Browsing Faculty of Natural and Agricultural Sciences by Author "74058215-a7e0-4898-8d2d-7d10f827b1e3"
Now showing items 1-5 of 5
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Attenuation of TeV γ-rays by the starlight photon field of the host galaxy
Zacharias, Michael; Chen, Xuhui; Wagner, Stefan J. (Oxford Univ Press, 2017)The absorption of TeV γ-ray photons produced in relativistic jets by surrounding soft photon fields is a long-standing problem of jet physics. In some cases, the most likely emission site close to the central black hole ... -
Multiwavelength polarization as a diagnostic of blazar physics
Böttcher, Markus; Zhang, Haocheng; Chen, Xuhui (Sissa Medialab, 2015)The nature of the high-energy emission in jet-dominated AGN (especially blazars) as well as the location and mode of acceleration of particles to ultra- relativistic energies are a matter of intensive debate. Both leptonic ... -
Particle diffusion and localized acceleration in inhomogeneous AGN jets. I. Steady-state spectra
Chen, Xuhui; Böttcher, Markus; Pohl, Martin (Oxford University Press, 2015)We 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 ... -
Particle diffusion and localized acceleration in inhomogeneous AGN jets. II. Stochastic variation
Chen, Xuhui; Böttcher, Markus; Pohl, Martin; Gao, Shan (Oxford Univ Press, 2016)We study the stochastic variation of blazar emission under a 2D spatially resolved leptonic jet model we previously developed. Random events of particle acceleration and injection in small zones within the emission region ... -
Polarization swings reveal magnetic energy dissipation in blazars
Zhang, Haocheng; Böttcher, Markus; Chen, Xuhui; Guo, Fan; Li, Hui (American Astronomical Society, 2015)The polarization signatures of blazar emissions are known to be highly variable. In addition to small fluctuations of the polarization angle around a mean value, large (gsim180°) polarization angle swings are sometimes ...