論文

査読有り
2012年5月

Effect of a weak electromagnetic field on particle acceleration by a rotating black hole

PHYSICAL REVIEW D
  • Takahisa Igata
  • ,
  • Tomohiro Harada
  • ,
  • Masashi Kimura

85
10
開始ページ
104028
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.85.104028
出版者・発行元
AMER PHYSICAL SOC

We study high energy charged particle collisions near the horizon in an electromagnetic field around a rotating black hole and reveal the condition of the fine-tuning to obtain arbitrarily large center-of-mass (CM) energy. We demonstrate that the CM energy can be arbitrarily large as the uniformly magnetized rotating black hole arbitrarily approaches maximal rotation under the situation that a charged particle plunges from the innermost stable circular orbit (ISCO) and collides with another particle near the horizon. Recently, Frolov [Phys. Rev. D 85, 024020 (2012)] proposed that the CM energy can be arbitrarily high if the magnetic field is arbitrarily strong, when a particle collides with a charged particle orbiting the ISCO with finite energy near the horizon of a uniformly magnetized Schwarzschild black hole. We show that the charged particle orbiting the ISCO around a spinning black hole needs arbitrarily high energy in the strong field limit. This suggests that Frolov's process is unstable against the black hole spin. Nevertheless, we see that magnetic fields may substantially promote the capability of rotating black holes as particle accelerators in astrophysical situations.


リンク情報
DOI
https://doi.org/10.1103/PhysRevD.85.104028
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000304175000003&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevD.85.104028
  • ISSN : 1550-7998
  • Web of Science ID : WOS:000304175000003

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