The local dark matter distribution in self-interacting dark matter halos

Abstract

We study the effects of dark matter self-interactions on the local dark matter distribution in selected Milky Way-like galaxies in the EAGLE hydrodynamical simulations. The simulations were run with two different self-interacting dark matter models, a constant and velocity-dependent self-interaction cross-section. We find that the local dark matter velocity distribution of the Milky Way-like halos in the simulations with dark matter self-interactions and baryons are generally similar to those extracted from cold collisionless dark matter simulations with baryons. In both cases, the local dark matter speed distributions agree well with their best fit Maxwellian distributions. Including baryons in the simulations with or without dark matter self-interactions increases the local dark matter density and shifts the dark matter speed distributions to higher speeds. To study the implications for direct detection, we compute the dark matter halo integrals obtained directly from the simulations and compare them to those obtained from the best fit Maxwellian velocity distribution. We find that a Maxwellian distribution provides a good fit to the halo integrals of most halos, without any significant difference between the results of different dark matter self-interaction models.

39 pages, 12 figures, 15 tables

References in corpus (77)

• A Universal Density Profile from Hierarchical Clustering
• Planck 2013 results. XVI. Cosmological parameters
• The cosmological simulation code GADGET-2
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Profiles of dark haloes: evolution, scatter, and environment
• Observational evidence for self-interacting cold dark matter
• Local Kinematics and the Local Standard of Rest
• The Aquarius Project: the subhalos of galactic halos
• Cold and Fuzzy Dark Matter
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Properties of galaxies reproduced by a hydrodynamic simulation
• Dark Matter Self-interactions and Small Scale Structure
• The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
• The Diversity and Similarity of Simulated Cold Dark Matter Halos
• Warm Dark Matter as a solution to the small scale crisis: new constraints from high redshift Lyman-alpha forest data
• The Core-Cusp Problem
• Mass models of the Milky Way
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• The statistics of LCDM Halo Concentrations
• The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
• Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
• A novel determination of the local dark matter density
• The unexpected diversity of dwarf galaxy rotation curves
• A direct dynamical measurement of the Milky Way's disk surface density profile, disk scale length, and dark matter profile at 4 kpc < R < 9 kpc
• Constraining Self-Interacting Dark Matter with the Milky Way's dwarf spheroidals
• The dark matter density at the Sun's location
• The Dark Matter Halo of the Milky Way, AD 2013
• On the local dark matter density
• Why Baryons Matter: The Kinematics of Dwarf Spheroidal Satellites
• Core Formation in Dwarf Halos with Self Interacting Dark Matter: No Fine-Tuning Necessary
• The RAVE survey: the Galactic escape speed and the mass of the Milky Way
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• Too Big to Fail in the Local Group
• Determination of the Local Dark Matter Density in our Galaxy
• What does the Bullet Cluster tell us about self-interacting dark matter?
• Constraining the Galaxy's dark halo with RAVE stars
• Dark Matter distribution in the Milky Way: microlensing and dynamical constraints
• Evidence for dark matter in the inner Milky Way
• Dynamical constraints on the dark matter distribution in the Milky Way
• The mass of the Milky Way from satellite dynamics
• Annual Modulation of Dark Matter in the Presence of Streams
• A new determination of the local dark matter density from the kinematics of K dwarfs
• The Gravitational Potential Near the Sun From SEGUE K-dwarf Kinematics
• Spreading out and staying sharp - Creating diverse rotation curves via baryonic and self-interaction effects
• On the estimation of the Local Dark Matter Density using the rotation curve of the Milky Way
• Baryonic impact on the dark matter distribution in Milky Way-size galaxies and their satellites
• The escape speed curve of the Galaxy obtained from Gaia DR2 implies a heavy Milky Way
• Constraining Velocity-dependent Self-Interacting Dark Matter with the Milky Way's dwarf spheroidal galaxies
• Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
• The local high velocity tail and the Galactic escape speed
• Dark Halos of M31 and the Milky Way
• Too Big To Fail in Light of Gaia
• Simulated Milky Way analogues: implications for dark matter direct searches
• Constraints on the properties of warm dark matter using the satellite galaxies of the Milky Way
• Self-Interacting Dark Matter Subhalos in the Milky Way's Tides
• Using Gaia DR2 to Constrain Local Dark Matter Density and Thin Dark Disk
• Slicing and dicing the Milky Way disk in SDSS
• The diverse density profiles of galaxy clusters with self-interacting dark matter plus baryons
• Substructure of fuzzy dark matter haloes
• Direct detection of self-interacting dark matter
• Simulated Milky Way analogues: implications for dark matter indirect searches
• Diversity in density profiles of self-interacting dark matter satellite halos
• The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles
• How to Reconcile the Observed Velocity Function of Galaxies with Theory
• Assessing Astrophysical Uncertainties in Direct Detection with Galaxy Simulations
• The impact of baryons on the direct detection of dark matter
• The central densities of Milky Way-mass galaxies in cold and self-interacting dark matter models
• Implications of hydrodynamical simulations for the interpretation of direct dark matter searches
• Galaxy Formation: Warm Dark Matter, Missing Satellites, and the Angular Momentum Problem
• Predictably Missing Satellites: Subhalo Abundance in Milky Way-like Halos
• The dark matter component of the Gaia radially anisotropic substructure
• The Core-Cusp Problem Revisited: ULDM vs. CDM
• Unraveling the interplay between SIDM and baryons in MW halos: defining where baryons dictate heat transfer
• Informing dark matter direct detection limits with the ARTEMIS simulations
• Notes on the Missing Satellites Problem
• Constraints on dark matter self-interaction from galactic core size

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• Exploring Self-Interacting Dark Matter Halos with Diverse Baryonic Distributions: A Parametric Approach
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