Cosmophysics Seminar (Dr. K. Toma)

Start2017/06/08(Thu) 3:30 PM
End2017/06/08(Thu) 4:30 PM
VenueKenkyu Honkan 1F, Meeting Room 1
TitleRelativistic Jets Driven by Black Holes
SpeakerDr. Kenji Toma (Frontier Research Institute for Interdisciplinary Sciences, Tohoku University)
ContactT.Terada (


Relativistic Jets are collimated plasma outflows with speeds close to
the light speed from the vicinities of black holes, and observed in
association with some active galaxies and gamma-ray bursts. They could
be the emitters of high-energy cosmic-rays, high-energy neutrinos, and
gravitational waves. In spite of the significant progress in recent
years, there are still many unresolved key issues concerning the
energy injection, mass injection, acceleration, collimation, and
energy dissipation/emission mechanisms of jets. This talk reviews the
current theoretical framework for solving those issues and then
focuses on the energy injection mechanism, in particular the
Blandford-Znajek process, i.e., steady electromagnetic energy
injection by rotating black holes themselves. Physical differences
among this process, pulsar winds, and mechanical Penrose process are