EDP Sciences
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Volume 387, Number 1, May III 2002
Page(s) 339 - 346
Section Physical and chemical processes
DOI http://dx.doi.org/10.1051/0004-6361:20020302

A&A 387, 339-346 (2002)
DOI: 10.1051/0004-6361:20020302

Coupling between electrostatic and electromagnetic behaviour in a cylindrical equal-mass plasma

D. A. Diver1, A. A. da Costa2 and E. W. Laing1

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 12 December 2001 / Accepted 27 February 2002)

The electron-positron plasma present in pulsar magnetospheres may have non-linear electrostatic oscillations, which can couple to electromagnetic waves if the magnetic field present is inhomogeneous. Using a cylindrical geometry the basic equations are derived, and using a simplified linear approach characteristic linear modes are identified and analysed. A possible coupling mechanism is discussed, and possible consequences for pulsar radiation mechanisms are inferred.

Key words: plasmas -- radiation mechanisms: non-thermal -- pulsars: general

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

© ESO 2002