Testing the interaction of dark energy to dark matter through the   analysis of virial relaxation of clusters Abell Clusters A586 and A1689 using   realistic density profiles
  Interaction between dark energy and dark matter is probed through deviation from the virial equilibrium for two relaxed clusters: A586 and A1689. The evaluation of the virial equilibrium is performed using realistic density profiles. The virial ratios found for the more realistic density profiles are consistent with the absence of interaction. 
Orfeu Bertolami, Francisco Gil Pedro, Morgan Le Delliou (IFT)
astro-ph.CO gr-qc hep-th