Volume 371 - 7th Annual Conference on High Energy Astrophysics in Southern Africa (HEASA2019) - Modelling I (Chair: Markus Böttcher)
Effects of the gamma-ray absorption in the broadline region and secondary cascade emission on blazar spectra
M. Ntshatsha
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Abstract
Blazars are a class of active galactic nuclei (AGN) characterized by large luminosity that varies on relatively short timescales. Using a generic emission model for the broad line region (BLR) we calculate the interaction of gamma-rays in the jet with BLR photons, and the distribution of the secondary electron-positron (e$^\pm$) pairs produced. We also calculate the synchrotron and inverse Compton emission by the e$^\pm$ pairs, which constitute a source of secondary gamma-ray emission. We fit the spectral energy distributions (SEDs) of some bright \textit{Fermi}-LAT blazars, and study the effect of these considerations on the observed gamma-ray flux of blazars.
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