Extracting Energy from Accretion into a Kerr Black Hole | Zendy

LiXin Li | Zendy; B. Paczyński | Zendy

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Extracting Energy from Accretion into a Kerr Black Hole

Author(s) -

LiXin Li,

B. Paczyński

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312678

Subject(s) - physics , black hole (networking) , accretion (finance) , spin flip , astrophysics , accretion disc , rotating black hole , rest (music) , stellar black hole , intermediate mass black hole , astronomy , computer network , routing protocol , routing (electronic design automation) , galaxy , computer science , link state routing protocol , acoustics

The highest efficiency of converting rest mass into energy by accreting matter into a Kerr black hole is approximately 31% (Thorne 1974). We propose a new process in which periods of accretion from a thin disk, and the associated spin-up of the black hole, alternate with the periods of no accretion and magnetic transfer of energy from the black hole to the disk. These cycles can repeat indefinitely, at least in principle, with the black hole mass increasing by approximately 66% per cycle and up to approximately 43% of accreted rest mass radiated away by the disk.

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