Tidal Tails Test the Equivalence Principle in the Dark Sector

Abstract

Satellite galaxies currently undergoing tidal disruption offer a unique opportunity to constrain an effective violation of the equivalence principle in the dark sector. Theories in which cold dark matter (CDM) couples to a light scalar field naturally lead to a long-range force between dark matter particles. An inverse-square-law force of this kind would manifest itself as a violation of the equivalence principle in the dynamics of CDM compared to baryons in the form of gas or stars. In a previous paper, we showed that an attractive force would displace stars outwards from the bottom of the satellite's gravitational potential well, leading to a higher fraction of stars being disrupted from the tidal bulge further from the Galactic center. Since stars disrupted from the far (near) side of the satellite go on to form the trailing (leading) tidal stream, an attractive dark-matter force will produce a relative enhancement of the trailing stream compared to the leading stream. This distinctive signature of a dark-matter force might be detected through detailed observations of the tidal tails of a disrupting satellite, such as those recently performed by the Two-Micron All-Sky Survey (2MASS) and Sloan Digital Sky Survey (SDSS) on the Sagittarius (Sgr) dwarf galaxy. Here we show that this signature is robust to changes in our models for both the satellite and Milky Way, suggesting that we might hope to search for a dark-matter force in the tidal features of other recently discovered satellite galaxies in addition to the Sgr dwarf.

arXiv comment29 pages, 13 figures, final version published in PRD

References in corpus (39)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The Structure of Cold Dark Matter Halos
• The cosmological simulation code GADGET-2
• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• Coupled Quintessence
• The Confrontation between General Relativity and Experiment
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: I. Morphology of the Sagittarius Core and Tidal Arms
• The MACHO Project: Microlensing Results from 5.7 Years of LMC Observations
• The Field of Streams: Sagittarius and its Siblings
• Non-Baryonic Dark Matter - Observational Evidence and Detection Methods
• Interacting Dark Matter and Dark Energy
• Great Circle tidal streams: evidence for a nearly spherical massive dark halo around the Milky Way
• Sagittarius: The Nearest Dwarf Galaxy
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: IV. Modeling the Sagittarius Tidal Tails
• Detection of a 63 Degree Cold Stellar Stream in the Sloan Digital Sky Survey
• The Void Phenomenon
• Galactic Halo substructure in the Sloan Digital Sky Survey: the ancient tidal stream from the Sagittarius dwarf galaxy
• The Disruption of the Sagittarius Dwarf Galaxy.
• Tracking and coupled dark energy as seen by WMAP
• Equilibrium Disk-Bulge-Halo Models for the Milky Way and Andromeda Galaxies
• Generating Equilibrium Dark Matter Halos: Inadequacies of the Local Maxwellian Approximation
• Detection of a 60 Degree-Long Dwarf Galaxy Debris Stream
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: III. Constraints on the Flattening of the Galactic Halo
• Baryon bias and structure formation in an accelerating universe
• Tidal Streams as Probes of the Galactic Potential
• The tidal stripping of satellites
• The importance of tides for the Local Group dwarf spheroidals
• The gravitational and hydrodynamical interaction between the LMC and the Galaxy
• Simple dynamical models of the Sagittarius dwarf galaxy
• Structure Formation With a Long-Range Scalar Dark Matter Interaction
• POINT-AGAPE Pixel Lensing Survey of M31 : Evidence for a MACHO contribution to Galactic Halos
• Galilean Equivalence for Galactic Dark Matter
• Structure formation in a string-inspired modification of the cold dark matter model
• Cosmology with a dynamically screened scalar interaction in the dark sector
• Mass functions in coupled Dark Energy models
• Limits on deviations from the inverse-square law on megaparsec scales
• Tidal streams in a MOND potential: constraints from Sagittarius

Cited by in corpus (109)

