文章基本信息

标题：A phenomenological view of Fermi-INTEGRAL gamma-ray emitting AGNs, in the framework of leptonic SSC and EC scenario
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作者：A. Tramacere ; R. Walter ; C. Ricci 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2010
卷号：2010
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We propose a phenomenological approach that uses the spectral features of the rising part of the Inverse Compton emission of the blazars Spectral Energy Distribution, to derive the low-energy branch of the energy distribution of the emitting particles. We base our analysis on a leptonic, single-zone, homogeneous, Synchrotron Self-Compton, and External Compton scenario. Our analysis shows that is possible to use the values of photon index (X) observed in INTEGRAL Flat Spectrum Radio Quasars (FSRQs) and intermediate/low-peaked BL Lacs (I/LBLs), and the photon index ( ) observed in Fermi-LAT high-peaked BL Lacs (HBLs), to constrain the low-energy cut-o ( min), and the low-energy photon index (s), of the emitting particles energy distribution. We found, in the case of FSRQSs and I/LBL Lacs, that INTEGRAL data rule out a scenario with min>> 1 . In the case of HBLs, Fermi data hints for a scenario with min<< 104, in agreement with previous analysis of the HBL Mrk 421, based on simultaneous X-ray-to-UV data. The predicted ranges for s, derived from observed data, are ' [1:6􀀀2:4], and ' [1:2􀀀2:8], respectively for HBLs, and FSRQs and I/LBLs. The similarity in the range of the predicted values of s, and the same trend of the position of the low-energy cut-o of the electron distribution, observed in FSRQs and BL Lacs, are interesting features, hinting for a common acceleration scenario acting in the two classes of objects.