Sunspots help to understand life around other stars

Studying stellar activity will also help explain the beginning of life on Earth 4 billion years ago.

New research Published in The Astrophysical Journal We have shown how sunspots (relatively cool and dark patches of the Sun) can help us better understand the state of life of exoplanets, which are planets outside the Sun.

Sunspots are a precursor to solar flares, so monitoring them can help you decipher how and why flares occur. On young stars, superflares occur almost daily, but on more mature stars such as the Sun, they can occur once every 1,000 years. Some flares may help build RNA and DNA on the planet, but too many strong flares can damage the atmosphere and make the planet uninhabitable.

High resolution data of the Sun from NASA’s Solar Dynamics Observatory and JAXA / NASA’s Hinode mission was used in the study.

The team studied different layers of the sun using 14 different wavelengths, including visible light, ultraviolet light (UV), and X-rays.

https://www.youtube.com/watch?v=QJc1G8Zuqo ​​8

Institute of Space and Astronautical Science The chief author and scientist of the Institute of Space and Astronautical Science, Makoto Toriumi, said, “I wanted to know what would happen if the sunspot region could not be solved with an image.” release. “So we used the Sun’s data as if it came from a distant star to have a better relationship between the physics of the Sun and the physics of the stars.”

Putting all this data together, the team created a plot called a light curve that shows how light changes as sunspots pass through the surface of revolution of the sun. It also shows what the passing sunspots would look like if they were many light years apart.

(Passing the sunspot. Credit: NASA / SDO / JAXA / NAOJ / Hinode)

“The Sun is our closest star. We can use solar observation satellites to resolve signatures on surfaces 100 miles wide,” said NASA, co-author of the study, in Greenbelt, Maryland. Vladimir Irapetian, an astrophysicist at the Goddard Space Flight Center, said. “Other stars may have only one pixel that displays the entire surface, so I wanted to create a template to decode the activity of other stars.”

Studying stellar activity will also help explain the beginning of life on Earth 4 billion years ago. Many scientists suggest that intense solar activity may be the trigger.

“So far, we’ve run the best scenario of seeing only one sunspot,” says Toriumi. “Next, I plan to do some numerical modeling to understand what happens when there are multiple sunspots.”

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