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Possible Effects of Pair Echoes on Gamma-Ray Burst Afterglow Emission
Kohta Murase, Bing Zhang, Keitaro Takahashi +1
High-energy emission from gamma-ray bursts (GRBs) is widely expected but had been sparsely observed until recently when the Fermi satellite was launched. If >TeV gamma rays are pro…
Implications of Ultra-High-Energy Cosmic Rays for Transient Sources in the Auger Era
Kohta Murase, Hajime Takami
We study about ultra-high-energy cosmic rays (UHECRs) from transient sources, propagating in the Galactic and intergalactic space. Based on the recent observational results, we als…
Prompt high-energy neutrinos from gamma-ray bursts in photospheric and synchrotron self-Compton scenarios
Kohta Murase
We investigate neutrino emission from gamma-ray bursts (GRBs) under alternative scenarios for prompt emission (the photospheric and synchrotron self-Compton scenarios) rather than…
Detectability of Pair Echos from Gamma-Ray Bursts and Intergalactic Magnetic Fields
Keitaro Takahashi, Kohta Murase, Kiyotomo Ichiki +2
High-energy emission from gamma-ray bursts (GRBs) can give rise to pair echos, i.e. delayed inverse Compton emission from secondary pairs produced in interactions w…
Probing Intergalactic Magnetic Fields in the GLAST Era through Pair Echo Emission from TeV Blazars
Kohta Murase, Keitaro Takahashi, Susumu Inoue +2
More than a dozen blazars are known to be emitters of multi-TeV gamma rays, often with strong and rapid flaring activity. By interacting with photons of the cosmic microwave and in…
Cosmic Rays Above the Second Knee from Clusters of Galaxies and Associated High-Energy Neutrino Emission
Kohta Murase, Susumu Inoue, Shigehiro Nagataki
Accretion and merger shocks in clusters of galaxies are potential accelerators of high-energy protons, which can give rise to high-energy neutrinos through pp interactions with the…