Work

Irreversibility and Energy Transfer at Non-MHD Scales in a Magnetospheric Current Disruption Event

Year: 2025

Type: article

Abstract: Irreversibility and the processes occurring at ion and sub-ion scales are key challenges in understanding energy dissipation in non-collisional space plasmas. Recent advances have significantly improved the characterization of irreversibility and energy transfer across scales in turbulent fluid-like media, using high-order correlation functions and testing the validity of certain fluctuation relations. In this study, we explore irreversibility at non-MHD scales during a magnetospheric current disruption event. Our approach involves analyzing the asymmetric correlation function, assessing the validity of a fluctuation relation, and investigating delayed coupling between different scales to reveal evidence of a cascading mechanism. The results clearly demonstrate the irreversible nature of fluctuations at ion and sub-ion scales. Additionally, we provide potential evidence for an energy cascading mechanism occurring over short time delays.

Source: Entropy

DOI: 10.3390/e27030260

Authors: Giuseppe Consolini, Paola De Michelis

Institutions: Institute for Space Astrophysics and Planetology, National Institute for Astrophysics, Istituto Nazionale di Geofisica e Vulcanologia

Language: English

Topic: Solar and Space Plasma Dynamics

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: Ministero dell'Università e della Ricerca