A semi-analytic study of self-interacting dark-matter haloes with baryons

Abstract

We combine the isothermal Jeans model and the model of adiabatic halo contraction into a simple semi-analytic procedure for computing the density profile of self-interacting dark-matter (SIDM) haloes with the gravitational influence from the inhabitant galaxies. We show that the model agrees well with cosmological SIDM simulations over the entire core-forming stage and up to the onset of gravothermal core-collapse. Using this model, we show that the halo response to baryons is more diverse in SIDM than in CDM and depends sensitively on galaxy size, a desirable link in the context of the structural diversity of bright dwarf galaxies. The fast speed of the method facilitates analyses that would be challenging for numerical simulations -- notably, 1) we quantify the SIDM halo response as functions of the baryonic properties, on a fine mesh grid spanned by the baryon-to-total-mass ratio, $M_{\mathrm{b}}/M_{\mathrm{vir}}$, and galaxy compactness, $r_{1/2}/R_{\mathrm{vir}}$; 2) we show with high statistical precision that for typical Milky-Way-like systems, the SIDM profiles are similar to their CDM counterparts; and 3) we delineate the regime of gravothermal core-collapse in the $M_{\mathrm{b}}/M_{\mathrm{vir}}$-$r_{1/2}/R_{\mathrm{vir}}$ space, for a given cross section and a given halo concentration. Finally, we compare the isothermal Jeans model with the more sophisticated gravothermal fluid model, and show that the former yields faster core formation and agrees better with cosmological simulations. We attribute the difference to whether the target CDM halo is used as a boundary condition or as the initial condition for the gravothermal evolution, and thus comment on possible future improvements of the fluid model. We have made our programs for the model publicly available at https://github.com/JiangFangzhou/SIDM.

arXiv comment15 pages, 9 figures, submitted to MNRAS

References in corpus (51)

• A Universal Density Profile from Hierarchical Clustering
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• E pur si muove: Galiliean-invariant cosmological hydrodynamical simulations on a moving mesh
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• Cold dark matter haloes in the Planck era: evolution of structural parameters for Einasto and NFW profiles
• Response of dark matter halos to condensation of baryons: cosmological simulations and improved adiabatic contraction model
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• SPARC: Mass Models for 175 Disk Galaxies with Spitzer Photometry and Accurate Rotation Curves
• 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
• The Arepo public code release
• High-resolution mass models of dwarf galaxies from LITTLE THINGS
• Galacticus: A Semi-Analytic Model of Galaxy Formation
• Core Formation in Dwarf Halos with Self Interacting Dark Matter: No Fine-Tuning Necessary
• Dark matter cores all the way down
• 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
• Mass Accretion Rates and Histories of Dark Matter Haloes
• The Mass Profile and Accretion History of Cold Dark Matter Halos
• 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
• Formation of ultra-diffuse galaxies in the field and in galaxy groups
• The Relationship between Galaxy and Dark Matter Halo Size from z~3 to the present
• A Quantitative Study of Interacting Dark Matter in Halos
• Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons
• Constraining Dissipative Dark Matter Self-Interactions
• Structure and Subhalo Population of Halos in a Self-Interacting Dark Matter Cosmology
• 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
• Velocity-dependent Self-interacting Dark Matter from Groups and Clusters of Galaxies
• A Testable Conspiracy: Simulating Baryonic Effects on Self-Interacting Dark Matter Halos
• Gravothermal Collapse of Self-Interacting Dark Matter Halos and the Origin of Massive Black Holes
• No cores in dark matter-dominated dwarf galaxies with bursty star formation histories
• 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
• Core-collapse, evaporation and tidal effects: the life story of a self-interacting dark matter subhalo
• The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles
• Signatures of Velocity-Dependent Dark Matter Self-Interactions in Milky Way-mass Halos
• The Dekel-Zhao profile: A mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
• The central densities of Milky Way-mass galaxies in cold and self-interacting dark matter models
• Dissipative Dark Matter on FIRE: I. Structural and kinematic properties of dwarf galaxies
• Isolated compact elliptical galaxies: Stellar systems that ran away
• The Dark Matter Distributions in Low-Mass Disk Galaxies. II. The Inner Density Profiles
• A cuspy dark matter halo
• A Critical Assessment of Solutions to the Galaxy Diversity Problem
• Self-Interacting Dark Matter and the Delay of Super-Massive Black Hole Growth
• Orbital Evolution of Satellite Galaxies in Self-Interacting Dark Matter Models

Cited by in corpus (24)

• A Self-interacting Dark Matter Solution to the Extreme Diversity of Low-mass Halo Properties
• Strong Dark Matter Self-interactions Diversify Halo Populations within and surrounding the Milky Way
• Constraining resonant dark matter self-interactions with strong gravitational lenses
• The impact of baryonic potentials on the gravothermal evolution of self-interacting dark matter haloes
• A Parametric Model for Self-Interacting Dark Matter Halos
• Exploring the nature of dark matter with the extreme galaxy AGC 114905
• Numerical Challenges in Modeling Gravothermal Collapse in Self-Interacting Dark Matter Halos
• Gravothermal collapse and the diversity of galactic rotation curves
• Testing the parametric model for self-interacting dark matter using matched halos in cosmological simulations
• Exploring Self-Interacting Dark Matter Halos with Diverse Baryonic Distributions: A Parametric Approach
• Relaxing Constraints on Dark Matter Annihilation Near the Supermassive Black Hole in M87
• Unexpected clustering pattern in dwarf galaxies challenges formation models
• A Universal Analytic Model for Gravitational Lensing by Self-Interacting Dark Matter Halos
• The "Little Dark Dot": Evidence for Self-interacting Dark Matter in the Strong Lens SDSS J0946+1006?
• A dense dark matter core of the subhalo in the strong lensing system JVAS B1938+666
• Core collapse in resonant self-interacting dark matter across two decades in halo mass
• Semi-Analytic Modeling of Dark Matter Subhalo Encounters with Thin Stellar Streams: Statistical Predictions for GD-1-like Streams in CDM
• Self-Interacting Dark-Matter Spikes and the Final-Parsec Problem: Bayesian constraints from the NANOGrav 15-Year Gravitational-Wave Background
• The Influence of Subhaloes on Host Halo Properties
• The density profile of Milky Way dark matter halo constrained from the OGLE microlensing sky map
• An Enhanced Isothermal Jeans Approach to Constraining Dark Matter Self-Interactions from Galactic Kinematics
• Merging Galaxy Clusters and the Search for New Physics of Dark Matter: A Review
• Accretion of self-interacting dark matter onto supermassive black holes
• Imprints of tidal interactions on the stellar distribution of satellite galaxies: implications for dark matter deficient galaxies