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Fast Radio Bursts from Induced Upscattering. I. Magnetar Polar Fireballs
Rei Nishiura, Kunihito Ioka, Bing Zhang
The extreme brightness temperatures of fast radio bursts (FRBs) demand a coherent process that converts magnetar burst energy into millisecond radio emission. We propose that FRBs…
Mass and Spin Growth of Very Massive Stars in Star Clusters Potentially Associated with Little Red Dots
Ataru Tanikawa, Masaru Shibata, Kunihito Ioka
Using gravitational -body simulations, we investigate the evolution of mass and spin for very massive stars (VMSs) in dense star clusters, which could subsequently evolve into L…
Induced Scattering of Strong Waves in Pair Plasmas
Masanori Iwamoto, Kunihito Ioka
We study induced (stimulated) scattering of linearly polarized, strong electromagnetic waves in pair plasmas, which is crucial for understanding the propagation of fast radio burst…
Induced Scattering of Fast Radio Bursts in Magnetar Magnetospheres
Rei Nishiura, Shoma F. Kamijima, Kunihito Ioka
We investigate induced Compton/Brillouin scattering of electromagnetic waves in magnetized electron and positron pair plasma by verifying kinetic theory with Particle-in-Cell simul…
One-dimensional PIC Simulation of Induced Compton Scattering in Magnetized Electron-Positron Pair Plasma
Shoma F. Kamijima, Rei Nishiura, Masanori Iwamoto +1
We investigate induced Compton scattering of a circularly polarized Alfvén wave propagating in a magnetized electron-positron pair plasma using one-dimensional Particle-in-Cell (PI…
Little Red Dots as Hidden Neutrino Sources
Riku Kuze, Kunihito Ioka, Kohta Murase +2
Little Red Dots (LRDs) are enigmatic, compact, red galaxies at high redshift, -, discovered by the James Webb Space Telescope. Broad emission lines in the absence of X-…