Density spikes near black holes in self-interacting dark matter halos and indirect detection constraints

Abstract

Self-interacting dark matter (SIDM) naturally gives rise to a cored isothermal density profile, which is favored in observations of many dwarf galaxies. The dark matter distribution in the presence of a central black hole in an isothermal halo develops a density spike with a power law of $r^{-7/4}$, which is shallower than $r^{-7/3}$ as expected for collisionless dark matter (CDM). Thus, indirect detection constraints on dark matter annihilations from the density spike could be relaxed in SIDM. Taking the most dense satellite galaxy of the Milky Way Draco as an example, we derive upper limits on the annihilation cross section and the black hole mass for both SIDM and CDM halos. For the former case, Draco could host an intermediate mass black hole even if dark matter is composed of thermal relics. We further explore the constraints from the Milky Way and M87, which host supermassive black holes, and show the upper limits on the annihilation cross section are significantly weakened in SIDM. Our results also indicate that the Event Horizon Telescope could provide a unique test of SIDM spikes.

arXiv comment7 pages, 2 figures; published version

References in corpus (68)

• Planck 2015 results. XIII. Cosmological parameters
• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• The slope of the black-hole mass versus velocity dispersion correlation
• Monitoring stellar orbits around the Massive Black Hole in the Galactic Center
• First M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole
• Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits
• Dark Matter Self-interactions and Small Scale Structure
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Dark matter annihilation at the galactic center
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• Subhaloes in Self-Interacting Galactic Dark Matter Haloes
• Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
• Cosmological Simulations with Self-Interacting Dark Matter II: Halo Shapes vs. Observations
• Beyond Collisionless Dark Matter: Particle Physics Dynamics for Dark Matter Halo Structure
• Constraining Self-Interacting Dark Matter with the Milky Way's dwarf spheroidals
• Jet Launching Structure Resolved Near the Supermassive Black Hole in M87
• Halo Properties in Cosmological Simulations of Self-Interacting Cold Dark Matter
• A Dark-Matter Spike at the Galactic Center?
• The Black Hole Mass, Stellar M/L, and Dark Halo in M87
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• ETHOS - An Effective Theory of Structure Formation: Dark matter physics as a possible explanation of the small-scale CDM problems
• Dark Matter Spikes and Annihilation Radiation from the Galactic Center
• Dark Matter Profile in the Galactic Center
• Tying Dark Matter to Baryons with Self-interactions
• Evolution of the Dark Matter Distribution at the Galactic Center
• Strong constraints on self-interacting dark matter with light mediators
• Spreading out and staying sharp - Creating diverse rotation curves via baryonic and self-interaction effects
• The case for a cold dark matter cusp in Draco
• Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states
• 230 GHz VLBI observations of M87: event-horizon-scale structure at the enhanced very-high-energy $\gamma$-ray state in 2012
• 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
• Accelerated core collapse in tidally stripped self-interacting dark matter halos
• Too Big To Fail in Light of Gaia
• Galactic Center Gamma-Ray Excess from Dark Matter Annihilation: Is There A Black Hole Spike?
• Velocity-dependent Self-interacting Dark Matter from Groups and Clusters of Galaxies
• Gravothermal Collapse of Self-Interacting Dark Matter Halos and the Origin of Massive Black Holes
• Dark matter spikes in the vicinity of Kerr black holes
• Self-Interacting Dark Matter Subhalos in the Milky Way's Tides
• The diverse density profiles of galaxy clusters with self-interacting dark matter plus baryons
• Neutralino Annihilation at the Galactic Center Revisited
• Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galactic Center
• Diversity in density profiles of self-interacting dark matter satellite halos
• Seeding Supermassive Black Holes with Self-Interacting Dark Matter: A Unified Scenario with Baryons
• The impact of baryonic discs on the shapes and profiles of self-interacting dark matter halos
• Dark matter self-interactions from the internal dynamics of dwarf spheroidals
• The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles
• Velocity Dependence from Resonant Self-Interacting Dark Matter
• Dark matter annihilation near a black hole: plateau vs. weak cusp
• Limits on Supersymmetric Dark Matter From EGRET Observations of the Galactic Center Region
• Galactic Center Excess in Gamma Rays from Annihilation of Self-Interacting Dark Matter
• Early formation of supermassive black holes via dark matter self-interactions
• Weak annihilation cusp inside the dark matter spike about a black hole
• Self-interacting dark matter cusps around massive black holes
• Self-Interacting Dark Matter and the Origin of Ultra-Diffuse Galaxies NGC1052-DF2 and -DF4
• Signatures of Self-Interacting Dark Matter in the Matter Power Spectrum and the CMB
• Unique probe of dark matter in the core of M87 with the Event Horizon Telescope
• Self-interacting dark matter without prejudice
• Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy
• N-body simulations of dark matter with frequent self-interactions
• Estimating QCD uncertainties in Monte Carlo event generators for gamma-ray dark matter searches
• Self-interacting dark matter with a vector mediator: kinetic mixing with U(1)${}_{(B-L{)}_3}$ gauge boson
• Black Holes, Dark Matter Spikes, and Constraints on Simplified Models with $t$-Channel Mediators
• No WIMP Mini-Spikes in Dwarf Spheroidal Galaxies
• Faint Dark Matter Annihilation Signals and the Milky Way's Supermassive Black Hole
• Study of the very high energy gamma-ray spectrum from the Galactic Center and future prospects

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