902 citations · 3.2k across the 78 of their papers we have counts for
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Two-component jet model for multiwavelength afterglow emission of the extremely energetic burst GRB 221009A
Yuri Sato, Kohta Murase, Yutaka Ohira +1
Recently gamma-ray bursts (GRBs) have been detected at very high-energy (VHE) gamma-rays by imaging atmospheric Cherenkov telescopes, and a two-component jet model has often been i…
Synchrotron Self-Compton Emission in the Two-Component Jet Model for Gamma-Ray Bursts
Yuri Sato, Kaori Obayashi, B. Theodre Zhang +4
Gamma-ray bursts (GRBs) are intense bursts of high-energy photons (prompt emissions) caused by relativistic jets. After the emissions, multi-wavelength afterglows, from radio to ve…
Probing particle acceleration at trans-relativistic shocks with off-axis gamma-ray burst afterglows
Kazuya Takahashi, Kunihito Ioka, Yutaka Ohira +1
Particle acceleration is expected to be different between relativistic and non-relativistic collisionless shocks. We show that electromagnetic counterparts to gravitational waves (…
Escape of cosmic rays from perpendicular shocks in the circumstellar magnetic field
Shoma F. Kamijima, Yutaka Ohira
We investigate the escape process of cosmic rays (CRs) from perpendicular shock regions of a spherical shock propagating to a circumstellar medium with the Parker-spiral magnetic f…
The Gamma-Ray Emission from the Supernova Remnant RX J1713.7-3946 Interacting with Two-phase Medium
Yutaka Fujita, Ryo Yamazaki, Yutaka Ohira
We study the origin of gamma rays from the supernova remnant (SNR) RX J1713.7-3946. Using an analytical model, we calculate the distribution of cosmic rays (CRs) around the SNRs. M…
Interaction of a Relativistic Magnetized Collisionless Shock with a Dense Clump
Sara Tomita, Yutaka Ohira, Shigeo S. Kimura +2
The interactions between a relativistic magnetized collisionless shock and dense clumps have been expected to play a crucial role on the magnetic field amplification and cosmic-ray…
Biermann Battery Powered by Resistive Heating Induced by Cosmic Ray Streaming
Shota L. Yokoyama, Yutaka Ohira
It is recently proposed that cosmic rays generate a seed magnetic field in the early universe. In this paper, we propose another generation mechanism of magnetic fields by cosmic r…
X-ray Line Diagnostics of Ion Temperature at Cosmic-Ray Accelerating Collisionless Shocks
Jiro Shimoda, Yutaka Ohira, Aya Bamba +4
A novel collisionless shock jump condition is suggested by modeling the entropy production at the shock transition region. We also calculate downstream developments of the atomic i…