Relativistic jet acceleration region in a black hole magnetosphere

Masaaki Takahashi, Motoki Kino, Hung Yi Pu

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We discuss stationary and axisymmetric transmagnetosonic outflows in the magnetosphere of a rotating black hole (BH). Ejected plasma from the plasma source located near the BH is accelerated far away to form a relativistic jet. In this study, the plasma acceleration efficiency and conversion of fluid energy from electromagnetic energy are considered by employing the transfast magnetosonic flow solution derived by Takahashi & Tomimatsu (2008). Considering the parameter dependence of magnetohydrodynamical flows, we search for the parameters of the transmagnetosonic outflow solution to the recent M87 jet observations and obtain the angular velocity values of the magnetic field line and angular momentum of the outflow in the magnetized jet flow. Therefore, we estimate the locations of the outer light surface, Alfvén surface, and separation surface of the flow. We also discuss the electromagnetic energy flux from the rotating BH (i.e., the Blandford-Znajek process), which suggests that the energy extraction mechanism is effective for the M87 relativistic jet.

Original languageEnglish
Article number103004
JournalPhysical Review D
Issue number10
Publication statusPublished - 2021 Nov 15

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Relativistic jet acceleration region in a black hole magnetosphere'. Together they form a unique fingerprint.

Cite this