models
• On the Effects of Coupled Scalar Fields on Structure Formation
• Gravitational Redshift of Galaxies in Clusters from the Sloan Digital Sky Survey and the Baryon Oscillation Spectroscopic Survey
• Structure Formation by Fifth Force: Power Spectrum from N-Body Simulations
• The Bullet Cluster is not a Cosmological Anomaly
• Stability of scalar perturbations in scalar-torsion $f(T,\varphi )$ gravity theories in the presence of a matter fluid
• Enhanced Peculiar Velocities in Brane-Induced Gravity
• Modified Kepler's Law, Escape Speed and Two-body Problem in MOND-like Theories
• Weak lensing predictions for coupled dark energy cosmologies at non-linear scales
• DM haloes in the fifth-force cosmology
• Galactic Dark Matter Population as the Source of Neutrino Masses
• Levitating Dark Matter
• Hierarchy of N-point functions in the LCDM and ReBEL cosmologies
• Bullet Clusters in the MareNostrum Universe
• Connection between a possible fifth force and the direct detection of Dark Matter
• How rare is the Bullet Cluster (in a $\Lambda$CDM universe)?
• Back-in-time dynamics of the cluster IE 0657-56 (the Bullet System)
• Effective Theory for Dark Matter and a New Force in the Dark Matter Sector
• Boosting hierarchical structure formation with scalar-interacting dark matter
• Variation of $\alpha$ from a Dark Matter Force
• Tangential Velocity of the Dark Matter in the Bullet Cluster from Precise Lensed Image Redshifts
• The mass and the coupling of the Dark Particle
• Radial structure, inflow & central mass of stationary radiative galaxy clusters
• Simulations of structure formation in interacting dark energy cosmologies
• The MeSsI (Merging Systems Identification) Algorithm & Catalogue
• Structure and evolution of Zel'dovich pancakes as probes of dark energy models
• Modified Baryonic Dynamics: two-component cosmological simulations with light sterile neutrinos
• Non-Minimal Quintessence With Nearly Flat Potential
• Dark matter repulsion could thwart direct detection
• The abundance of Bullet-groups in LCDM
• Interacting dark energy collapse with matter components separation
• Coherent Self-Interactions of Dark Matter in the Bullet Cluster
• Cluster Merger Shock Constraints on Particle Acceleration and Nonthermal Pressure in the Intracluster Medium
• Extended Void Merging Tree Algorithm for Self-Similar Models
• Merger of massive galaxy cluster CL0238.3+2005 at z~0.4: just after pericenter passage?