Unifying MeV-blazars with GeV-blazars
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.
Keywords
Cite
@article{arxiv.astro-ph/0201508,
title = {Unifying MeV-blazars with GeV-blazars},
author = {M. Blazejowski and M. Sikora and R. Moderski and G. Madejski},
journal= {arXiv preprint arXiv:astro-ph/0201508},
year = {2007}
}
Comments
3 pages, 4 figures, poster presented at the conference "New visions of the X-ray Universe in the XMM Newton and Chandra Era", Noordwijk, November 2001