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- W3100106827 abstract "The majority of the extragalactic sources yet detected at TeV photon energies belong to the class of high-frequency-peaked BL Lac objects (HBLs) that exhibit a spectral energy distribution with a lower peak in the X-ray band. Such spectra are well described in terms of a log-parabolic shape with considerable curvature, and widely interpreted as synchrotron emission from ultrarelativistic electrons outflowing in a relativistic jet; these are expected to radiate also in γ-rays through the inverse Compton process. Recently, we have compared the X-ray spectral parameter distributions of TeV detected HBLs (TBLs) with those undetected (UBLs), and found that the distributions of the peak energies Ep are similarly symmetric around a value of a few keVs for both subclasses, while the X-ray spectra are broader for TBLs than for UBLs. Here we propose an acceleration scenario to interpret both the Ep and the spectral curvature distributions in terms of a coherent and a stochastic acceleration mechanisms, respectively. We show how the curvature parameter b ≃ 0.3–0.7 of the synchrotron X-rays, which depends only on the latter acceleration component, can be related to the inverse Compton luminosity in γ-rays, thus introducing a link between the X-ray and the TeV observations of HBLs." @default.
- W3100106827 created "2020-11-23" @default.
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- W3100106827 date "2011-11-11" @default.
- W3100106827 modified "2023-09-29" @default.
- W3100106827 title "X-RAY AND TeV EMISSIONS FROM HIGH-FREQUENCY-PEAKED BL LAC OBJECTS" @default.
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- W3100106827 doi "https://doi.org/10.1088/2041-8205/742/2/l32" @default.
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