• Dark Matter and Dark Radiation
• Dark Energy-Dark Matter Interaction and putative violation of the Equivalence Principle from the Abell Cluster A586
• Early dark energy from massive neutrinos -- a natural resolution of the Hubble tension
• Effects of the interaction between dark energy and dark matter on cosmological parameters
• The speed of the `bullet' in the merging galaxy cluster 1E0657-56
• Equivalence Principle Implications of Modified Gravity Models
• Hydrodynamical N-body simulations of coupled dark energy cosmologies
• Quantum Tests of the Einstein Equivalence Principle with the STE-QUEST Space Mission
• Constraining Interactions in Cosmology's Dark Sector
• Signature of the interaction between dark energy and dark matter in galaxy clusters
• N-Body Simulations for Coupled Scalar Field Cosmology
• Make Dark Matter Charged Again
• Time dependent couplings in the dark sector: from background evolution to nonlinear structure formation
• Coupled dark matter-dark energy in light of near Universe observations
• What can Cosmology tell us about Gravity? Constraining Horndeski with Sigma and Mu
• Velocities as a probe of dark sector interactions
• The Abell Cluster A586 and the Detection of the Equivalence Principle
• Quantum Field Theory of Interacting Dark Matter/Dark Energy: Dark Monodromies
• Signatures of Self-Interacting dark matter on cluster density profile and subhalo distributions
• $H_0$ Tension, Swampland Conjectures and the Epoch of Fading Dark Matter
• Structure Formation by Fifth Force I: N-Body vs. Linear Simulations
• Preparing for low surface brightness science with the Vera C. Rubin Observatory: characterisation of tidal features from mock images
• Tests of Modified Gravity with Dwarf Galaxies
• Dark-Matter Decays and Self-Gravitating Halos
• N-body Simulations for Extended Quintessence Models
• Neutrino-Assisted Early Dark Energy: Theory and Cosmology
• Phenomenology of theories of gravity without Lorentz invariance: the preferred frame case
• Unveiling dark fifth forces with linear cosmology
• Dark-Matter-Induced Weak Equivalence Principle Violation
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Structure Formation by the Fifth Force III: Segregation of Baryons and Dark Matter
• Testing Lorentz invariance of dark matter
• Stellar streams as gravitational experiments II. Asymmetric tails of globular cluster streams
• Non-universal scalar-tensor theories and big bang nucleosynthesis
• Cosmology with Equivalence Principle Breaking in the Dark Sector
• Stellar streams as gravitational experiments I. The case of Sagittarius
• Very large scale structures in growing neutrino quintessence
• The Tidal Streams of Disrupting Subhaloes in Cosmological Dark Matter Haloes
• Dark Matter Gravitational Clustering With a Long-Range Scalar Interaction
• Quintessence with Yukawa Interaction
• Chameleons in the Early Universe: Kicks, Rebounds, and Particle Production
• Dark Energy, the Swampland and the Equivalence Principle
• Galaxy Satellites and the Weak Equivalence Principle
• Structure Formation by Fifth Force: Power Spectrum from N-Body Simulations
• Stability of scalar perturbations in scalar-torsion $f(T,\varphi )$ gravity theories in the presence of a matter fluid
• The Impact of Coupled Dark Energy Cosmologies on the High-Redshift Intergalactic Medium
• Implications of a Scalar Dark Force for Terrestrial Experiments
• Chameleon Gravity, Electrostatics, and Kinematics in the Outer Galaxy
• Higher-order coupled quintessence
• Weak lensing predictions for coupled dark energy cosmologies at non-linear scales
• Galactic Dark Matter Population as the Source of Neutrino Masses
• DM haloes in the fifth-force cosmology
• Long range dark matter self-interactions and plasma instabilities
• Unveiling dark forces with measurements of the Large Scale Structure of the Universe
• Levitating Dark Matter
• Orbital decay of Globular Clusters in the galaxy with little dark matter
• Astrophysical Tests of Dark Matter Self-Interactions
• Three-dimensional structure of the Sagittarius dSph core from RR Lyrae
• Mass freezing in growing neutrino quintessence
• Quantum Fine-Tuning in Stringy Quintessence Models
• The Abnormally Weighting Energy Hypothesis: the Missing Link between Dark Matter and Dark Energy
• Variation of $\alpha$ from a Dark Matter Force
• The cosmological constant problem: a user's guide
• Dark Matter Halos from the Inside Out
• Hubble tension as a window on the gravitation of the dark matter sector
• Tachyons in General Relativity
• From 100 kpc to 10 Gpc: Dark Matter self-interactions before and after DESI
• Charged Dark Matter and the $H_0$ tension
• Modifying Gravity at Low Redshift
• Simulations of structure formation in interacting dark energy cosmologies
• An Environmental Variation of Constants
• Dark Matter Astrophysics
• Reconstructing the interaction between the dark matter and holographic dark energy
• Generalizing the Cosmic Energy Equation
• Accurate Computation of the Screening of Scalar Fifth Forces in Galaxies
• Test of the Equivalence Principle in the Dark Sector on Galactic Scales
• Extended Chameleons
• Hubble tension as a window on the gravitation of the dark matter sector: Exploration of a family of models
• Cosmological effects of coupled dark matter
• Interacting holographic tachyon model of dark energy
• Structure and evolution of Zel'dovich pancakes as probes of dark energy models
• Do Bound Structures Brake Cosmic Acceleration?
• New Interpretations of the Cosmological Preference for a Negative Neutrino Mass
• Are symmetric tidal streams possible with long-range dark-matter forces?
• Thermalization, Fragmentation and Tidal Disruption: The Complex Galactic Dynamics of Dark Matter Superfluidity
• The CIDER simulations: Nonlinear structure formation in the Constrained Interacting Dark Energy Scenario
• Dark matter repulsion could thwart direct detection
• Baryogenesis via Dark Matter-Induced Symmetry Breaking in the Early Universe
• Forays into the dark side of the swamp
• Interacting dark energy collapse with matter components separation
• Constraints on Late Time Violations of the Equivalence Principle in the Dark Sector
• Static structure of chameleon dark Matter as an explanation of dwarf spheroidal galactic core
• Stellar Streams in Chameleon Gravity
• Coherent Self-Interactions of Dark Matter in the Bullet Cluster
• Eternal vs singular observers in interacting dark energy-dark matter models
• Evanescent Matter
• Probing Long-Range Forces Between Neutrinos with Cosmic Structures
• Interacting non-minimally coupled canonical, phantom and quintom models of holographic dark energy in non-flat universe
• Hint of dark matter-dark energy interaction in DESI DR2 and current cosmological dataset?
• Theory of interacting vector dark energy and fluid
• Indirect Signals of Dark Matter Can Change Depending on Where You Look
• Solving an Interacting Quintessence Model with a Sound Horizon Initial Condition and its Observational Constraints
• Exploring Ultralight Scalar Assistance in Sterile Neutrino Dark Matter: Cold Spectrum and Unusual X/Gamma-ray Signatures
• Constraining Violations of the Weak Equivalence Principle in the Dark Sector
• Tritium beta decay with modified neutrino dispersion relations: KATRIN in the dark sea
• Interacting Quintessence and Growth of Structure
• Interactions and Instabilities in Cosmology's Dark Sector
• Fundamental Symmetries of the Early Universe and the Precision Frontier
• Dark Energy Simulations