5 papers
Collisionless Shock Driven by a Supersonic Velocity Shear
Kazuki Kamiido, Yutaka Ohira
The long-term evolution of a relativistic collisionless velocity shear in an unmagnetized electron-positron plasma is investigated using a first-principle particle-in-cell simulati…
Collisionless shocks having relativistic velocities in relativistically hot plasmas
Kamiido Kazuki, Ohira Yutaka
Shocks in relativistically hot plasmas are thought to exist in various high-energy astrophysical phenomena, but it is not clear how relativistic collisionless shocks are formed, wh…
Very-high-energy gamma rays from cosmic rays escaping from Galactic black hole binaries
Yutaka Ohira
We solve the cosmic-ray diffusion around a Galactic black hole binary (microquasars) by considering the finite size of the escape region and the continuous cosmic-ray injection. We…
Property of downstream turbulence driven by the special relativistic shock-clump interaction
Kanji Morikawa, Yutaka Ohira, Takumi Ohmura
Three-dimensional special relativistic magnetohydrodynamic simulations are performed to investigate properties of the downstream turbulence generated by the interaction between a r…
Collisionless shock in a relativistically hot unmagnetized electron-positron plasma
Kamiido Kazuki, Ohira Yutaka
In this work, we investigate collisionless shocks propagating in a relativistically hot unmagnetized electron-positron plasmas. We estimate the dissipation fraction at shocks in th…