Details

Autor(en) / Beteiligte

• Che, H
• Goldstein, M L
• Viñas, A F

Titel

Bidirectional energy cascades and the origin of kinetic Alfvénic and whistler turbulence in the solar wind

Ist Teil von

• Physical review letters, 2014-02, Vol.112 (6), p.061101-061101, Article 061101

Ort / Verlag

United States

Erscheinungsjahr

2014

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• The observed steep kinetic scale turbulence spectrum in the solar wind raises the question of how that turbulence originates. Observations of keV energetic electrons during solar quiet time suggest them as a possible source of free energy to drive kinetic turbulence. Using particle-in-cell simulations, we explore how the free energy released by an electron two-stream instability drives Weibel-like electromagnetic waves that excite wave-wave interactions. Consequently, both kinetic Alfvénic and whistler turbulence are excited that evolve through inverse and forward magnetic energy cascades.