Alfvénic Solitons in Ultrarelativistic Electron-Positron Plasmas

Details Alfvénic Solitons in Ultrarelativistic Electron-Positron Plasmas Alfvénic Solitons in Ultrarelativistic Electron-Positron Plasmas

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ap%26ss.253...97l&link_type=abstract

Astrophysics and Space Science, Volume 253, Issue 1, pp.97-106

Astronomy and Astrophysics

Astrophysics

24

Scientific paper

In electron-positron plasmas some of the plasma modes are decoupled due to the equal charge-to-mass ratio of both species. We derive the dispersion law for a low-frequency, generalized X-mode, which exists at all angles of propagation with respect to the static magnetic field. Its nonlinear evolution is governed by a Korteweg-de Vries equation, valid at all angles of propagation except strictly parallel propagation, for which a different approach leads to a vector form of the modified Korteweg-de Vries equation. The nonlinearity is strongest at perpendicular propagation. Ultrarelativistic effects are discussed.

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