Mimicking dark matter in galaxy clusters through a non-minimal
  gravitational coupling with matter
  In this work, one shows that a specific non-minimal coupling between the
scalar curvature and matter can mimic the dark matter component of galaxy
clusters. For this purpose, one assesses the Abell cluster A586, a massive
nearby relaxed cluster of galaxies in virial equilibrium, where direct mass
estimates and strong-lensing determinations are possible. One then extends the
dark matter mimicking to a large sample of galaxy clusters whose density
profiles are obtained from the Chandra high quality data, also in virial
equilibrium. The total density, which generally follows a cusped profile and
reveals a very small baryonic component, can be effectively described within
this framework.
