Solar Flare Footprints Reveal Hidden Explosions on the Sun
A new study has found that solar flares, powerful explosions on the surface of the sun, release energy in bursts rather than smoothly. Researchers used flare ribbons, a type of plasma and high-energy particle that crash back into the sun, to study the energy release process. The study, published in The Astrophysical Journal, used data from the Interface Region Imaging Spectrograph (IRIS) satellite to analyze the behavior of flare ribbons during a medium-class solar flare on June 22, 2015.
The researchers, led by Marcel Corchado Albelo of the U.S. National Science Foundation, found that the flare ribbons broke into fragments of different sizes, releasing energy in bursts rather than evenly. This discovery challenges existing theories of flare-energy release and suggests that the energy release process is more complex than previously thought.
The study's lead author, Maria Kazachenko, a scientist at the National Solar Observatory, said that the measuring tool used in the study was adapted from a completely different field and showed that ribbon complexity rose along with the rate of reconnection. The study's findings have implications for understanding solar flares and their impact on Earth, including the potential for radio blackouts, disruptions to GPS and power grids, and aurorae.
The research is part of an ongoing effort to understand solar flaring and improve the models scientists use to predict these events. While the study does not predict when the next flare will strike, it provides valuable insights into the energy release process and the role of magnetic reconnection in solar flares.
