On the dynamics of perfect fluids in non-minimally coupled gravity
  In this work we explore the consequences that a non-minimal coupling between
geometry and matter can have on the dynamics of perfect fluids. It is argued
that the presence of a static, axially symmetric pressureless fluid does not
imply a Minkowski space-time like as is in General Relativity. This feature can
be atributed to a pressure mimicking mechanism related to the non-minimal
coupling. The case of a spherically symmetric black hole surrounded by fluid
matter is analyzed, and it is shown that under equilibrium conditions the total
fluid mass is about twice that of the black hole. Finally, a generalization of
the Newtonian potential for a fluid element is proposed and its implications
are briefly discussed.
