EDP Sciences
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Volume 366, Number 1, January IV 2001
Page(s) 129 - 137
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20000031

A&A 366, 129-137 (2001)
DOI: 10.1051/0004-6361:20000031

Pulsar magnetospheres: Numerical simulations of large amplitude electron-positron oscillations

A. A. da Costa1, 2, D. A. Diver1 and G. A. Stewart1

1  Dept. of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
2  Centro de Electrodinâmica, Instituto Superior Técnico, 1049-001 Lisboa, Portugal

(Received 21 September 2000 / Accepted 24 October 2000 )

The numerical simulation of non-linear electron-positron oscillations is reported, showing the evolution of the electric field and the plasma number density for large amplitude disturbances. Sharp density gradients and changes in the oscillation frequency are demonstrated, and a new analytical framework is presented to illustrate these phenomena, particularly in the context of pulsar plasmas.

Key words: pulsars: general -- plasmas

Offprint request: D. A. Diver, diver@astro.gla.ac.uk

© ESO 2001