The role of Dark Matter interaction in galaxy clusters
  We consider a toy model to analyze the consequences of dark matter interaction with a dark energy background on the overall rotation of galaxy clusters and the misalignment between their dark matter and baryon distributions when compared to {\Lambda}CDM predictions. The interaction parameters are found via a genetic algorithm search. The results obtained suggest that interaction is a basic phenomenon whose effects are detectable even in simple models of galactic dynamics. 
C. E. Pellicer, Elisa G. M. Ferreira, Daniel C. Guariento, Andr\'e A.   Costa, Leila L. Graef, Andrea Coelho, Elcio Abdalla
astro-ph.CO gr-qc