Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.3324s&link_type=abstract
American Astronomical Society, HEAD meeting #11, #33.24; Bulletin of the American Astronomical Society, Vol. 41, p.709
Astronomy and Astrophysics
Astronomy
Scientific paper
In the jets of blazars such as 3C 66A, W Comae and 3C 279 whose gamma-ray emission extends beyond 100 GeV, possibly produced by Compton upscattering of radiation fields external to the jet, a large number of electron-positron pairs may be created by annihilation of primary very high energy (VHE) gamma-rays with soft photons from the external radiation fields. This could potentially induce Compton-supported pair cascades.
We have developed a Monte Carlo simulation code to model the development of these cascades and their dispersion by magnetic fields. We have applied this code to parameters characteristic of gamma-ray loud blazars detected by Fermi. The deflection of secondary particles by magnetic fields and thus dispersion of the cascade emission may make radio galaxies, believed to be mis-aligned blazars, sources of GeV gamma-rays, potentially detectable by Fermi.
Boettcher Markus
Sheikkyousefi Parisa R.
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