Null trajectories and bending of light in charged black holes with   quintessence
  We have studied null geodesics of the charged black hole surrounded by quintessence. Quintessence is a candidate for dark energy and is represented by a scalar field. Here, we have done a detailed study of the photon trajectories. The exact solutions for the trajectories are obtained in terms of the Jacobi-elliptic integrals for all possible energy and angular momentum of the photons. We have also studied the bending angle using the Rindler and Ishak method. 
Sharmanthie Fernando, Scott Meadows, and Kevon Reis
gr-qc