Linking Langevin equation to scaling properties of space plasma turbulence at sub-ion scales

Autor:	Benella, Simone, Stumpo, Mirko, Alberti, Tommaso, Pezzi, Oreste, Papini, Emanuele, Yordanova, Emiliya, Valentini, Francesco, Consolini, Giuseppe
Rok vydání:	2023
Předmět:	Physics - Plasma Physics Physics - Space Physics
Druh dokumentu:	Working Paper
Popis:	Current understanding of the kinetic-scale turbulence in weakly-collisional plasmas still remains elusive. We employ a general framework in which the turbulent energy transfer is envisioned as a scale-to-scale Langevin process. Fluctuations in the sub-ion range show a global scale invariance, thus suggesting a homogeneous energy repartition. In this Letter, we interpret such a feature by linking the drift term of the Langevin equation to scaling properties of fluctuations. Theoretical expectations are verified on solar wind observations and numerical simulations thus giving relevance to the proposed framework for understanding kinetic-scale turbulence in space plasmas. Comment: Accepted for publication in Physical Review Research
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2306.07846 Zobrazit plný text záznamu View this record from Arxiv