HR: 09:30h
AN: NG21A-07    [Abstracts]
TI: A new exact solution of finite amplitude Alfven wave in a relativistic pair plasma
AU: Munoz, V
EM: vmunoz@esst.kyushu-u.ac.jp
AF: ESST, Kyushu University, 6-1 Kasuga Koen, Kasuga, 816-8580 Japan
AU: Matsukiyo, S
EM: matsukiy@esst.kyushu-u.ac.jp
AF: ESST, Kyushu University, 6-1 Kasuga Koen, Kasuga, 816-8580 Japan
AU: Ikeda, M
EM: ikeda@esst.kyushu-u.ac.jp
AF: ESST, Kyushu University, 6-1 Kasuga Koen, Kasuga, 816-8580 Japan
AU: * Hada, T
EM: hada@esst.kyushu-u.ac.jp
AF: ESST, Kyushu University, 6-1 Kasuga Koen, Kasuga, 816-8580 Japan
AB: The dispersion relation of a finite amplitude, parallel, circularly polarized Alfven wave in a relativistic electron-positron plasma is derived exactly, without assuming weak relativistic effects, for the first time to the authors' knowledge. As usual, the dispersion relation consists of electromagnetic (light) waves and Alfven waves, both degenerated due to identical mass of electrons and positrons. However, when the relativistic effects are fully taken into account, there appears a critical wave number above which the Alfven wave ceases to exist. Details of the dispersion relation as well as its implications to astro-plasma physics will be discussed.
DE: 7534 Radio emissions
DE: 7868 Wave/wave interactions
DE: 2149 MHD waves and turbulence
SC: Nonlinear Geophysics [NG]
MN: 2004 AGU Fall Meeting