Dark Matter Annihilation Feedback in Cosmological Simulations II: The Influence on Gas and Halo Structure

Abstract

We present new cosmological hydrodynamic simulations that incorporate Dark Matter Annihilation Feedback (DMAF), whereby energy released from the annihilation of dark matter particles through decay channels such as photon or positron-electron pairs provide additional heating sources for local baryonic material. For annihilation rates comparable to WIMP-like particles, we find that the key influence of DMAF is to inhibit gas accretion onto halos. Such diminished gas accretion early in the lifetimes of halos results in reduced gas fractions in smaller halos, and the delayed halo formation times of larger structures, suggesting that DMAF could impact the stellar age distribution in galaxies, and morphology of dwarfs. For a dark matter particle mass of $m_{\chi }\sim 10$~MeV, there is a `critical halo mass' of $\sim 10^{13}$ M${}_{\odot }$ at $z=0$, below which there are large differences when compared to $\Lambda$CDM, such as a reduction in the abundance of halo structures as large as 25 percent, reduced gas content by 50 percent and central gas densities reduced down to 10 percent within halos of mass $\sim 10^{12}$ M${}_{\odot }$ but with increasing effects in smaller halos. Higher dark matter particle mass models have a smaller `critical halo mass'. For a $m_{\chi }\sim 100$~MeV model, we find differences start appearing below halo masses of $\sim 10^{12}$ M${}_{\odot }$ and a $m_{\chi }\gtrsim 1$~GeV model, this mass scale lies below the resolution of our simulations, though we still observe changes in the morphology of dwarf galaxies.

arXiv comment16 pages, 12 figures

References in corpus (83)

• Planck 2015 results. XIII. Cosmological parameters
• The Structure of Cold Dark Matter Halos
• Dark Matter Substructure in Galactic Halos
• Where are the missing galactic satellites?
• Observational evidence for self-interacting cold dark matter
• Cold and Fuzzy Dark Matter
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Physical Models of Galaxy Formation in a Cosmological Framework
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Astrophysics Source Code Library
• GIZMO: A New Class of Accurate, Mesh-Free Hydrodynamic Simulation Methods
• Dark Matter Self-interactions and Small Scale Structure
• The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
• A universal angular momentum profile for galactic halos
• Reionization and the abundance of galactic satellites
• How supernova feedback turns dark matter cusps into cores
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Halo concentrations in the standard LCDM cosmology
• Reconciling dwarf galaxies with LCDM cosmology: Simulating a realistic population of satellites around a Milky Way-mass galaxy
• The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
• Stellar Feedback in Galaxies and the Origin of Galaxy-scale Winds
• Searching for Dark Matter Annihilation in Recently Discovered Milky Way Satellites with Fermi-LAT
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• Hydrodynamic Simulations of Galaxy Formation. II. Photoionization and the Formation of Low Mass Galaxies
• High-resolution mass models of dwarf galaxies from LITTLE THINGS
• The Cores of Dark Matter Dominated Galaxies: theory vs. observations
• Dark matter cores all the way down
• Updated Search for Spectral Lines from Galactic Dark Matter Interactions with Pass 8 Data from the Fermi Large Area Telescope
• NIHAO IV: Core creation and destruction in dark matter density profiles across cosmic time
• A Comparison of Methods for Determining the Molecular Content of Model Galaxies
• The role of stellar feedback in the formation of galaxies
• Dwarf galaxies in voids: Suppressing star formation with photo-heating
• The Photo-Evaporation of Dwarf Galaxies During Reionization
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• Is dark matter with long-range interactions a solution to all small-scale problems of ΛCDM cosmology?
• FIRE in the Field: Simulating the Threshold of Galaxy Formation
• Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter
• Formation and structure of ultralight bosonic dark matter halos
• Effects of cold dark matter decoupling and pair annihilation on cosmological perturbations
• GeV-Scale Thermal WIMPs: Not Even Slightly Dead
• A Necessary Condition for Individual Time-Steps in SPH Simulations
• Implementation of feedback in SPH: towards concordance of methods
• Cannibal Dark Matter
• Model-Independent Indirect Detection Constraints on Hidden Sector Dark Matter
• Sussing Merger Trees: The Merger Trees Comparison Project
• The Caterpillar Project: A Large Suite of Milky Way Sized Halos
• All about baryons: revisiting SIDM predictions at small halo masses
• Novel cosmic-ray electron and positron constraints on MeV dark matter particles
• Cold keV dark matter from decays and scatterings
• Cosmological particle-in-cell simulations with ultralight axion dark matter
• SIDM on FIRE: Hydrodynamical Self-Interacting Dark Matter simulations of low-mass dwarf galaxies
• Thermal Dark Matter Below an MeV
• Constraining dark matter late-time energy injection: decays and p-wave annihilations
• The impact of dark matter decays and annihilations on the formation of the first structures
• AX-GADGET: a new code for cosmological simulations of Fuzzy Dark Matter and Axion models
• nIFTy galaxy cluster simulations I: dark matter & non-radiative models
• Tidal disruption of fuzzy dark matter subhalo cores
• Enhanced tidal stripping of satellites in the galactic halo from dark matter self-interactions
• Prospects for indirect dark matter searches with MeV photons
• The impact of Early Dark Energy on non-linear structure formation
• Matter Power Spectrum in Hidden Neutrino Interacting Dark Matter Models: A Closer Look at the Collision Term
• Dark matter self-interactions from the internal dynamics of dwarf spheroidals
• Suppressing structure formation at dwarf galaxy scales and below: late kinetic decoupling as a compelling alternative to warm dark matter
• Peaks above the Maxwellian Sea: A New Approach to Finding Substructure in N-Body Haloes
• SURFS: Riding the waves with Synthetic UniveRses For Surveys
• nIFTy galaxy cluster simulations II: radiative models
• nIFTy Galaxy Cluster simulations IV: Quantifying the Influence of Baryons on Halo Properties
• The roles of stellar feedback and galactic environment in star forming molecular clouds
• nIFTY galaxy cluster simulations III: The Similarity & Diversity of Galaxies & Subhaloes
• Streams Going Notts: The tidal debris finder comparison project
• Constraint on the velocity dependent dark matter annihilation cross section from Fermi-LAT observations of dwarf galaxies
• Extending Fermi-LAT and H.E.S.S. Limits on Gamma-ray Lines from Dark Matter Annihilation
• p-wave Annihilating Dark Matter from a Decaying Predecessor and the Galactic Center Excess
• Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
• A dark matter model that reconciles tensions between the cosmic-ray $e^{\pm }$ excess and the gamma-ray and CMB constraints
• nIFTy galaxy cluster simulations V: Investigation of the Cluster Infall Region
• Effect of dark matter annihilation on gas cooling and star formation
• Pressure from dark matter annihilation and the rotation curve of spiral galaxies
• Consequences of dark matter self-annihilation for galaxy formation
• Dark Matter Annihilation in the Circumgalactic Medium at High Redshifts
• Dark Matter Annihilation Feedback in cosmological simulations I: Code convergence and idealised halos
• Dark matter line searches towards dwarf galaxies with H.E.S.S

Cited by in corpus (4)

• A black box for dark sector physics: Predicting dark matter annihilation feedback with conditional GANs
• Lux ex tenebris: The imprint of annihilating dark matter on the intergalactic medium during Cosmic Dawn
• A Novel Scheme for Dark Matter Annihilation Feedback in Cosmological Simulations
• Linearity: galaxy formation encounters an unanticipated empirical relation