Probing Self-interacting Dark Matter with Disk Galaxies in Cluster
  Environments
  Self-Interacting Dark Matter (SIDM) has long been proposed as a solution to
small scale problems posed by standard Cold Dark Matter (CDM). We use numerical
simulations to study the effect of dark matter interactions on the morphology
of disk galaxies falling into galaxy clusters. The effective drag force on dark
matter leads to offsets of the stellar disk with respect to the surrounding
halo, causing distortions in the disk. For anisotropic scattering
cross-sections of 0.5 and 1.0$\,\textrm{cm}^{2}\textrm{g}^{-1}$, we show that
potentially observable warps, asymmetries, and thickening of the disk occur in
simulations. We discuss observational tests of SIDM with galaxy surveys and
more realistic simulations needed to obtain detailed predictions.
