We know thathas a bigger than which allows him to see further and better than in L’ . But to have access to of the oldest in observables, both instruments must use strong gravitational lensing.
As part of the Glass Observation campaign ()them had already used the galaxy cluster Abell 2744 to see far and exploited its field which deviates the light rays from in the background, like the lens of a magnifying glass.
As this video shows, Hubble already made gravitational lensing observations of 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 to the service of the scientific community with the help of James-Webb, providing images that could be used by their colleagues.
These have just deposited an article onwhere they announce that in these images they have discovered two distant and already massive galaxies less than a billion years later . 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 held by Hubble.
Large galaxies with already billions of stars
Among the members of the team that made the discovery of Glass-z13 arePieter van Dokkum, . Remember that cosmologists are used to expressing a distance for galaxies using using a parameter denoted “z” which is a measure of their spectral redshift, the higher z the larger is distant.
Pieter van Dokkum explains on his account: ” Here are the first results about the first luminous galaxies in the cosmos provided by JWST! Rohan Naidu and Pascal Oesch discovered two relatively bright galaxies in the first data broadcast at z=11-13, while was only 2.5% of its current age. The preliminary conclusion, supported by work prior to a slightly lower, the massive galaxy formation started early – which is good news for the prospects of finding things at even earlier times with JWST! The data is of such a quality that it is even possible to measure 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 finds two relatively bright galaxies in early release data at z=11-12 when the universe was only 2.5% of its current age: https://t.co/zmEcZIZCrr
— Pieter van Dokkum (@DokkumPieter) 20 July 2022
The researchers’ paper says the two galaxies already appear to contain about 109 Stacy McGaugh, the astrophysicist and cosmologist known for his work with and who is studying , .sun in the form of . Remember that one kpc (kiloparsec) roughly corresponds to 3,260 light years. Remarkable,
For those watching the astro community freak out over bright, high-redshift galaxies being discovered by JWST, some historical context in an amusing anecdote…
— Stacy (@DudeDarkmatter) 20 July 2022
We can also consult, although it is more technical, the explanations of Rohan Naidu on Twitter.
Paper Day! “Two Remarkably Bright Galaxy Candidates at z~11-13 Revealed by the Just Wonderful Space Telescope”. These galaxies potentially push our cosmic limit to only ~300 million years after the Big Bang!!! https://t.co/4aAP0nKhpz ????and behind the scenes notes pic.twitter.com/eS79MXcGNq
—Rohan Naidu (@Rohan_Naidu) July 21, 2022