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000192772 0247_ $$2arXiv$$aarXiv:1411.4518
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000192772 0881_ $$aarXiv:1411.4518
000192772 088__ $$2arXiv$$aarXiv:1411.4518
000192772 1001_ $$0P:(DE-H253)PIP1018140$$aChen, Xuhui$$b0$$eCorresponding Author$$udesy
000192772 245__ $$aParticle diffusion and localized acceleration in inhomogeneous AGN jets - Part I: Steady-state spectra
000192772 260__ $$c2014
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000192772 520__ $$aWe study the acceleration, transport, and emission of particles in relativistic jets. Localized stochastic particle acceleration, spatial diffusion, and synchrotron as well as synchrotron self-Compton emission are considered in a leptonic model. To account for inhomogeneity, we use a 2D axi-symmetric cylindrical geometry for both relativistic electrons and magnetic field. In this first phase of our work, we focus on steady-state spectra that develop from a time-dependent model. We demonstrate that small isolated acceleration region in a much larger emission volume are sufficient to accelerate particles to high energy. Diffusive escape from these small regions provides a natural explanation for the spectral form of the jet emission. The location of the acceleration regions within the jet is found to affect the cooling break of the spectrum in this diffusive model. Diffusion-caused energy-dependent inhomogeneity in the jets predicts that the SSC spectrum is harder than the synchrotron spectrum. There can also be a spectral hardening towards the high-energy section of the synchrotron spectrum, if particle escape is relatively slow. These two spectral hardening effects indicate that the jet inhomogeneity might be a natural explanation for the unexpected hard {\gamma}-ray spectra observed in some blazars.
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000192772 7001_ $$0P:(DE-H253)PIP1010085$$aPohl, Martin$$b1$$udesy
000192772 7001_ $$0P:(DE-HGF)0$$aBoettcher, Markus$$b2
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000192772 9141_ $$y2014
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000192772 9132_ $$0G:(DE-HGF)POF3-613$$1G:(DE-HGF)POF3-610$$2G:(DE-HGF)POF3-600$$aDE-HGF$$bForschungsbereich Materie$$lMaterie und Universum$$vMatter and Radiation from the Universe$$x0
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