The effects of self-interacting dark matter on the stripping of galaxies that fall into clusters

Abstract

We use the Cluster-EAGLE (C-EAGLE) hydrodynamical simulations to investigate the effects of self-interacting dark matter (SIDM) on galaxies as they fall into clusters. We find that SIDM galaxies follow similar orbits to their Cold Dark Matter (CDM) counterparts, but end up with $\sim$25 per cent less mass by the present day. One in three SIDM galaxies are entirely disrupted, compared to one in five CDM galaxies. However, the excess stripping will be harder to observe than suggested by previous DM-only simulations because the most stripped galaxies form cores and also lose stars: the most discriminating objects become unobservable. The best test will be to measure the stellar-to-halo mass relation (SHMR) for galaxies with stellar mass $10^{10-11}{\mathrm{M}}_{\odot }$. This is 8 times higher in a cluster than in the field for a CDM universe, but 13 times higher for an SIDM universe. Given intrinsic scatter in the SHMR, these models could be distinguished with noise-free galaxy-galaxy strong lensing of $\sim 32$ cluster galaxies.

References in corpus (42)

• emcee: The MCMC Hammer
• Planck 2015 results. XIII. Cosmological parameters
• Planck 2013 results. XVI. Cosmological parameters
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• Populating a cluster of galaxies - I. Results at z=0
• A direct empirical proof of the existence of dark matter
• Observational evidence for self-interacting cold dark matter
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• Galactic star formation and accretion histories from matching galaxies to dark matter haloes
• Substructures in hydrodynamical cluster simulations
• LSST Science Book, Version 2.0
• Euclid Definition Study Report
• Cosmological Simulations with Self-Interacting Dark Matter I: Constant Density Cores and Substructure
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• Cosmological Simulations with Self-Interacting Dark Matter II: Halo Shapes vs. Observations
• The Importance of Satellite Quenching for the Build-Up of the Red Sequence of Present Day Galaxies
• Dark matter and cosmic structure
• Ram pressure stripping the hot gaseous halos of galaxies in groups and clusters
• The dark matter of gravitational lensing
• Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222
• The Atacama Cosmology Telescope: A Catalog of > 4000 Sunyaev-Zel'dovich Galaxy Clusters
• The Cluster-EAGLE project: global properties of simulated clusters with resolved galaxies
• What does the Bullet Cluster tell us about self-interacting dark matter?
• The Hydrangea simulations: galaxy formation in and around massive clusters
• Weak Lensing Measurement of the Mass--Richness Relation of SDSS redMaPPer Clusters
• N-body Dark Matter Haloes with simple Hierarchical Histories
• The structure and evolution of weakly self-interacting cold dark matter halos
• Discovery of a Dissociative Galaxy Cluster Merger with Large Physical Separation
• Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons
• Giant cluster arcs as a constraint on the scattering cross-section of dark matter
• The diverse density profiles of galaxy clusters with self-interacting dark matter plus baryons
• Cosmic particle colliders: simulations of self-interacting dark matter with anisotropic scattering
• The mass-richness relation of optically-selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year data
• The Mismeasure of Mergers: Revised Limits on Self-interacting Dark Matter in Merging Galaxy Clusters
• Enhanced tidal stripping of satellites in the galactic halo from dark matter self-interactions
• A homogeneous measurement of the delay between the onsets of gas stripping and star formation quenching in satellite galaxies of groups and clusters
• A rumble in the dark: signatures of self-interacting dark matter in Super-Massive Black Hole dynamics and galaxy density profiles
• Dark matter stripping in galaxy clusters: a look at the Stellar to Halo Mass relation in the Illustris simulation
• The Signatures of Self-Interacting Dark Matter and Subhalo Disruption on Cluster Substructure
• Constraining the cross-section of dark matter with giant radial arcs in galaxy clusters
• Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope