Compton Spectrum from Poynting Flux Accelerated e+e- Plasma.

Details Compton Spectrum from Poynting Flux Accelerated e+e- Plasma. Compton Spectrum from Poynting Flux Accelerated e+e- Plasma.

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...20715102s&link_type=abstract

American Astronomical Society Meeting 207, #151.02; Bulletin of the American Astronomical Society, Vol. 37, p.1410

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We report the Compton scattering emission from the Poynting flux acceleration of electron-positron plasma simulated by the 2 (1)/(2) dimensional particle-in-cell(PIC) code. We study the intense electromagnetic pulse loaded with e+}-e{- plasma interacting with ambient blackbody soft photons. Driven by the strong electromagnetic field, the particles can be accelerated to ultrarelativistic energies with a power-low momentum distribution, resulting in the development of a power-low spectrum of photons via Compton scattering, (photon index is roughly -1.5-2.5). This is consistent with the Gamma-ray, X-ray power-law spectrum from the long duration GRBs. The emission has also strong angle dependence: the emission from 3-8 degree from the Poynting flux direction is harder than from the other angles. We will show these and other remarkable properties of Poynting flux acceleration and Compton spectral output, and discuss the agreement with the observed properties of GRBs and XRFs.

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