21 citations · 110 across the 9 of their papers we have counts for
9 papers
Large-scale Magnetic Field Model of GRB Afterglow Polarization: Effects of Field Anisotropy, Off-axis Viewing Angle, and Ordered Field
Asuka Kuwata, Kenji Toma, Sara Tomita +1
The afterglows of gamma-ray bursts are non-thermal electron synchrotron emissions from relativistic shocks. The origin of strong magnetic field in the emission region remains elusi…
Synchrotron Polarization of Gamma-Ray Burst Afterglow Shocks with Hydrodynamic-scale Turbulent Magnetic Field
Asuka Kuwata, Kenji Toma, Shigeo S. Kimura +2
Afterglows of gamma-ray bursts (GRBs) are emitted from expanding forward shocks, which are expected to have magnetic field much stronger than the interstellar field, although the o…
High-power laser experiment on developing supercritical shock propagating in homogeneously magnetized plasma of ambient gas origin
S. Matsukiyo, R. Yamazaki, T. Morita +30
A developing supercritical collisionless shock propagating in a homogeneously magnetized plasma of ambient gas origin having higher uniformity than the previous experiments is form…
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…
High-power laser experiment forming a supercritical collisionless shock in a magnetized uniform plasma at rest
Ryo Yamazaki, S. Matsukiyo, T. Morita +51
We present a new experimental method to generate quasi-perpendicular supercritical magnetized collisionless shocks. In our experiment, ambient nitrogen (N) plasma is at rest and we…
Anomalous plasma acceleration in colliding high-power laser-produced plasmas
T. Morita, K. Nagashima, M. Edamoto +20
We developed an experimental platform for studying magnetic reconnection in an external magnetic field with simultaneous measurements of plasma imaging, flow velocity, and magnetic…
Weibel-Mediated Shocks Propagating into Inhomogeneous Electron-Positron Plasmas
Sara Tomita, Yutaka Ohira, Ryo Yamazaki
The external forward shock emitting the gamma-ray burst (GRB) afterglow is collisionless, and it is mediated by the Weibel instability which generates the magnetic field. The GRB a…
Full particle-in-cell simulation of the interaction between two plasmas for laboratory experiments on the generation of magnetized collisionless shocks with high-power lasers
T. Umeda, R. Yamazaki, Y. Ohira +12
A preliminary numerical experiment is conducted for laboratory experiments on the generation of magnetized collisionless shocks with high-power lasers by using one-dimensional part…
Weibel instability driven by spatially anisotropic density structures
Sara Tomita, Yutaka Ohira
Observations of afterglows of gamma-ray bursts suggest (GRBs) that post-shock magnetic fields are strongly amplified to about 100 times the shock-compressed value. The Weibel insta…