Work

Solar wind magnetohydrodynamic turbulence energy transfer rate ordered by magnetic field topology

Year: 2025

Type: article

Abstract: The magnetic field fluctuations that mediate a magnetohydrodynamic turbulent cascade have distinct magnetic topologies and associated energy transfer rates. Magnetic field topology is classified by the magnetic field gradient tensor constructed from solar wind observations by the four spacecraft tetrahedron on a scale of ∼ 40 proton gyroradii. Energy transfer rates are estimated instantaneously from the third-order term. We find on average 25% and up to 60% larger forward energy transfer rates in hyperbolic topology compared to flux ropes/plasmoids. Hyperbolic topology, consistent with reconnection, preferentially contributes to the forward energy cascade in magnetohydrodynamic turbulence in the solar wind. This forward cascade is a candidate mechanism for heating the solar wind.

Source: Physical Review Research

DOI: 10.1103/9wb2-r437

Authors: B. Hnat, S. C. Chapman, C. M. Liptrott, N. W. Watkins

Institutions: University of Warwick, London School of Economics and Political Science

Language: English

Topic: Solar and Space Plasma Dynamics

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: gold

Estimated APC paid: $2,625