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The surprising accuracy of isothermal Jeans modelling of self-interacting dark matter density profiles
Andrew Robertson, Richard Massey, Vincent Eke +2
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 clu…
Understanding the large inferred Einstein radii of observed low-mass galaxy clusters
Andrew Robertson, Richard Massey, Vincent Eke
We assess a claim that observed galaxy clusters with mass ~10^14 Msun are more centrally concentrated than predicted in LCDM. We generate mock strong gravitational lensing observat…
What does strong gravitational lensing? The mass and redshift distribution of high-magnification lenses
Andrew Robertson, Graham P. Smith, Richard Massey +4
Many distant objects can only be detected, or become more scientifically valuable, if they have been highly magnified by strong gravitational lensing. We use EAGLE and BAHAMAS, two…
Observable tests of self-interacting dark matter in galaxy clusters: cosmological simulations with SIDM and baryons
Andrew Robertson, David Harvey, Richard Massey +5
We present BAHAMAS-SIDM, the first large-volume, (400/h Mpc)^3, cosmological simulations including both self-interacting dark matter (SIDM) and baryonic physics. These simulations…
The diverse density profiles of galaxy clusters with self-interacting dark matter plus baryons
Andrew Robertson, Richard Massey, Vincent Eke +10
We present the first simulated galaxy clusters (M_200 > 10^14 Msun) with both self-interacting dark matter (SIDM) and baryonic physics. They exhibit a greater diversity in both dar…
Cosmic particle colliders: simulations of self-interacting dark matter with anisotropic scattering
Andrew Robertson, Richard Massey, Vincent Eke
We investigate how self-interacting dark matter (SIDM) with anisotropic scattering affects the evolution of isolated dark matter haloes as well as systems with two colliding haloes…