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    Energy extraction and particle acceleration around a rotating black hole in quintessence

    Zdeněk Stuchlík · Srpen 01, 2016 · Fyzika · 0 comments
    1

    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;

    http://adsabs.harvard.edu/abs/2016Ap%26SS.361..269O

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