A team of astrophysicists at the University of Warwick in the U.K., working with colleagues from the Max Planck Institute for Solar System Research, Northumbria University and the Royal Observatory of Belgium has taken what might amount to another step closer to understanding why the sun's corona is so hot. In their study, reported in the journal Nature Communications, the group analyzed data from two sources of solar information.
A team of astrophysicists at the University of Warwick in the U.K., working with colleagues from the Max Planck Institute for Solar System Research, Northumbria University and the Royal Observatory of Belgium has taken what might amount to another step closer to understanding why the sun's corona is so hot. In their study, reported in the journalThe sun's corona is the outermost part of its atmosphere—prior research has suggested that it is thousands of times hotter than the interior.
The work by the group involved studying data collected by ESA's Solar Orbiter and NASA's Solar Dynamics Observatory. Both sources offered data regarding the plasma that makes up most of the corona, including its loops. Loops are arch-like structures that are made of very dense plasma that separates them from the rest of the corona. They begin and end at foot points on the photosphere. In analyzing data for the loops, the research team found never-before-observed kink oscillations.
The researchers then took a closer look, measuring characteristics of the oscillations and their rate of decay. Things that oscillate, they note, must either decay and eventually stop, or have ansource that keeps them moving. In studying the kink oscillations, the research team found that they did not decay, suggesting that there is some sort of energy source keeping them going.
The researchers further suggest that whatever that energy source might be, it is not random—it must be intrinsic. They theorize that the same source of energy is likely responsible for the
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