https://doi.org/10.1140/epjc/s10052-023-12171-w
Regular Article - Theoretical Physics
Collisional Penrose process of extended test particles near an extremal Kerr black hole
1
Department of Physics, Southern University of Science and Technology, 518055, Shenzhen, China
2
College of Education for the Future, Beijing Normal University, 519087, Zhuhai, China
3
Department of Physics, Jiangxi Normal University, 330022, Nanchang, China
Received:
23
July
2023
Accepted:
20
October
2023
Published online:
30
October
2023
We investigate the collisional Penrose process of extended test particles near an extremal Kerr black hole using the pole-dipole-quadrupole approximation. We analyze the motion of the test particles and examine the dynamics and maximal efficiency of energy extraction in this process. Our results demonstrate that the maximal extracted energy in the collisional Penrose process is influenced by the spin s and quadrupolar parameter C of the test particles. Specifically, we observe that, at a fixed collisional position, the energy extraction efficiency decreases as the spin increases for either the pole-dipole or the pole-dipole-quadrupole approximation case. Furthermore, for a fixed spin, the energy extraction efficiency is higher in the pole-dipole-quadrupole approximation compared to the pole-dipole approximation. These findings provide insight into the role of the internal structures of the test particles in the collisional Penrose process.
© The Author(s) 2023
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