Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons

@article{Robertson2019ObservableTO,
  title={Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons},
  author={Andrew Robertson and David R. Harvey and Richard J. Massey and Vincent R. Eke and Ian G. McCarthy and Mathilde Jauzac and Baojiu Li and Joop Schaye},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019}
}
We present bahamas-SIDM, the first large-volume, $(400 \, h^{-1} \mathrm{\, Mpc})^{3}$, cosmological simulations including both self-interacting dark matter (SIDM) and baryonic physics. These simulations are important for two primary reasons: (1) they include the effects of baryons on the dark matter distribution and (2) the baryon particles can be used to make mock observables that can be compared directly with observations. As is well known, SIDM haloes are systematically less dense in… 

Figures from this paper

The interplay of self-interacting dark matter and baryons in shaping the halo evolution
We use high-resolution hydrodynamical simulation to test the difference of halo properties in cold dark matter (CDM) and a self-interacting dark matter (SIDM) scenario with a constant cross-section
The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles
Recent claims of observational evidence for self-interacting dark matter (SIDM) have relied on a semi-analytic method for predicting the density profiles of galaxies and galaxy clusters containing
Strong lensing signatures of self-interacting dark matter in low-mass haloes
Core formation and runaway core collapse in models with self-interacting dark matter (SIDM) significantly alter the central density profiles of collapsed haloes. Using a forward modelling inference
The central densities of Milky Way-mass galaxies in cold and self-interacting dark matter models
We present a suite of baryonic cosmological zoom-in simulations of self-interacting dark matter (SIDM) haloes within the “Feedback In Realistic Environment” (FIRE) project. The three simulated haloes
Constraining velocity-dependent self-interacting dark matter with the Milky Way’s dwarf spheroidal galaxies
The observed anti-correlation between the central dark matter (DM) densities of the bright Milky Way (MW) dwarf spheroidal galaxies (dSphs) and their orbital pericenter distances poses a potential
From dwarf galaxies to galaxy clusters: Self-Interacting Dark Matter over 7 orders of magnitude in halo mass
In this paper we study the density profiles of self-interacting dark matter (SIDM) haloes spanning the full observable mass range, from dwarf galaxies to galaxy clusters. Using realistic simulations
Diversity in density profiles of self-interacting dark matter satellite halos
We present results from N-body simulations of self-interacting dark matter (SIDM) subhalos, which could host ultra-faint dwarf spheroidal galaxies, inside a Milky-Way-like main halo. We find that
Constraining Dark Matter-Dark Radiation interactions with CMB, BAO, and Lyman-α
Several interesting Dark Matter (DM) models invoke a dark sector leading to two types of relic particles, possibly interacting with each other: non-relativistic DM, and relativistic Dark Radiation
The nature of core formation in dark matter haloes: adiabatic or impulsive?
It is well established that the central deficit of dark matter (DM) observed in many dwarf galaxies disagrees with the cuspy DM haloes predicted in the collision-less and cold DM (CDM) model.
Constraining the cross-section of dark matter with giant radial arcs in galaxy clusters
We compare the statistics and morphology of giant arcs in galaxy clusters using N-body simulations within the standard cold dark matter model and simulations where dark matter has a non-negligible
...
...

References

SHOWING 1-10 OF 103 REFERENCES
The interplay of self-interacting dark matter and baryons in shaping the halo evolution
We use high-resolution hydrodynamical simulation to test the difference of halo properties in cold dark matter (CDM) and a self-interacting dark matter (SIDM) scenario with a constant cross-section
Observable tests of self-interacting dark matter in galaxy clusters: BCG wobbles in a constant density core
Models of cold dark matter (CDM) predict that the distribution of dark matter in galaxy clusters should be cuspy, centrally concentrated. Constant density cores would be strong evidence for beyond
Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
We use cosmological simulations to study the effects of self-interacting dark matter (SIDM) on the density profiles and substructure counts of dark matte r halos from the scales of spiral galaxies to
Cosmological simulations with self-interacting dark matter – II. Halo shapes versus observations
If dark matter has a large self-interaction scattering cross section, then interactions among dark-matter particles will drive galaxy and cluster halos to become spherical in their centers. Work in
Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter
We present the first cosmological simulations of dwarf galaxies, which include dark matter self-interactions and baryons. We study two dwarf galaxies within cold dark matter, and four different
A rumble in the dark: signatures of self-interacting dark matter in supermassive black hole dynamics and galaxy density profiles
We explore for the first time the effect of self-interacting dark matter (SIDM) on the dark matter (DM) and baryonic distribution in massive galaxies formed in hydrodynamical cosmological
Dark Matter Halos as Particle Colliders: Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters.
TLDR
The results dramatically improve the constraints on SIDM models and may allow the masses of both DM and dark mediator particles to be measured even if the dark sector is completely hidden from the standard model, which is illustrated for the dark photon model.
A Testable Conspiracy: Simulating Baryonic Effects on Self-Interacting Dark Matter Halos
We investigate the response of self-interacting dark matter (SIDM) halos to the growth of galaxy potentials using idealized simulations, each run in tandem with standard collisionless Cold Dark
Constraints on the Self-Interaction Cross Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657?56
We compare recent results from X-ray, strong lensing, weak lensing, and optical observations with numerical simulations of the merging galaxy cluster 1E 0657–56. X-ray observations reveal a
...
...