2021/09/13 by Masaaki Takahashi, Motoki Kino, Hung-Yi Pu
Physics and Astronomy · #Acceleration #Active galactic nucleus #Angular momentum #Astrophysical Phenomena and Observations #Astrophysical jet #Astrophysics #Astrophysics and Cosmic Phenomena #Classical mechanics #Computational physics #Jet (fluid) #Magnetic field #Magnetohydrodynamics #Magnetosphere #Mechanics #Nuclear physics #Outflow #Physics #Plasma #Pulsars and Gravitational Waves Research #Quantum electrodynamics #astro-ph.GA #astro-ph.HE #gr-qc
paper · pdf · doi:10.1103/physrevd.104.103004
16 pages, 7 figures
arxiv created 2021/09/13 · openalex publication_date 2021/11/05 · arxiv updated 2021/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
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, Alfv'en 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.