The First 3D Coronal Loop Model Heated by MHD Waves against Radiative Losses

TL;DR

This paper presents the first 3D MHD simulation of a coronal loop heated by waves, demonstrating wave energy dissipation overcoming radiative cooling, thus advancing understanding of coronal heating mechanisms.

Contribution

It introduces the first 3D MHD model showing wave-driven heating of coronal loops against radiative losses, highlighting wave dissipation via Kelvin-Helmholtz instability.

Findings

Wave energy is transferred to smaller scales and dissipated.

Kelvin-Helmholtz instability deforms the loop cross-section.

Wave heating overcomes radiative cooling in the model.

Abstract

In the quest to solve the long-standing coronal heating problem, it has been suggested half a century ago that coronal loops could be heated by waves. Despite the accumulating observational evidence of the possible importance of coronal waves, still no 3D MHD simulations exist that show significant heating by MHD waves. Here we report on the first 3D coronal loop model heating the plasma against radiative cooling. The coronal loop is driven at the footpoint by transverse oscillations and subsequently the induced Kelvin-Helmholtz instability deforms the loop cross-section and generates small-scale structures. Wave energy is transfered to smaller scales where it is dissipated, overcoming the internal energy losses by radiation. These results open up a new avenue to address the coronal heating problem.