MG12 - Talk detail |
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Participant |
Medvedev, Mikhail | |
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Institution |
University of Kansas - Physics & Astronomy Department, 1251 Wescoe Hall Drive, Malott Hall, Room 1082 - Lawrence - Kansas - USA | |
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Session |
Talk |
Abstract |
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ANM8 |
Physics and observational signatures of sub-Larmor scale fields |
An extensive body of studies indicate that sub-Larmor-scale magnetic turbulence is natural at relativistic collisionless shocks and other high-energy density environments. The recently proposed theoretical model of the prompt emission is build upon unique spectral properties of jitter radiation — the radiation from such small-scale magnetic fields. Here we present the results of numerical implementation of the model and discuss observational signatures of the tangled fields. We show that the anisotropy of the jitter radiation pattern and relativistic shock kinematics altogether produce effects commonly observed in time-resolved spectra of prompt emission, e.g., the softening of the spectrum below the peak energy within individual pulses in the prompt light-curve, the so-called “tracking” behavior, the emergence of synchrotron-violating spectra at the beginning of individual spikes. Several observational predictions of the model are discussed. |