Jitter Radiation Model of Crab Gamma Ray Flares
Abstract
The gamma ray flares of the Crab nebula detected by Fermi and AGILE satellites challenge our understanding of physics of pulsars and their nebulae. The central problem is that the peak energy of the flares exceeds the maximum energy E determined by synchrotron radiation loss. However, when there exist turbulent magnetic fields with scales AB smaller than 2icmc2 /eB, jitter radiation can emit photons with energy higher than E . The scale required for the Crab flares is about two order of magnitude less than the wavelength of the striped wind. We discuss the model in which the flares are triggered by plunging of the high density blobs into the termination shock. The observed hard spectral shape may be explained by jitter mechanism. We make three observational predictions: first. the polarization degree will become lower in flare state, second. no counterpart will be seen in TeV-PeV range, and third, the flare spectrum will not be harder than vF o
- Publication:
-
International Cosmic Ray Conference
- Pub Date:
- 2013
- Bibcode:
- 2013ICRC...33.1212T
- Keywords:
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- Crab nebula;
- gamma ray;
- jitter radiation