A new “coronal adaptive optics” system has been developed by astronomers at the NSF’s National Solar Observatory and New Jersey Institute of Technology to generate high-resolution images and films by eliminating atmospheric blurring.
This image captures a 16-minute time-lapse film that illustrates the formation and collapse of a complex plasma stream measuring approximately 100 km per 100 km in front of a coronal loop system. This marks the first observation of such flows, referred to as plasmoids, raising questions about the dynamics involved. The image, taken by a Good Solar Telescope at Big Bear Solar Observatory with the new coronal adaptive optics system CONA, showcases hydrogen α light emitted by the solar plasma. While the image is artificially colored, it reflects the real color of hydrogen alpha light, with darker colors indicating bright light. Image credit: Schmidt et al. /njit /nso /aura /nsf.
The solar corona represents the outermost layer of the solar atmosphere, visible only during a total solar eclipse.
Astronomers have long been fascinated by its extreme temperatures, violent eruptions, and notable prominence.
However, Earth’s atmospheric turbulence has historically caused blurred images, obstructing the observation of the corona.
“Atmospheric turbulence, similar to the sun’s own dynamics, significantly degrades the clarity of celestial observations through telescopes. Fortunately, we have solutions,” stated Dr. Dark Schmidt, an adaptive optics scientist at the National Solar Observatory.
CONA, the adaptive optics system responsible for these advancements, corrects the atmospheric blurring affecting image quality.
This cutting-edge technology was funded by the NSF and implemented at the 1.6-meter Good Solar Telescope (GST) located at Big Bear Solar Observatory in California.
“Adaptive optics function similarly to autofocus and optical image stabilization technologies found in smartphone cameras, fixing atmospheric distortions rather than issues related to user instability,” explained Dr. Nicholas Golsix, optical engineer and lead observer at Big Bear Solar Observatory.
https://www.youtube.com/watch?v=pzsn39nigg0
Among the team’s remarkable discoveries are films showcasing a significant reconstruction of the sun, revealing subtle turbulent internal flows.
The Sun’s structure presents as a prominent bright feature, often illustrated by arches and loops that extend from its surface.
https://www.youtube.com/watch?v=GZ10DLB2pp94
The second film depicts the rapid creation and collapse of a finely detailed plasma stream.
“These observations are the most detailed of their kind, highlighting features that were previously unobserved, and their nature remains unclear,” remarked Vasyl Yurchyshyn, a professor at the New Jersey Institute of Technology.
“Creating an instrument that allows us to view the sun like never before is incredibly exciting,” Dr. Schmidt commented.
https://www.youtube.com/watch?v=t1wrkychpru
The third film illustrates the delicate chains of coronal rain, a phenomenon wherein cooled plasma condenses and falls back towards the sun’s surface.
“Coronal rain droplets can measure less than 20 km in width,” noted Dr. Thomas Shadd, an astronomer at the National Solar Observatory.
“These discoveries provide vital observational insights that are crucial for validating computer models of coronal phenomena.”
https://www.youtube.com/watch?v=ydst2wvx3de
Another film captures the dynamic movements across the solar surface, influenced by solar magnetism.
“The new Collar Adaptive Optical System closes the gap from decades past, delivering images of coronal features with resolution down to 63 km. This is the theoretical limit achievable with the 1.6 m Good Solar Telescope,” Dr. Schmidt stated.
“This technological leap is transformative. Discoveries await as we improve resolution tenfold,” he emphasized.
The team’s findings are detailed in a published paper in today’s issue of Nature Astronomy.
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D. Schmidt et al. Observation of fine coronal structures with higher order solar adaptive optics. Nature Astronomy Published online on May 27, 2025. doi:10.1038/s41550-025-02564-0
Source: www.sci.news
