JWST breaks report for many distant galaxy recognized thus far

James Webb Space Telescope discovers most distant galaxy ever, formed about 325 million years after the Big Bang

go through Leah Crane

The James Webb Space Telescope (JWST) discovered most distant galaxy Once confirmed. While it has seen many galaxies that look very far away, these are the first to have evidence that they are as far away as they appear.

Astronomers use a method called redshift. Due to the expansion of the universe, the farther an object is from Earth, the faster it is moving away from us. Similar to the Doppler effect, where the pitch of a sound seems to rise or fall as it moves toward or away from the listener, the redder the light from the galaxy is, the faster it moves away. By comparing calculations of how red a galaxy looks to its actual color, astronomers can determine how far away a galaxy actually is.

exist Early Observations of Galaxies by JWST, astronomers can only make approximate estimates of each galaxy’s redshift because they don’t have detailed data on the spectrum of light from those galaxies. The observations provide clues to galaxies at redshifts of 12 and above, meaning they appear to be more than 30 million light-years away and likely formed within 400 million years of the Big Bang — but many scientists are skeptical of the findings attitude because of the lack of precise confirmation.

“Proving that these galaxies did exist in the early universe is crucial,” he said. Emma Curtis-Lake University of Hertfordshire NASA blog post“There is a good chance that galaxies that are closer can masquerade as distant galaxies.”

Now, as part of the JWST Advanced Extragalactic Deep Survey (JADES), researchers have identified four poles distant galaxy, ranging from approximately 10.4 to 13.2. That means they formed between 325 million and 450 million years after the Big Bang. The previously confirmed highest redshift record was around 11.

“These are the faintest infrared spectra ever captured,” said Stefano Cagnani Scuola Normale Superiore in Italy. The observations lasted 3 days and 28 hours, covering a total of 250 dark galaxies, and another set of observations is planned for 2023.More of these distant galaxies are expected to be identified, which will give us a glimpse into the early and How the most distant galaxies are different Those from near our universe.

refer to: arxiv.org/abs/2212.04480

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