6 papers
On the Field-Aligned Particle Acceleration in the presence of Electron-Positron Pairs
S. Shibata, J. Miyazaki, F. Takahara
We study self-consistency for the pulsar polar cap model. In general, there will remain an unscreened electric field at the pair production front (PPF). We have derived the conditi…
Electric Field Screening by Pairs in the Presence of Returning Positrons
Shinpei Shibata
We solve the one-dimensional Poisson equation along a magnetic field line, both analytically and numerically, for a given current density incorporating effects of returning positro…
Electrodynamic Structure of an Outer-Gap Accelerator: Implausibility of Super Goldreich-Julian Current
Kouichi Hirotani, Shinpei Shibata
We investigate a stationary pair production cascade in the outer magnetosphere of a spinning neutron star. The charge depletion due to global flows of charged particles, causes a l…
Electrodynamic Structure of an Outer-Gap Accelerator: Gamma-Ray Emission from the Crab Pulsar
Kouichi Hirotani, Shinpei Shibata
We investigate a stationary pair production cascade in the outer magnetosphere of a spinning neutron star. The charge depletion due to a global current, causes a large electric fie…
Pulse shape and spectrum of PSR J0218+4232 observed with BeppoSAX
T. Mineo, G. Cusumano, L. Kuiper +9
We present the results of a BeppoSAX observation of PSR J0218+4232 which, for the first time, provides detailed information on the pulsar's temporal and spectral emission propertie…
Pulsar Electrodynamics
Shinpei Shibata
First I emphasize the magnetospheric loop current system induced by the wind activity. Next, I address the formation of the field-aligned electric field. An interesting aspect is t…