Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrve..70c6401d&link_type=abstract
Physical Review E, vol. 70, Issue 3, id. 036401
Astronomy and Astrophysics
Astrophysics
11
Corotating Streams, Solitons, Bgk Modes, Particle Acceleration, Gamma-Ray Sources, Gamma-Ray Bursts
Scientific paper
Synchrotron emission suggests the presence of TeV electrons at various astrophysical objects. We propose a mechanism for the acceleration of electrons to ultrahigh energies (UHE) by intense electrostatic waves (ESWs). The latter are driven by dense proton beams that move at relativistic speeds relative to a background plasma and the electrons are accelerated by their nonlinear interaction with the ESWs. We follow the evolution of the wave instability by means of particle-in-cell (PIC) simulations. After the instability has saturated, we obtain spatially confined electron voids in which secondary instabilities develop due to resonant interactions between the beams and the background protons, generating intense ESWs which accelerate electrons to ultrarelativistic speeds within times of a few hundred inverse plasma frequencies.
Dieckmann Mark Eric
Eliasson Baldur
Kant Shukla Padma
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