Formation of e^+e^- relativistic collisionless shocks

Details Formation of e^+e^- relativistic collisionless shocks Formation of e^+e^- relativistic collisionless shocks

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dppqp1012s&link_type=abstract

American Physical Society, 44th Annual Meeting of the Division of Plasma , abstract #QP1.012

Astronomy and Astrophysics

Astrophysics

Scientific paper

Relativistic particle acceleration in astrophysical scenarios such as gamma-ray bursters, radio supernovae and pulsar winds is usually associated with relativistic shocks. Shock formation and shock acceleration are still open questions that can only be definetely addressed via fully kinetic simulations. We present three-dimensional PIC simulation results, using OSIRIS, for relativistic shock formation in electron-positron plasmas in unmagnetized and magnetized scenarios. The shock is formed from the collision of a moving electron-positron plasma shell with the background plasma. For unmagnetized plasmas, we show that the electromagnetic beam plasma instability can generate the required magnetic fields for shock formation in three dimensions. Our results also provide the spectral features of the accelerated particles. Comparisons with non-self consistent models for shock acceleration will also be presented.

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