Modelling self-interacting dark matter substructures I: Calibration with N-body simulations of a Milky-Way-sized halo and its satellite

Abstract

We study evolution of single subhaloes with their masses of $\sim 10^9{M}_{\odot }$ in a Milky-Way-sized host halo for self-interacting dark matter (SIDM) models. We perform dark-matter-only N-body simulations of dynamical evolution of individual subhaloes orbiting its host by varying self-scattering cross sections (including a velocity-dependent scenario), subhalo orbits, and internal properties of the subhalo. We calibrate a gravothermal fluid model to predict time evolution in spherical mass density profiles of isolated SIDM haloes with the simulations. We find that tidal effects of SIDM subhaloes can be described with a framework developed for the case of collision-less cold dark matter (CDM), but a shorter typical time scale for the mass loss due to tidal stripping is required to explain our SIDM simulation results. As long as the cross section is less than $\sim 10{\mathrm{cm}}^2/\mathrm{g}$ and initial states of subhaloes are set within a $2\sigma$-level scatter at redshifts of $\sim 2$ predicted by the standard $\Lambda$CDM cosmology, our simulations do not exhibit a prominent feature of gravothermal collapse in the subhalo central density for 10 Gyr. We develop a semi-analytic model of SIDM subhaloes in a time-evolving density core of the host with tidal stripping and self-scattering ram pressure effects. Our semi-analytic approach provides a simple, efficient and physically-intuitive prediction of SIDM subhaloes, but further improvements are needed to account for baryonic effects in the host and the gravothermal instability accelerated by tidal stripping effects.

arXiv comment19 pages, 12 figures, 1 table. Accepted for publication in MNRAS. Note that results in the previous manuscript (v1) were affected by a bug in our SIDM implementation. We fixed the bug and updated all results accordingly

References in corpus (74)

• A Universal Density Profile from Hierarchical Clustering
• Observational evidence for self-interacting cold dark matter
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• GIZMO: A New Class of Accurate, Mesh-Free Hydrodynamic Simulation Methods
• Dark Matter Self-interactions and Small Scale Structure
• Direct constraints on the dark matter self-interaction cross-section from the merging galaxy cluster 1E0657-56
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• Extragalactic Science, Cosmology and Galactic Archaeology with the Subaru Prime Focus Spectrograph (PFS)
• 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
• Galaxies in N-body simulations: overcoming the overmerging problem
• The unexpected diversity of dwarf galaxy rotation curves
• Smoothed Particle Hydrodynamics in Astrophysics
• A universal model for halo concentrations
• Not so lumpy after all: modeling the depletion of dark matter subhalos by Milky Way-like galaxies
• Milky Way Satellite Census. III. Constraints on Dark Matter Properties from Observations of Milky Way Satellite Galaxies
• Properties of spherical galaxies and clusters with an NFW density profile
• Core Formation in Dwarf Halos with Self Interacting Dark Matter: No Fine-Tuning Necessary
• Disruption of Dark Matter Substructure: Fact or Fiction?
• Constraining Dark Matter-Baryon Scattering with Linear Cosmology
• Dark Matter Substructure in Numerical Simulations: A Tale of Discreteness Noise, Runaway Instabilities, and Artificial Disruption
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• General Constraints on Dark Matter Decay from the Cosmic Microwave Background
• The impact of dark matter cusps and cores on the satellite galaxy population around spiral galaxies
• What does the Bullet Cluster tell us about self-interacting dark matter?
• Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter
• Self-Interacting Dark Matter Halos and the Gravothermal Catastrophe
• Substructure depletion in the Milky Way halo by the disk
• Lyman-alpha Forests cool Warm Dark Matter
• Probing sub-GeV Dark Matter-Baryon Scattering with Cosmological Observables
• Dynamical friction in constant density cores: a failure of the Chandrasekhar formula
• Tying Dark Matter to Baryons with Self-interactions
• Gravothermal collapse of isolated self-interacting dark matter haloes: N-body simulation versus the fluid model
• Spreading out and staying sharp - Creating diverse rotation curves via baryonic and self-interaction effects
• Supermassive Black Holes from Ultra-Strongly Self-Interacting Dark Matter
• Constraining Dissipative Dark Matter Self-Interactions
• 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
• Baryonic clues to the puzzling diversity of dwarf galaxy rotation curves
• Adiabatic Invariants in Stellar Dynamics: II. Gravitational shocking
• Diversity of dark matter density profiles in the Galactic dwarf spheroidal satellites
• Self-Interacting Dark Matter Subhalos in the Milky Way's Tides
• Constraints on decaying dark matter from the extragalactic gamma-ray background
• The Cosmogrid Simulation: Statistical Properties of Small Dark Matter Halos
• Adiabatic Invariants in Stellar Dynamics: I. Basic concepts
• Orbital parameters of infalling satellite haloes in the hierarchical $\Lambda$CDM model
• SatGen: a semi-analytical satellite galaxy generator -- I. The model and its application to Local-Group satellite statistics
• Dark Matter Cores and Cusps in Spiral Galaxies and their Explanations
• The impact of baryonic discs on the shapes and profiles of self-interacting dark matter halos
• The tidal evolution of dark matter substructure -- II. The impact of artificial disruption on subhalo mass functions and radial profiles
• Dwarf Galaxies in CDM, WDM, and SIDM: Disentangling Baryons and Dark Matter Physics
• The diverse dark matter density at sub-kiloparsec scales in Milky Way satellites:implications for the nature of dark matter
• 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
• The tidal evolution of dark matter substructure -- I. Subhalo density profiles
• The effect of a disc on the population of cuspy and cored dark matter substructures in Milky Way-like galaxies
• The Milky Way's Halo and Subhalos in Self-Interacting Dark Matter
• EDGE: Two routes to dark matter core formation in ultra-faint dwarfs
• DASH: a library of dynamical subhalo evolution
• The central densities of Milky Way-mass galaxies in cold and self-interacting dark matter models
• A Practical and Consistent Parametrization of Dark Matter Self-Interactions
• Effective description of dark matter self-interactions in small dark matter haloes
• MAGI: many-component galaxy initialiser
• Revisiting CMB constraints on dark matter annihilation
• Probing Dark Matter Self-interaction with Ultra-faint Dwarf Galaxies
• SatGen -- II. Assessing the impact of a disc potential on subhalo populations
• Cosmological constraints on dark matter annihilation and decay: Cross-correlation analysis of the extragalactic $\gamma$-ray background and cosmic shear
• Effects of electrically charged dark matter on cosmic microwave background anisotropies
• The fate of cannibalized fundamental-plane ellipticals
• Constraining Self-Interacting Dark Matter with Dwarf Spheroidal Galaxies and High-resolution Cosmological $N$-body Simulations
• Local Group star formation in warm and self-interacting dark matter cosmologies

Cited by in corpus (5)

• Strong Dark Matter Self-interactions Diversify Halo Populations within and surrounding the Milky Way
• A Parametric Model for Self-Interacting Dark Matter Halos
• Testing the parametric model for self-interacting dark matter using matched halos in cosmological simulations
• SASHIMI-SIDM: Semi-analytical subhalo modelling for self-interacting dark matter at sub-galactic scales
• Constraining the Nature of Dark Matter from Tidal Radii of Cluster Galaxy Subhalos