106 citations · 366 across the 13 of their papers we have counts for
13 papers
Intrinsic Spectral Curvature from Finite-Cycle Transport at Relativistic Shocks
Ji-Hoon Ha
Power-law spectra are a central prediction of shock acceleration and are commonly associated with asymptotic scale invariance under diffusive transport. In finite relativistic shoc…
Cosmic Ray Acceleration and Nonthermal Radiation at Accretion Shocks in the Outer Regions of Galaxy Clusters
Ji-Hoon Ha, Dongsu Ryu, Hyesung Kang
Cosmology models predict that external accretion shocks form in the outer region of galaxy clusters due to supersonic gas infall from filaments and voids in the cosmic web. They ar…
Electron Preacceleration at Weak Quasi-perpendicular Intracluster Shocks: Effects of Preexisting Nonthermal Electrons
Ji-Hoon Ha, Dongsu Ryu, Hyesung Kang +1
Radio relics in the outskirts of galaxy clusters imply the diffusive shock acceleration (DSA) of electrons at merger-driven shocks with Mach number in the intrac…
Microinstabilities in the Transition Region of Weak Quasi-Perpendicular Intracluster Shocks
Sunjung Kim, Ji-Hoon Ha, Dongsu Ryu +1
Microinstabilities play important roles in both entropy generation and particle acceleration in collisionless shocks. Recent studies have suggested that in the transition zone of q…
Effects of Multi-scale Plasma Waves on Electron Preacceleration at Weak Quasi-perpendicular Intracluster Shocks
Ji-Hoon Ha, Sunjung Kim, Dongsu Ryu +1
Radio relics associated with merging galaxy clusters indicate the acceleration of relativistic electrons in merger-driven shocks with low sonic Mach numbers ()…
Modeling of Cosmic-Ray Production and Transport and Estimation of Gamma-Ray and Neutrino Emissions in Starburst Galaxies
Ji-Hoon Ha, Dongsu Ryu, Hyesung Kang
Starburst galaxies (SBGs) with copious massive stars and supernova (SN) explosions are the sites of active cosmic-ray production. Based on the predictions of nonlinear diffusive sh…