Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.409.1183v&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 409, Issue 3, pp. 1183-1194.
Physics
5
Black Hole Physics, Radiation Mechanisms: Non-Thermal, Methods: Numerical
Scientific paper
The development of pair-photon cascades initiated by high-energy electrons above a spinning supermassive black hole (BH) threaded by magnetic fields is simulated numerically. The calculations use the magnetic field strength, the rotation period of the BH, the energy and the density of the background photons as parameters and follow the synchrotron and inverse Compton radiation emitted by the primary electron, the conversion of this radiation to e+ e- pairs in the background photons and the radiation by the pairs over several generations. A Monte Carlo method is used to calculate the γ-ray and pair spectra for cascades in different parts of the magnetosphere. Based on a three-dimensional picture, the modelling of electron and photon trajectories in the vicinity of the BH takes into account the effects of general relativity and the radiation reaction on particle motion. This work is motivated by the recent discovery of very-high-energy processes close to the supermassive BH in active galaxies.
LeBohec Steohan
Vincent Samir
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