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 η̃ 21 %.
Authors:
Oteev, Tursinbay; Abdujabbarov, Ahmadjon; Stuchlík, Zdeněk; Ahmedov, Bobomurat;