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7h ago

DKIST Captures First Direct Evidence of Kelvin‑Helmholtz Vortices on the Sun's Surface

Researchers say the finding could let them measure how tiny plasma whirlpools twist magnetic fields to transport energy toward the corona.

The sun's visible surface, or photosphere, in an image taken by the Hawaii-based Inouye Solar Telescope, in this handout image released August 5, 2026. The image reveals deformed boundaries of magnetic elements and ultra-fine scale stripes, both associated with a phenomenon called Kelvin-Helmholtz instability. NSF/NSO/AURA/MPS/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. NO RESALES. NO ARCHIVES. MANDATORY CREDIT.
Image

Overview

  • The Daniel K. Inouye Solar Telescope produced the highest‑resolution images to date and the team published results in Nature on Wednesday, August 5 showing small swirling plasma structures on the photosphere.
  • Those swirls measure about 19 to 170 kilometers across and match the signature of Kelvin‑Helmholtz instability, a shear‑driven process long predicted but never directly observed on a star’s visible surface.
  • High‑resolution magnetohydrodynamic simulations reproduced the observed vortex spacing and dynamics, strengthening the interpretation that the features are real plasma instabilities rather than imaging artifacts.
  • The vortices appear widespread at boundaries between magnetic elements and can twist and mix magnetic field lines, a behavior that could help move energy upward and build the stresses that lead to flares and coronal mass ejections.
  • Scientists plan longer, high‑cadence DKIST campaigns and automated pattern‑recognition on larger data sets to measure how common the vortices are and how much energy they deliver to higher layers, work that could improve space‑weather forecasts for satellites and power grids.