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Space.Fan — Go Beyond
ApJ · 23 HR AGO
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Astronomers Uncover Secrets of Spinning Disks Around Special Stars

By Space.Fan Editorial Desk

New research shows how we can use light patterns to weigh the hidden disks of gas surrounding certain types of stars.

Earth seen from space with sunlight breaking over the horizon.
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The Drop

Scientists have been studying a group of s called Classical Ae s. These s are similar to our own sun but are much younger and hotter. They are unique because they are surrounded by spinning disks made of gas. Even though these disks do not have dust, they act like a swirling ring around the . For a long time, it has been hard to tell exactly how much gas is in these rings or how they are tilted from our view on Earth. To solve this mystery, researchers looked at data from a massive project called the LAMOST survey. This project used a large telescope in China to capture the light signatures of 159 different s. By carefully studying the light coming from hydrogen gas, known as H-alpha, the team realized they could read the signals like a fingerprint. These patterns reveal the weight of the disk and how it is tipped compared to how we see it. A small number of these s also gave off signals from calcium atoms. When researchers saw this, they found that these specific s usually had much heavier gas disks than the others. This helps link the behavior of these s to older, more well-known types of s called Classical Be s, showing they might be part of the same family.
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Why It Matters

Understanding these gas disks is important because it shows how s grow and interact with their surroundings. By proving that low-resolution light data can accurately weigh these disks, scientists now have a way to study thousands of s that were previously too difficult to analyze. This opens the door to comparing many different groups to see how they evolve over time.
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The Catch

While the results are strong, some of the findings might be influenced by how the s were chosen for the study. For example, the team noticed that certain types seemed to have more massive disks, but this could be a result of how the survey picked which s to look at rather than a rule of nature. Also, the models used to explain the data are based on our best current theories, but they are still simplifications of complex space environments.

Put That in Perspective

Scientists have studied similar, hotter stars for years, but this discovery helps confirm that the same rules of physics apply to this specific group of cooler stars. Researchers will likely use these new methods to look at larger catalogs of stars to see if these disk patterns hold true across the whole galaxy.

Source October 2, 2026
R. Anusha, T. A. A. Sigut
The University of Western Ontario·The Astrophysical Journal·10.3847/1538-4357/ae9eb5

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