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Unifying MeV-blazars with GeV-blazars | | M.Blazejowski
; M.Sikora
; R.Moderski
; G.Madejski
; | | Date: |
30 Dec 2001 | | Subject: | astro-ph | | Affiliation: | CAMK), M.Sikora (CAMK, SLAC), R.Moderski (CAMK), G.Madejski (SLAC | | 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. | | Source: | arXiv, astro-ph/0201508 | | Services: | Forum | Review | PDF | Favorites | |
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