Solar Physics
Researchers have captured the first direct evidence of small-scale torsional Alfvén waves in the Sun's corona, potentially explaining its extreme heat. Using the Daniel K. Inouye Solar Telescope in Hawaii, the team observed these magnetic waves twisting through the solar atmosphere. The discovery, published on October 24 in Nature Astronomy, validates theories dating back to the 1940s.
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Researchers at the University of Hawaiʻi Institute for Astronomy have solved the mystery of why solar rain forms so quickly during solar flares. Their work reveals that changing elemental abundances, like iron, enable the rapid cooling of plasma in the Sun's corona. This breakthrough could enhance predictions of space weather impacts on Earth.