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Unifying MeV-blazars with GeV-blazars

M. Blazejowski·M. Sikora·R. Moderski·G. Madejski
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Abstract

We demonstrate that the spectral differences between Flat Spectrum Radio Quasars (FSRQ) with steep gamma-ray spectra (MeV-blazars) and FSRQ with flat gamma-ray spectra (GeV-blazars) can be explained by assuming that in the MeV-blazars, the production of gamma-rays is dominated by Comptonization of infrared radiation of hot dust, whereas in the GeV-blazars -- by Comptonization of broad emission lines. Additional ingredient, required to reach satisfactory unification, is an assumption that the radiating electrons are accelerated via a two step process, in the lower energy range -- following instabilities driven by shock-reflected ions, and in the higher energy range -- via resonant scatterings off Alfven waves. Our model predicts that on average, the MeV-blazars should vary on longer time scales than GeV-blazars.

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M. Blazejowski, M. Sikora, R. Moderski, G. Madejski. 2002-01-30. Unifying MeV-blazars with GeV-blazars. https://arxiv.org/abs/astro-ph/0201508

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