Scientists capture first images of plasma vortices on Sun's surface

For the first time, scientists have captured unprecedentedly detailed images of minuscule plasma vortices swirling on the Sun's surface. These phenomena, observed using the powerful Daniel K. Inouye Solar Telescope in Hawaii, offer critical insights into the mechanisms driving solar flares and extreme space weather events.

The international research team, from the U.S. National Solar Observatory and Germany's Max Planck Institute for Solar System Research, identified dozens of these plasma whirlpools. The images reveal structures as small as approximately 19 kilometers in spatial resolution, a level of detail previously unattainable. These vortices, ranging from 25 to 175 kilometers in size, occur at the edges of "granules" – convective cells on the Sun's surface – particularly near sunspots.

Researchers attribute the formation of these vortices to the Kelvin-Helmholtz instability, a physical process where two fluids moving at different speeds interact, creating wave-like patterns. This phenomenon is commonly observed in everyday situations, such as when cream mixes into coffee. The plasma vortices move at speeds between 0.67 and 3.0 km per second.

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If the magnetic field is strong enough anywhere, vortices seem to be constantly generated, suggesting they could be the driving force behind the twisting of magnetic field lines.

This discovery is significant because these vortices are believed to be the "engine" behind solar explosions. They continuously churn and twist magnetic field lines on the Sun's surface. When these twisted lines eventually snap and reconnect, they release vast amounts of plasma and radiation into space, leading to solar flares and coronal mass ejections (CMEs). These eruptions can have severe consequences for Earth, disrupting satellite communications, power grids, and radio transmissions.

The findings, published in the journal Nature, also shed light on the "coronal heating" problem – why the Sun's outer atmosphere, the corona, is hundreds of times hotter than its surface. The constant mixing of plasma by these vortices may play a role in transferring heat outwards. This breakthrough provides essential data for improving the prediction of space weather and mitigating its potential impacts on our planet.

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This discovery provides crucial data for understanding 'space weather' and its potential impact on Earth, including communication disruptions and power grid failures.