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Daniel K. Inouye Solar Telescope Observes Kelvin-Helmholtz Instabilities on Sun's Surface
Key points
- Kelvin-Helmholtz Instabilities (KHI) observed on Sun's surface.
- Discovery made using Daniel K. Inouye Solar Telescope.
- KHI appear as small, plasma whirlpool-like patterns.
- May explain outer atmosphere heating and magnetic energy dynamics.
- Highest-resolution image of Sun's visible surface captured.
Discovery of Kelvin-Helmholtz Instabilities
An international team of scientists has discovered Kelvin-Helmholtz Instabilities (KHI) on the surface of the Sun. This finding was made using the U.S. National Science Foundation Daniel K. Inouye Solar Telescope, located near the summit of Maui’s Haleakalā. The observation confirms a long-held theory about the presence of these instabilities in the Sun's plasma.
Highest-Resolution Solar Image
The telescope captured the highest-resolution image ever recorded of the Sun’s visible surface, known as the photosphere. This image reveals tiny plasma whirlpool-like patterns, which are the signature of KHI. These structures had not been previously observed due to their small scale, which is below the resolution capabilities of older telescopes.
Understanding KHI
Kelvin-Helmholtz instability is a phenomenon in fluid dynamics where rippled structures form when two fluids slide past each other at different speeds, generating shear forces that cause disturbances to grow into wave- or vortex-like flows. On the Sun, these vortices occur at the edges of granules, which are structures between 500 and 2000 km in size that densely cover the Sun’s visible surface.
Implications for Solar Physics
Researchers suggest that KHI may be a key factor in explaining why the Sun’s outer atmosphere reaches high temperatures. The instabilities could also play a role in how magnetic energy builds up and moves around on the Sun. This magnetic energy fuels solar flares and eruptions, which are forms of solar activity that can affect technology on Earth.
Collaborative Research
The research involved an international team of scientists from the NSF National Solar Observatory (NSO), NSF NCAR High Altitude Observatory (HAO), and the Max Planck Institute for Solar System Research (MPS). The study combines observations from the Daniel K. Inouye Solar Telescope with computer simulations to analyze the newly observed phenomena.
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How outlets covered it
Scientists using the Daniel K. Inouye Solar Telescope have observed Kelvin-Helmholtz instabilities, or vortexes, on the Sun's surface, confirming a long-held theory. This discovery could alter understanding of how heat, mass, and magnetic energy move through the Sun's atmosphere.
An international team of astronomers has released the highest-resolution image ever captured of the Sun's visible surface, taken by the Daniel K Inouye Solar Telescope. The image reveals previously unseen plasma whirlpool-like patterns, identified as Kelvin-Helmholtz instabilities, which may explain the Sun's outer atmosphere temperature and magnetic energy dynamics.
Scientists using the NSF Daniel K. Inouye Solar Telescope discovered Kelvin-Helmholtz Instability (KHI) on the Sun's surface, appearing as small swirling patterns. This finding could explain the Sun's outer atmosphere heating and magnetic energy buildup, which fuels solar flares impacting Earth's technology.