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Flares in the Crab Nebula Driven by Untwisting Magnetic Fields View all abstracts by submitter

Markus J. Aschwanden   Submitted: 2012-04-30 15:35

The recent discovery of PeV electrons from the Crab nebula, produced on rapid time scales of one day or less with a sharply peaked gamma-ray spectrum without hard X-rays, challenges traditional models of diffusive shock acceleration followed by synchrotron radiation. Here we outline an accleration model involving a DC electric field parallel to the magnetic field in a twisted toroidal field around the pulsar. Sudden developments of resistivity in localized regions of the twisted field are thought to drive the particle acceleration, up to PeV energies, resulting in flares. This model can reproduce the observed time scales of T = 1 day, the peak photon energies of U_rr = 1 MeV, maximum electron energies of U_err = 1 PeV, and luminosities of L = 1036 erg/s.

Authors: Peter Sturrock and Markus J. Aschwanden
Projects: None

Publication Status: ApJ Lett. (accepted April 30, 2012; in press)
Last Modified: 2012-05-01 10:16
Go to main E-Print page  Observational Study Of the Quasi-Periodic Fast Propagating Magnetosonic Waves and the Associated Flare on 2011 May 30  The Diagnostic Potential of Transition Region Lines under-going Transient Ionization in Dynamic Events  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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