Publication date: Aug 2016
Abstract:
We study motion and collision of particles in the gravitational field of
rotating black hole immersed in quintessential dark energy characterized
with the quintessential parameter ωqin(-1;-1/3)
governing the equation of state of the dark energy, and the
dimensionless quintessential field parameter tilde{c}. We focus on the
acceleration of particles due to collisional processes and show how the
center of mass energy depends on the quintessential field parameter
tilde{c}. We also make comparison of the obtained results to the
collisional energetics of quintessential static black holes
demonstrating the crucial role of the rotation parameter a in the
particle acceleration. Finally we study the dependence of the maximal
value of the efficiency of energy extraction through Penrose process for
rotating black hole with quintessential field parameter tilde{c}. It is
found that quintessence field decreases the energy extraction efficiency
through Penrose process and when the parameter tilde{c} vanishes one can
get the standard value of the efficiency coefficient for the Kerr black
hole as η˜ 21 %.
Authors:
Oteev, Tursinbay; Abdujabbarov, Ahmadjon; Stuchlík, Zdeněk; Ahmedov, Bobomurat;