An international group of astronomers used data from the James Webb Space Telescope to report the discovery of the first confirmed galaxies to date.
In the work, which NASA noted has not yet been officially reviewed, scientists found that the light from these galaxies took more than 13.4 billion years to reach Earth, since the galaxies returned to less than 400 million years after the Big Bang.
Previous data from Webb provided candidates for infant galaxies and the targets obtained were confirmed by spectroscopic observations.
Those observations revealed specific features in the light emitted from faint galaxies.
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Observations using the JWST Advanced Extragalactic Program (JADES) observations in the area in and around the Hubble Ultra Deep Space Telescope.
Starting with the Near Infrared Camera telescope, or NIRCam, the JADES program has more than 10 days of mission time to observe the field in nine different infrared colors.
In the images, the smallest of galaxies can be distinguished by a factor of up to 14 in the light stretched across the spectrum.
NASA astronomers have searched for galaxies that are faintly visible in the infrared, but whose light abruptly shuts off during a crisis.
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The agency noted that the location of the gap in each galaxy’s spectrum was caused by the expansion of the universe.
Then, using the Near-Infrared Spectrograph instrument for three days, the team collected the light from 250 faint galaxies, studying the patterns in the spectrum of the atoms in each galaxy coming from a specific measure of each galaxy’s redshift and revealing its properties. gases and stars in those galaxies.
The four galaxies appeared unheard of early, at redshifts above 10, or when the universe was about 330 million years old.
“We found the first galaxy only 350 million years after the Big Bang, and we are completely confident about the fantastic distances,” co-author Brant Robertson, from the University of California Santa Cruz and a member of NIRCam. knowledge of the team, in chap. “It’s a special way to find these ancient galaxies in such stunningly beautiful images.”
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Next year, JADES will continue with a detailed study of another field, this one focused on the iconic Hubble Deep Field.
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