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

Kazumasa Okabayashi, Kei Ichi Maeda

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number013E01
JournalProgress of Theoretical and Experimental Physics
Volume2020
Issue number1
DOIs
Publication statusPublished - 2020 Jan 8

Keywords

  • E00

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Maximal efficiency of the collisional Penrose process with a spinning particle. II. Collision with a particle on the innermost stable circular orbit'. Together they form a unique fingerprint.

Cite this