For the first time, new photos from James Webb Space Telescope The star-lined galaxies were detected at a time when the universe was a quarter of its current age.
Starbars are elongated features of stars that extend from the centers of galaxies to their outer disks. They transport gas to the central regions, which promotes star formation.
In a statement from the University of Texas, she said that discovering barred galaxies would require scientists to adjust their theories about galaxy evolution, and noted that the Hubble Space Telescope has never detected bars at such young ages.
For example, while the galaxy EGS-23205 appears blurry in the Hubble image, Webb’s image is sharper, revealing a clear stellar spiral galaxy.
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JWST’s ability to map galaxies at higher resolutions and at longer infrared wavelengths allows the Hubble Telescope to peer through dust and reveal the underlying structure and mass of distant galaxies. This can be seen in these two images of the galaxy EGS23205, which were observed about 11 billion years ago. In the HST image (left, captured in the near infrared filter), the galaxy is little more than a disk-shaped ball obscured by dust and affected by the brightness of young stars, but in the corresponding JWST infrared image (captured last summer), it is A beautiful spiral with a translucent starburst.
(Credit: NASA/CEERS/The University of Texas at Austin)
The James Webb Space Telescope has a larger mirror, which gives it greater light-gathering capabilities and allows it to see farther with greater resolution.
as notes Infrared wavelengths are longer than that of the Hubble TelescopeHe can also see better through the dust.
“I took one look at this data and said, ‘We’re throwing away everything else!’” (CEERS) survey.
Dave Chaney, principal optical test engineer at Ball Aerospace, inspects six primary mirror segments, critical elements of NASA’s James Webb Space Telescope, prior to testing at the X-ray Cooling and Refrigeration Facility at NASA’s Marshall Space Flight Center in Huntsville, Alabama.
(Credit: NASA/MSFC/David Higginbotham)
Another galaxy, EGS-24268, is also about 11 billion years old – making two forbidding galaxies much older in time than previously detected.
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The international group of researchers highlighted these galaxies and showed examples of four others from more than 8 billion years ago in an article in Astrophysical Journal Letters.
A montage of JWST images shows six examples of barred galaxies, two of which represent the longest identified and characterized recovery times to date. Labels in the upper left corner of each number show each galaxy’s regression time, which ranges from 8.4 to 11 billion years ago (Gyr), when the universe was only 40% to 20% of its current age.
(Credit: NASA/CEERS/The University of Texas at Austin)
Two graduate students played an important visual role Navigate hundreds of galaxies And look for those that can be analyzed with a more rigorous mathematical approach.
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The bars also help with shaping supermassive black holes In the centers of galaxies, gas directs part of the way.
The existence of these rods defies theoretical models, the university said, and the team will test different models in additional work.
“This early detection of rods means that models of galactic evolution now have a new path through the rods to accelerate the production of new stars at early ages,” Jogee said.
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