TY - JOUR

T1 - Maximal efficiency of the collisional Penrose process with a spinning particle. II. Collision with a particle on the innermost stable circular orbit

AU - Okabayashi, Kazumasa

AU - Maeda, Kei Ichi

N1 - Funding Information:
We would like to thank Hirotada Okawa, Shingo Suzuki, and Keigo Shimada for useful information and comments. This work was supported in part by Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Numbers JP17H06359 (KM) and JP19K03857 (KM).

PY - 2020/1/8

Y1 - 2020/1/8

N2 - We analyze the collisional Penrose process between a particle on the innermost stable circular orbit (ISCO) orbit around an extreme Kerr black hole and a particle impinging from infinity. We consider both cases with non-spinning and spinning particles. We evaluate the maximal efficiency, ηmax=(extracted energy)/(input energy), for the elastic collision of two massive particles and for the photoemission process, in which the ISCO particle will escape to infinity after a collision with a massless impinging particle. For non-spinning particles, the maximum efficiency is ηmax\approx 2.562 for the elastic collision and ηmax\approx 7 for the photoemission process. For spinning particles we obtain the maximal efficiency ηmax\approx 8.442 for the elastic collision and ηmax\approx 12.54 for the photoemission process.

AB - We analyze the collisional Penrose process between a particle on the innermost stable circular orbit (ISCO) orbit around an extreme Kerr black hole and a particle impinging from infinity. We consider both cases with non-spinning and spinning particles. We evaluate the maximal efficiency, ηmax=(extracted energy)/(input energy), for the elastic collision of two massive particles and for the photoemission process, in which the ISCO particle will escape to infinity after a collision with a massless impinging particle. For non-spinning particles, the maximum efficiency is ηmax\approx 2.562 for the elastic collision and ηmax\approx 7 for the photoemission process. For spinning particles we obtain the maximal efficiency ηmax\approx 8.442 for the elastic collision and ηmax\approx 12.54 for the photoemission process.

KW - E00

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U2 - 10.1093/ptep/ptz143

DO - 10.1093/ptep/ptz143

M3 - Article

AN - SCOPUS:85082557321

VL - 2020

JO - Progress of Theoretical and Experimental Physics

JF - Progress of Theoretical and Experimental Physics

SN - 2050-3911

IS - 1

M1 - 013E01

ER -