THE galaxy more old of Universe was detected by an international team of astronomers using data from the James Webb Space Telescope (JWST), Nasa🇧🇷 It dates from less than 400 million years after the Big Bang and its light took more than 13.4 billion years to reach us, researchers say.
According to the US space agency, previous information collected by the equipment has provided clues to early galaxies. Now those targets have been confirmed by obtaining spectroscopic observations, revealing characteristic patterns in the fingerprints of light from the locations.
“It was crucial to prove that these galaxies, in fact, inhabit the early Universe. It is very possible that nearby galaxies will pass themselves off as very distant galaxies,” said astronomer and co-author Emma Curtis-Lake from the University of Hertfordshire in the UK. “To see the spectrum unfold as expected, confirming that these galaxies are at the edge of our field of view, some farther away than Hubble could see. This is a hugely exciting achievement for the mission.
The Science Alert portal notes that being able to peer into the oldest universe was one of the greatest hopes placed in the JWST, after all, human understanding of the first billion years after the Big Bang is extremely limited, and finding Older and older objects can help shed light on this crucial moment in galaxy formation.
Currently, there are models that describe how events unfolded after the big bang that formed the Universe. As the report reports, it is believed that before the birth of the first stars, the Universe was full of opaque matter, particles that gradually combined to form neutral hydrogen.
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When the stars started to form, they ionized the hydrogen and the light shone. This process was completed about 1 billion years after the creation of the Universe.
“The light from these objects is very faint, having traveled so far. And, due to the expansion of the Universe, it has been greatly stretched towards the longer, redder end of the spectrum, a phenomenon known under the name of redshift.” Scientific alert🇧🇷
JWST is the most powerful telescope ever launched into space and specializes in infrared and near infrared light – designed to detect this red-shifted light to the best of our ability. To obtain a reliable redshift, light must be split into its constituent wavelengths, a technique known as spectroscopy.
In the case of the current discovery, a team of researchers split the telescope’s NIRCam light into nine wavelength bands, focusing on four galaxies with high redshifts, two of which have been identified for the first time. by Hubble.
The new data confirms that these two galaxies are indeed among the most distant yet detected – those spotted by Hubble have redshifts of 10.38 and 11.58, and the JWST findings of 12.63 and 13.20 . Other candidates with higher redshifts are currently under investigation but have yet to be confirmed.
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