Astronomers use advanced instruments to calculate A more accurate age of the Maisie Galaxy, as discovered by the James Webb Space Telescope (JWST) in June 2022. Although the system is not as old as initial estimates, it is still one of the oldest recorded galaxies at 390 million years old. Big Bang — About 13.4 billion years old.it is only 70 million years younger than JADES-GS-z13-0the (currently) oldest known system.
A team led by astronomer Stephen Finkelstein of the University of Texas at Austin discovered The system was introduced last summer. (The name “Maisie’s Galaxy” is a tribute to her daughter, as she discovered it on her birthday.) The group originally estimated it to be only 290 million years after the Big Bang, but it’s more advanced. An analysis of the galaxy using modern instruments revealed that it is about 100 years old. million years older than that. “The interesting thing about Maisie’s galaxy is that it was one of the first distant galaxies identified by his JWST, and the first galaxy in that group to actually be spectroscopically identified. There is,” Finkelstein said.
Spectroscopic confirmation was courtesy of JWST’s Near Infrared Spectrometer (NIRSpec) conducted by the Space Evolutionary Early Emission Sciences Survey (CEERS). NIRSpec “splits an object’s light into many different narrow frequencies to more accurately identify its chemical composition, heat output, intrinsic brightness, and relative motion.” Redshift (from observer The movement of light to longer (redder) wavelengths, indicating receding motion, was key to more accurate dating than the original estimate based on photometry. Sophisticated tools assigned Maisie’s galaxy a z=11.4 redshift and helped the researchers establish a revised estimate of 390 million years after the Big Bang.
Astronomers also looked at CEERS-93316, originally a galaxy Estimate It will be 235 million years before the Big Bang, or surprisingly old. A study of this system reveals a redshift of z=4.9, located only 1 billion years after the Big Bang. The initial false assumption about CEERS-93316 was understandable. The galaxy emitted an unusual amount of light in a narrow band of frequencies associated with oxygen and hydrogen, making it appear bluer than it actually is.
Finkelstein blames the failure on bad luck. “It was kind of a strange incident,” he said. “Of the dozens of high-redshift candidates observed spectroscopically, this is the only instance where the true redshift is much smaller than our original guess,” Finkelstein added. “It would have been very difficult to explain how the universe could have created such a massive galaxy so quickly. So this is probably the most likely of all times.” I think it was the result, because it was so extreme, so bright, so obviously high redshift.”
The CEERS team is currently evaluating about 10 more systems that may be older than Maisie’s galaxy.