Escalating core formation with dark matter self-heating

Abstract

Exothermic scatterings of dark matter (DM) produce DM particles with significant kick velocities inside DM halos. In collaboration with DM self-interaction, the excess kinetic energy of the produced DM particles is distributed to the others, which self-heats the DM particles as a whole. The DM self-heating is efficient towards the halo center, and the heat injection is used to enhance the formation of a uniform density core inside halos. The effect of DM self-heating is expected to be more significant in smaller halos for two reasons: 1) the exothermic cross section times the relative velocity, $⟨{\sigma }_{\mathrm{exo}}{v}_{\mathrm{rel}}⟩$, is constant; 2) and the ratio of the injected heat to the velocity dispersion squared gets larger towards smaller halos. For the first time, we quantitatively investigate the core formation from DM self-heating for halos in a wide mass range ($10^9$-$10^{15}{\mathrm{M}}_{\odot }$) using the gravothermal fluid formalism. Notably, we demonstrate that the core formation is sharply escalating towards smaller halos by taking the self-heating DM (i.e., DM that semi-annihilates and self-interacts) as an example. We show that the sharp escalation of core formation may cause a tension in simultaneously explaining the observed central mass deficit of Milky Way satellites, and field dwarf/low surface brightness spiral galaxies. While the details of the self-heating effect may differ among models, we expect that the sharp halo-mass dependence of the core formation is a general feature of exothermic DM.

arXiv comment6+4 pages, 6 figures

References in corpus (61)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• Observational evidence for self-interacting cold dark matter
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Dark Matter Self-interactions and Small Scale Structure
• Cold dark matter haloes in the Planck era: evolution of structural parameters for Einasto and NFW profiles
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• The Waning of the WIMP? A Review of Models, Searches, and Constraints
• Observational and Theoretical Constraints on Singular Dark Matter Halos
• Accurate masses for dispersion-supported galaxies
• A Method for Measuring (Slopes of) the Mass Profiles of Dwarf Spheroidal Galaxies
• H alpha rotation curves of Low Surface Brightness galaxies
• The cored distribution of dark matter in spiral galaxies
• WIMP dark matter candidates and searches - current status and future prospects
• Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
• Mass Density Profiles of LSB Galaxies
• The dependence of dark matter profiles on the stellar to halo mass ratio: a prediction for cusps vs cores
• The Observed properties of Dark Matter on small spatial scales
• The unexpected diversity of dwarf galaxy rotation curves
• Dark Matter Benchmark Models for Early LHC Run-2 Searches: Report of the ATLAS/CMS Dark Matter Forum
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• Halo Shape and Relic Density Exclusions of Sommerfeld-Enhanced Dark Matter Explanations of Cosmic Ray Excesses
• High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
• Core Formation in Dwarf Halos with Self Interacting Dark Matter: No Fine-Tuning Necessary
• The Dark Matter Distribution in the Central Regions of Galaxy Clusters
• The Dark Matter Distribution in the Central Regions of Galaxy Clusters: Implications for CDM
• Limits to dark matter annihilation cross-section from a combined analysis of MAGIC and Fermi-LAT observations of dwarf satellite galaxies
• Dissipative hidden sector dark matter
• A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
• Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector
• The Density Profiles of Massive, Relaxed Galaxy Clusters. II. Separating Luminous and Dark Matter in Cluster Cores
• The Cosmology of Atomic Dark Matter
• Atomic Dark Matter
• Self-Interacting Dark Matter Halos and the Gravothermal Catastrophe
• Viscoelastic hydrodynamics and holography
• Gravitational probes of dark matter physics
• Search for new physics in final states with an energetic jet or a hadronically decaying W or Z boson and transverse momentum imbalance at $\sqrt{s}=$ 13 TeV
• Gravothermal collapse of isolated self-interacting dark matter haloes: N-body simulation versus the fluid model
• Supermassive Black Holes from Ultra-Strongly Self-Interacting Dark Matter
• Evidence of self-interacting cold dark matter from galactic to galaxy cluster scales
• Constraining Dissipative Dark Matter Self-Interactions
• Scattering properties of dark atoms and molecules
• Accelerated core collapse in tidally stripped self-interacting dark matter halos
• Gravothermal Collapse of Self-Interacting Dark Matter Halos and the Origin of Massive Black Holes
• Formation and Evolution of the Self-Interacting Dark Matter Halos
• SIMPle Dark Matter: Self-Interactions and keV Lines
• Self-Scattering for Dark Matter with an Excited State
• An X-Ray Line from eXciting Dark Matter
• Hidden Sector Hydrogen as Dark Matter: Small-scale Structure Formation Predictions and the Importance of Hyperfine Interactions
• Evaporating the Milky Way halo and its satellites with inelastic self-interacting dark matter
• Velocity Dependence from Resonant Self-Interacting Dark Matter
• Self-interacting inelastic dark matter: A viable solution to the small scale structure problems
• Self-interacting Dark Matter Without Direct Detection Constraints
• Is Self-Interacting Dark Matter Undergoing Dark Fusion?
• Self-heating dark matter via semi-annihilation
• Finite-size dark matter and its effect on small-scale structure
• Cosmological Structure Formation in Decaying Dark Matter Models
• Self-heating of Strongly Interacting Massive Particles
• New Dissipation Mechanisms from Multi-level Dark Matter Scattering
• Core formation from self-heating dark matter

Cited by in corpus (14)

• Dark Matter and the XENON1T electron recoil excess
• Maximally self-interacting dark matter: models and predictions
• Semi-annihilating $Z_3$ Dark Matter for XENON1T Excess
• Dianoga SIDM: galaxy cluster self-interacting dark matter simulations
• Dark matter freeze-in from semi-production
• Constraints on electron-scattering interpretation of XENON1T excess
• Manifesting hidden dynamics of a sub-component dark matter
• Constraints on dark matter self-interaction from galactic core size
• Earth Shielding and Daily Modulation from Electrophilic Boosted Dark Particles
• Black Holes as Fermion Factories
• Semi-annihilating dark matter coupled with Majorons
• Late-Time Dark Matter Oscillations and the Core-Cusp Problem
• Cored Dark Matter halos in the Cosmic Neutrino Background
• Dark matter haloes in the multicomponent model. III. From dwarfs to galaxy clusters