Scientists Spot a Solar Flare With Surprising Spectral Behavior
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On August 19, 2022, astronomers using the Daniel K. Inouye Solar Telescope (DKIST) on the Hawaiian island of Maui caught the fading remnants of a C-class solar flare. Their observations showed something unusual: very strong spectral fingerprints of calcium II H and hydrogen-epsilon lines. It was the first time these two light signatures were seen in great detail during a flare. According to computer models, those lines were stronger than expected and play a not well-understood role in how flares
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