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The James Webb Telescope reaches a new milestone

The James Webb Telescope reaches a new milestone

The team searched for the faintest galaxies that appear in the infrared

©: NASA, ESA, CSA and M. Zamani (ESA/Webb)

An international search team has spaces 4 particularly early galaxies Spectrum confirmed. These galaxies were previously associated with James Webb Space Telescope Discover. The light of these galaxies has ended 13.4 billion years required to reach the ground. It dates from less than 400 million years after the Big Bang, compared to the universe 2 percent He reached his current age.

According to NASA They were using a spectrometer NIR On board the telescope now redshifts measured for each galaxy. To clarify: on its way to Earth, light turns red and finally into infrared due to the expansion of the universe. The measured value is also a measure of the galaxy’s age. New record holder Jades-GS-z13-0 with a value of z = 13.2 0 found to be less than 400 million years After the Big Bang, as the data show. The galaxy has already held GNz11 with a z-value = 10.96, discovered in 2016.

Multiple and larger galaxies

“It was necessary to prove that these galaxies did indeed inhabit the entire early universe,” says the astronomer and co-author of the study. Lake Emma Curtis from the British University of Hertfordshire. “Seeing the spectrum as we had hoped confirms that these galaxies are at the true edge of our view, and some are farther away than Hubble can see! A very exciting feat of the mission,” she adds.

Star formation must have happened before the birth of galaxies – approx 100 million years Before. The first stars should do it 225 million years Formed after the Big Bang, eg Brant Robertson Manal University of California, Santa Cruz explained. Overall, James Webb’s data indicates that there are more and more galaxies than would be expected in the young universe in particular. Why this was not clear at the moment, but it could be related to the effects of dark matter. Star formation in the young universe could also have happened differently than it does today.

The values ​​must be verified

In total, the researchers collected the light from 250 faint galaxies. The research group consisted of astronomers who were involved in developing the two instruments aboard Webb. This is the NIRCam Near Infrared Camera and the NIRSpec Near Infrared Spectrometer.

The measurement should now be checked.

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