Density Fluctuations Induced by Modulational Instability of Parallel Propagating Alfven Waves with β_f〜1(Astrophysics, cosmology, and geophysics)

スポンサーリンク

概要

• 論文の詳細を見る

• Density fluctuations generated by envelope modulation of Alfven waves are studied when the sound to Alfven velocity ratio C_S/C_A (≡√<β_f>)〜1, using a kinetic version of the triple-degenerate derivative nonlinear Schrodinger (TDNLS) equation set, in which both right- and left-hand polarized quasi-parallel Alfven waves as well as sound waves, all propagating in the same direction, are included. In the model, kinetic effects along the longitudinal direction are introduced phenomenologically. Long time evolution of the Alfven waves are discussed by numerically time integrating the obtained TDNLS model. The TDNLS model reproduces not only features of the well-known derivative nonlinear Schrodinger (DNLS) model, but also results obtained from more general frameworks. Numerical results suggest that the nonlinearly-driven modulational instability can play important roles in the dissipation of both right- and left-hand polarized Alfven waves in the solar wind.

• 社団法人日本物理学会の論文
• 2007-07-15

著者

• Hada Tohru

  Department Of Earth System Science And Technology Kyushu University

• NARIYUKI Yasuhiro

  Department of Earth System Science and Technology, Kyushu University

• Nariyuki Yasuhiro

  Department Of Earth System Science And Technology Kyushu University

関連論文

• Shock Modification by Cosmic-Ray-Excited Turbulences(Chapter 6. SN1006 Milenium Special Session, The Extreme Universe in the Suzaku Era)
• Comparison between the Landau and Cyclotron Resonances in the Electron Beam-Plasma Interactions
• Anomalous Diffusion of Cosmic Rays in Magnetic Field Turbulence : Linkage between Diffusion Statistics and Turbulence Statistics(COMPLEXITY AND NONEXTENSIVITY:NEW TRENDS IN STATISTICAL MECHANICS)
• Density Fluctuations Induced by Modulational Instability of Parallel Propagating Alfven Waves with β_f〜1(Astrophysics, cosmology, and geophysics)

スポンサーリンク