We know that thehas a larger than that of which allows him to see further and better than in L’ . But to have access to oldest light of observable, both instruments must use strong gravitational lenses.
As part of the Glass observation campaign ()them had already used the Abell 2744 to see far, taking advantage of its field of which deviates the light rays from in the background, like the lens of a magnifying glass.
As this video shows, Hubble was already making gravitational lensing observations for the galaxy cluster Abell 2744. © Nasa, ESA, and J. Lotz, M. Mountain, A. Koekemoer, and the HFF Team ( STScI)
Quite naturally, the members of Glass put their experience with Hubble at the service of the scientific community using the James-Webb and they therefore provided images that could be used by their colleagues.
These have just deposited an article onin which they announce that they have discovered in these images two distant and already massive galaxies less than a billion years after the . One of them, called Glass-z13, would even be the oldest known to members of the noosphere who would observe it today only between 300 and 400 million years after the Big Bang, which would break a record. previously owned by Hubble.
Large galaxies with already billions of stars
Among the members of the team that made the discovery of Glass-z13 is thePieter van Dokkum, . Let us recall that cosmologists are used to expressing a distance for galaxies from the Milky Way by means of a parameter denoted “z” and which is a measure of their spectral shift towards the red, the higher z, the greater the galaxy is far away.
Pieter van Dokkum explains on his account: “ Here are the first results on the first luminous galaxies in the cosmos delivered by the JWST! Rohan Naidu and Pascal Oesch discovered two relatively bright galaxies in the first data broadcast at z=11-13, while the was only 2.5% of his current age. The tentative conclusion, supported by work prior to a slightly lower, is that massive galaxy formation started early – which is good news for the prospects of finding things at even earlier times with the JWST! The data is of such quality that it is even possible to measure the of these extremely distant galaxies. The larger of the two is clearly resolved; it has an exponential profile with a radius of 0.7 kpc “.
First results on luminous early galaxies from JWST! @Rohan_Naidu and Pascal Oesch find two relatively bright galaxies in early release data at z=11-12, when the universe was only 2.5% of its present age: https://t.co/zmEcZIZCrr
— Pieter van Dokkum (@DokkumPieter) July 20, 2022
The researchers’ paper states that the two galaxies already appear to contain about 109 Stacy McGaugh, the astrophysicist and cosmologist well known for her work on and who studies , .solar in the form of . Remember that one kpc (kiloparsec) roughly corresponds to 3.260 . Remarkably,
For those watching the astro community freak out about bright, high redshift galaxies being detected by JWST, some historical context in an amusing anecdote…
—Stacy (@DudeDarkmatter) July 20, 2022
We can also consult, although it is more technical, the explanations of Rohan Naidu on Twitter.
Paper day! “Two Remarkably Luminous Galaxy Candidates at z~11-13 Revealed by the Just Wonderful Space Telescope”. These galaxies potentially push our cosmic frontier to only ~300 million years after the Big Bang!!! ????and behind the scenes notes pic.twitter.com/eS79MXcGNq
—Rohan Naidu (@Rohan_Naidu) July 21, 2022