Mechanism of nonlinear oscillitons evolved from simple solitary waves

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Ma, John Z. G.^1 ; Hirose, A.^2

Space Science Branch, Canadian Space Agency, 6767, Route de l'Aeroport, Longueuil (Saint-Hubert), QC J3Y 8Y9, Canada^1

Plasma Physics Laboratory, University of Saskatchewan, 116 Science Place, Saskatoon, SK S7N 5E2, Canada^2

关键词: Amplitude modulated;    Electron inertia;    Electron ions;    Multi frequency;    Self-similar;    Simple wave;    Single frequency;    Space plasmas;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012006/pdf
DOI  :  10.1088/1742-6596/511/1/012006

来源: IOP

【 摘 要 】

Besides three conventional, nonlinear simple waves (namely, sinusoidal, sawtooth, and spicky / bipolar) measured in space plasmas, numerous extraordinary nonlinear oscillitons (i.e., amplitude-modulated solitons) have been captured by satellites in last decades. By employing a self-similar, two-fluid (electron-ion) model, we focus on the evolution from single-frequency solitary waves to multi-frequency oscillitons. It is shown that the structures can be triggered by either the charge non-neutrality auto-modulationally, or the electron inertia mutual-modulationally.