“Bars solve the supply chain problem in galaxies,” Jogee said. It’s like going into a forest that nobody has ever gone into.”īars play an important role in galaxy evolution by funneling gas into the central regions, boosting star formation. “For this study, we are looking at a new regime where no one had used this kind of data or done this kind of quantitative analysis before,” said Yuchen “Kay” Guo, a graduate student who led the analysis, “so everything is new. In an article accepted for publication in The Astrophysical Journal Letters, they highlight these two galaxies and show examples of four other barred galaxies from more than 8 billion years ago. ![]() The team identified another barred galaxy, EGS-24268, also from about 11 billion years ago, which makes two barred galaxies existing farther back in time than any previously discovered. “The bars hardly visible in Hubble data just popped out in the JWST image, showing the tremendous power of JWST to see the underlying structure in galaxies,” she said, describing data from the Cosmic Evolution Early Release Science Survey (CEERS), led by UT Austin professor, Steven Finkelstein. ![]() “I took one look at these data, and I said, ‘We are dropping everything else!’” said Shardha Jogee, professor of astronomy at The University of Texas at Austin. In a Hubble image, one galaxy, EGS-23205, is little more than a disk-shaped smudge, but in the corresponding JWST image taken this past summer, it’s a beautiful spiral galaxy with a clear stellar bar. ![]() Prior to JWST, images from the Hubble Space Telescope had never detected bars at such young epochs. The finding of so-called barred galaxies, similar to our Milky Way, this early in the universe will require scientists to refine their theories of galaxy evolution. AUSTIN, Texas - New images from NASA’s James Webb Space Telescope (JWST) reveal for the first time galaxies with stellar bars - elongated features of stars stretching from the centers of galaxies into their outer disks - at a time when the universe was a mere 25% of its present age.
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