A new NASA video showcases a whirring symphony of stars in our space region.
Although he usually hunts for alien worlds, or exoplanets in the neighboring universe, one NASA mission is also capable of measuring vibrations produced by giant celestial bodies known as red giant stars…
IN Transiting satellite for exoplanet research (TESS), which launched in April 2018, is designed to search for exoplanets. The method he uses to find these worlds is called the transit method, and it involves examining nearby stars and waiting to see if their brightness has dropped at all. These dips are caused by the passage of a planetary body in front of a star from our point of view in space.
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Since TESS is already ready to observe the changes in stars caused by the rotation of exoplanets, it was also able to detect oscillations in the bodies of red giants.
“Our initial result, based on measurements of stars in TESS’s first two years of operation, shows that we can determine the masses and sizes of these oscillating giants with an accuracy that will only improve as TESS continues,” said Mark Hon, a NASA Hubble Scientist. in university. Hawaii to Honolulu, which presented a new study this week during the second TESS science conference. Hon commented in NASA Statement Aug 4 about a new job.
According to NASA, a star wobbles as the gas it contains heats up, rises, then cools and descends. These impulses can be converted into sound waves.
Just as a person can have their eyes closed, but at the same time they are aware that the sound of two similar types of instruments makes different sounds, such as violin and cello, astronomers can use these stellar waves to determine the composition and size of red giants, unlike others. kinds of stars and to each other.
This branch of astronomy, dubbed asterseismology, “can help determine the fundamental properties of a large number of stars with an accuracy unattainable in any other way,” NASA said in a statement.
The team tuned TESS’s mission to find something new by teaching a computer using machine learning how to make pattern-based decisions. In this case, artificial intelligence allowed a computer to hone red giant stars in a sample of TESS stellar data.
When the explorers completed this first phase, they mapped the distances to these more than 150,000 red giants. Then they turned to Mission Gaia… Gaia is the European Space Agency (ESA) telescope that provides the most detailed picture of the Milky Way galaxy.
Astronomers believe that large red giants should be located closer to the plane of the Earth. Milky Way… So Hon’s team combined their findings with Gaia’s mission.
“Our map empirically demonstrates for the first time that this is true for almost the entire sky,” co-author Daniel Huber, assistant professor of astronomy at the University of Hawaii, said in a statement to NASA. “With Gaia’s help, TESS has provided us with tickets for the Red Giants Concert in the Sky.”
New job that appeared on the arXiv.org preprint server, was accepted for publication in The Astrophysical Journal.
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