51 citations · 146 across the 7 of their papers we have counts for
7 papers
Synthetic Spectra from Particle-in-cell Simulations of Relativistic Jets containing an initial Toroidal Magnetic Field
Ioana Dutan, Kenichi Nishikawa, Athina Meli +6
The properties of relativistic jets, their interaction with the environment, and their emission of radiation can be self-consistently studied by using collisionless particle-in-cel…
3D PIC Simulations for Relativistic Jets with a Toroidal Magnetic Field
A. Meli, K. Nishikawa, C. Koehn +6
We have investigated how kinetic instabilities such as the Weibel instability (WI), the mushroom instability (MI), and the kinetic Kelvin-Helmholtz instability (kKHI) are excited i…
PIC methods in astrophysics: Simulations of relativistic jets and kinetic physics in astrophysical systems
Kenichi Nishikawa, Ioana Dutan, Christoph Koehn +1
The Particle-In-Cell (PIC) method has been developed by Oscar Buneman, Charles Birdsall, Roger W. Hockney, and John Dawson in the 1950s and, with the advances of computing power, h…
Streamer propagation in the atmosphere of Titan and other N2:CH4 mixtures compared to N2:O2 mixtures
Christoph Köhn, Sasa Dujko, Olivier Chanrion +1
Streamers, thin, ionized plasma channels, form the early stages of lightning discharges. Here we approach the study of extraterrestrial lightning by studying the formation and prop…
The Planck length and the constancy of the speed of light in five dimensional space parametrized with two time coordinates
Christoph Köhn
In relativity and quantum field theory, the vacuum speed of light is assumed to be constant; the range of validity of general relativity is determined by the Planck length. However…
Influence of Atmospheric Electric Fields on the Radio Emission from Extensive Air Showers
T. N. G. Trinh, O. Scholten, S. Buitink +15
The atmospheric electric fields in thunderclouds have been shown to significantly modify the intensity and polarization patterns of the radio footprint of cosmic-ray-induced extens…
Angular distribution of Bremsstrahlung photons and of positrons for calculations of terrestrial gamma-ray flashes and positron beams
Christoph Köhn, Ute Ebert
Within thunderstorms electrons can gain energies of up to hundred(s) of MeV. These electrons can create X-rays and gamma-rays as Bremsstrahlung when they collide with air molecules…