The James Webb Space Telescope would see it when the visible universe was only 300 to 400 million years old after the Big Bang. It is called Glass-z13 and was observed through a known gravitational lens, so it will be the oldest galaxy known to date, surpassing the record held by the Hubble telescope.
We know thathe have bigger allowing him to see more and better of in’ . But to get to From the oldest in Both devices should use strong gravitational lenses.
As part of the Glass Watch campaign ()they already used Abell 2744 to see far, take advantage of its field that deviates from the rays of light In the background, like a magnifying glass.
As this video demonstrates, Hubble has already made gravitational lensing observations of the Abell 2744 galaxy cluster. For a fairly accurate French translation, click on the white rectangle at the bottom right. The English translation should then appear. Then click on the nut to the right of the rectangle, then click on “Subtitles” and finally on “Translate automatically”. Choose “French”. ©
Naturally, the Glass members put their experience with Hubble at the service of the scientific community using James-Webb, thus providing images that their colleagues could use.
I just uploaded this article toIn which they announced that they had discovered in these images two really large and distant galaxies less than a billion years after . One of them, called Glass-z13, will be the oldest known to members of the noosphere who will observe it today only 300 and 400 million years after the Big Bang, and which would break a record, previously held by Hubble.
Big galaxies already have billions of stars
Among the team that discovered Glass-z13 isPeter van Dokkum, . Remember that cosmologists are used to expressing the distance used by galaxies With a parameter denoted ‘z’ which is a measure of its spectral redshift, the higher z, the higher far.
Peter van Dokkum explains it on his account: ” Here are the first results on the first luminous galaxies in the universe provided by JWST! Rohan Naidoo and Pascal Ochs discovered two relatively bright galaxies in the first data transmission at z = 11-13, while He was only 2.5% of his current age. Preliminary conclusion, supported by work before a A little lower, did the massive galaxy formation start early – good news for the prospects of finding objects in earlier times with JWST! The data is of such high quality that it can be measured From these very distant galaxies. The greater of the two was clearly resolved; It has an exponential profile with a radius of 0.7 k . “.
First results on early luminous galaxies from JWST! Tweet embed Pascal Auch found two relatively bright galaxies in the early launch data at z = 11-12, when the universe was only 2.5% of its current age: https://t.co/zmEcZIZCrr
– Peter van Dokkum (@DokkumPieter) 20 July 2022
The researchers’ paper states that the two galaxies actually contain about 10 .9solar shaped . Remember that one kpc (kiloparsec) roughly corresponds to 3.260 .