![sun corona. sun corona.](https://www.nasa.gov/sites/default/files/images/723555main_erupting-sun.jpg)
It indicates that the leading ideas for how to model the formation of the solar wind are not complete, and so our ability to predict and defend against space weather can be improved,” Boe said.During its many close flybys, the Probe dipped beneath 15 solar radii (around 6.5 million miles) from the Sun’s surface and transisted a feature in the corona called a pseudostreamer. “These results are of particular interest for solar wind formation. This work has further implications in other areas of solar research-including the formation of the solar wind, which impacts the Earth’s magnetic field and can have effects on the ground, such as power outages. During periods of maximum solar activity, the coronal magnetic field was far less organized and more radial. An illustration of the Sun’s corona magnetic field.ĭuring periods of minimum solar activity, the corona’s field emanated almost straight out of the Sun near the equator and poles, while it came out at a variety of angles at mid-latitudes. To quantify these changes, Boe measured the magnetic field angle relative to the Sun’s surface. Higher resolution images showed smaller-scale structures, implying that the corona is even more structured than what was previously reported. This data provided the chance to study changes in the corona over two 11-year magnetic cycles of the Sun.īoe found that there were very fine-scale structures throughout the corona. “I knew it would be possible to extract a lot more information by applying modern image processing techniques to solar eclipse data.”īoe traced the pattern of the distribution of magnetic field lines in the corona, using an automatic tracing method applied to images of the corona taken during 14 eclipses the past two decades. “The corona has been observed with total solar eclipses for well over a century, but never before had eclipse images been used to quantify its magnetic field structure,” explained Boe. These observations have led to breakthroughs in unveiling some of the secrets of the physical processes defining the corona. Habbal has led a group of eclipse chasers, the Solar Wind Sherpas, making scientific observations during solar eclipses for more than 20 years. Top panels show the visible light (color inverted), lower panels show the magnetic field shape.īoe was advised by UH Mānoa Astronomy Professor Shadia Habbal, a coronal research expert. High-resolution images of the solar corona.
![sun corona. sun corona.](https://static.scientificamerican.com/sciam/cache/file/1304CC00-A779-4ECD-8692BCA120489F57.jpg)
More on Habbal’s research: ‘Eclipse Chaser’ children’s book features UH astronomer, January 21, 2020.The results were published in the Astrophysical Journal on June 3. IfA graduate student Benjamin Boe conducted a new study that used total solar eclipse observations to measure the shape of the coronal magnetic field with higher spatial resolution and over a larger area than ever before. The properties of the solar corona are a consequence of the sun’s complex magnetic field, which is produced in the solar interior and extends outward into space. Researchers at the University of Hawaiʻi Institute for Astronomy ( IfA) have been hard at work studying the solar corona, the outermost atmosphere of the sun that expands into interplanetary space. White-light images of the solar corona during the 2019 total solar eclipses in Chile.