Particle acceleration of two general particles in the background of rotating AyónBeatoGarcía black holes
Abstract
The rotating AyónBeatoGarcía (ABG) black holes, apart from mass (M) and rotation parameter (a), has an additional charge Q and encompassed the Kerr black hole as particular case when Q=0. We demonstrate the ergoregions of rotating ABG black holes depend on both rotation parameter a and charge Q, and the area of the ergoregions increases with increase in the values of Q. Bañados, Silk and West (BSW) demonstrated that an extremal Kerr black hole can act as a particle accelerator with arbitrarily high centerofmass energy (E_{CM}). We study the collision of two general particles with different masses falling freely from rest in the equatorial plane of a rotating ABG black hole near the event horizon and find that the E_{CM} of two colliding particles is arbitrarily high when one of the particles takes a critical value of angular momentum in the extremal case, whereas for nonextremal case E_{CM} for a pair of colliding particles is generically divergent at the inner horizon, and explicitly studying the effect of charge Q on the E_{CM} for ABG black hole. In particular, our results in the limit Q→ 0 reduce exactly to visàvis those of the Kerr black hole.
 Publication:

Astrophysics and Space Science
 Pub Date:
 January 2019
 DOI:
 10.1007/s105090193498z
 arXiv:
 arXiv:1805.00804
 Bibcode:
 2019Ap&SS.364...10A
 Keywords:

 Black hole;
 Particle accelerator;
 Regular black hole;
 General Relativity and Quantum Cosmology
 EPrint:
 17 pages, 6 figures