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dc.contributor.authorChen, Xuhui
dc.contributor.authorBöttcher, Markus
dc.contributor.authorPohl, Martin
dc.date.accessioned2016-08-26T06:51:14Z
dc.date.available2016-08-26T06:51:14Z
dc.date.issued2015
dc.identifier.citationChen, X. et al. 2015. Particle diffusion and localized acceleration in inhomogeneous AGN jets. I. Steady-state spectra. Monthly notices of the Royal Astronomical Society, 447:530-544. [https://doi.org/10.1093/mnras/stu2438]en_US
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/18415
dc.identifier.urihttps://doi.org/10.1093/mnras/stu2438
dc.identifier.urihttp://mnras.oxfordjournals.org/content/447/1/530.full.pdf+html
dc.description.abstractWe 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 (SSC) emission are considered in a leptonic model. To account for inhomogeneity, we use a 2D axisymmetric 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 γ-ray spectra observed in some blazarsen_US
dc.language.isoenen_US
dc.publisherOxford University Pressen_US
dc.subjectAcceleration of particlesen_US
dc.subjectdiffusionen_US
dc.subjectradiation mechanisms: non-thermal galaxiesen_US
dc.subjectgalaxies: activeen_US
dc.subjectgalaxies: jetsen_US
dc.titleParticle diffusion and localized acceleration in inhomogeneous AGN jets. I. Steady-state spectraen_US
dc.typeArticleen_US
dc.contributor.researchID24420530 - Böttcher, Markus


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