10 citations · 16 across the 3 of their papers we have counts for
4 papers
Collimation of a spherical collisionless particles stream in Kerr space-time
Kentaro Takami, Yasufumi Kojima
We examine the propagation of collisionless particles emitted from a spherical shell to infinity. The number distribution at infinity, calculated as a function of the polar angle,…
Probing the Structure of Gamma-Ray Burst Jets with Steep Decay Phase of their Early X-ray Afterglows
Kentaro Takami, Ryo Yamazaki, Takanori Sakamoto +1
We show that the jet structure of gamma-ray bursts (GRBs) can be investigated with the tail emission of the prompt GRB. The tail emission which we consider is identified as a steep…
A Unified Model of the Prompt Optical Emission of Gamma-Ray Bursts
Hirotsugu Doi, Kentaro Takami, Ryo Yamazaki
The observational diversity of optical emission, which coincides with prompt gamma-ray bursts (GRBs), has been discovered in the recent Swift era. We show that on the assumption of…
Tidal effects on magnetic gyration of a charged particle in Fermi coordinates
Yasufumi Kojima, Kentaro Takami
We examine the gyration motion of a charged particle, viewed from a reference observer falling along the Z axis into a Schwarzschild black hole. It is assumed that the magnetic fie…