40 citations · 59 across the 7 of their papers we have counts for
8 papers
External Entropy Production and Human Evolution toward Multi-body Life
Yasuji Sawada, Kenji Toma
Ancient human beings started "external entropy production" in a late stage of evolution, in addition to the internal entropy production by which energy was dissipated within the bo…
Nonuniform Particle Injection into Black Hole Jets by Radiative Magnetic Reconnection
Rin Oikawa, Kenji Toma, Shigeo S. Kimura
Active galactic nuclei often exhibit highly collimated relativistic plasma outflows launched from the vicinity of their central black holes. One of the key theoretical challenges i…
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…
Multi-wavelength Emission from Jets and Magnetically Arrested Disks in Nearby Radio Galaxies: Application to M87
Riku Kuze, Shigeo S. Kimura, Kenji Toma
Radio galaxies are a subclass of active galactic nuclei that drive relativistic jets from their center and are observed in radio to very-high-energy gamma rays. The emission mechan…
1D GRPIC Simulations of Stellar-Mass Black Hole Magnetospheres: Semi-Analytic Model of Gamma-Rays from Gaps
Koki Kin, Shota Kisaka, Kenji Toma +2
In the absence of a sufficient amount of plasma injection into the black hole (BH) magnetosphere, the force-free state of the magnetosphere cannot be maintained, leading to the eme…
POET: POlarimeters for Energetic Transients
J. E. Hill, M. L. McConnell, P. Bloser +15
POET (Polarimeters for Energetic Transients) is a Small Explorer mission concept proposed to NASA in January 2008. The principal scientific goal of POET is to measure GRB polarizat…