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13 papers · 2 filters
A three-dimensional numerical method for modelling weakly ionized plasmas
S. O'Sullivan, T. P. Downes
Astrophysical fluids under the influence of magnetic fields are often subjected to single-fluid or two-fluid approximations. In the case of weakly ionized plasmas however, this can…
Observations of the Unidentified TeV Gamma-Ray Source TeV J2032+4130 with the Whipple Observatory 10 m Telescope
A. Konopelko, R. W. Atkins, G. Blaylock +58
We report on observations of the sky region around the unidentified TeV gamma-ray source TeV J2032+4130 carried out with the Whipple Observatory 10 m atmospheric Cherenkov telescop…
Supermassive binary black holes among cosmic gamma-ray sources
Frank M. Rieger
Supermassive binary black holes (SBBHs) are a natural outcome of galaxy mergers. Here we show that low-frequency ( Hz) quasi-periodic variability observed from cosm…
A microscopic analysis of shear acceleration
Frank M. Rieger, Peter Duffy
A microscopic analysis of the viscous energy gain of energetic particles in (gradual) non-relativistic shear flows is presented. We extend previous work and derive the Fokker-Planc…
Fermi acceleration in astrophysical jets
Frank M. Rieger, Valenti Bosch-Ramon, Peter Duffy
We consider the acceleration of energetic particles by Fermi processes (i.e., diffusive shock acceleration, second order Fermi acceleration, and gradual shear acceleration) in rela…
A current driven instability in parallel, relativistic shocks
B. Reville, J. G. Kirk, P. Duffy
Recently, Bell has reanalysed the problem of wave excitation by cosmic rays propagating in the pre-cursor region of a supernova remnant shock front. He pointed out a strong, non-re…