Geodesics in a rotating black hole spacetime surrounded by quintessence

The quintessence is one of the several candidates which represents the dark energy responsible for the acceleration of the universe. The quintessence is described by a canonical scalar field minimally coupled to gravity. We study the timelike geodesic congruences in the background of a rotating black hole spacetime surrounded by quintessence in equatorial plane. The effect of equation of state (EOS) parameter for quintessence and the normalization factor on geodesics is investigated in detail in view of the structure of possible orbits, including the innermost stable circular orbits (ISCOs). The structure of photon orbits is also studied for the different values of parameters involved in. The results obtained are also then compared with those of the Kerr black hole spacetime and Schwarzschild black hole spacetime in GR with or without quintessence