Visit ASIAA Homepage Registration Deadline: September 1, 2018
Taiwanese Theoretical Astrophysics Workshop
September 25-27, 2018
AS/NTU Astronomy-Mathematics Building

Oral Presentation

Very-high-energy emission from rapidly rotating black hole magetospheres

Author(s): Kouichi Hirotani (ASIAA)

Presenter: Kouichi Hirotani (ASIAA/TIARA)

It is widely accepted that the electromagnetic extraction of the rotational energy of black holes is one of the promising mechanisms for powering galactic black hole (BH) binaries and active galactic nuclei (AGNs). The extracted energy is dissipated mostly in a large-scale jet, while a small portion can be dissipated also in a vacuum gap formed in the vicinity of a BH by virtue of the frame-dragging effect. We investigate the electron-positron acceleration and the resulting gamma radiation in such a gap. Solving the stationary pair production cascade from basic equations, we demonstrate that the super-massive BHs in low-luminosity AGNs and stellar-mass BHs in our galaxy can emit the TeV fluxes that will be detected with future ground-based Imaging Atmospheric Cherenkov Telescopes like the Cherenkov Telescope Array (CTA).

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