James Webb has already broken Hubble’s record for the most distant galaxy ever observed!

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 that James Webb Space Telescope he have Mirror bigger Hubble allowing him to see more and better of Hubble in’Infrared. But to get to Layers From light the oldest in Universe Both devices should use strong gravitational lenses.

As part of the Glass Watch campaign (Grism Lens-Amplified Survey of Space)they astrophysicists already usedgalaxy cluster Abell 2744 to see far, take advantage of its field gravity that deviates from the rays of light stars 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 to arXiv In which they announced that they had discovered in these images two really large and distant galaxies less than a billion years after the great explosion. 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 isastronomer Peter van Dokkum, Known for his work on the mystery of super-spreading galaxies. Remember that cosmologists are used to expressing the distance used by galaxies Milky Way With a parameter denoted ‘z’ which is a measure of its spectral redshift, the higher z, the higher galaxy far.

Peter van Dokkum explains it on his account Twitter : ” 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, whileUniverse He was only 2.5% of his current age. Preliminary conclusion, supported by work before a red shift 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 Morphology 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 . “.

The researchers’ paper states that the two galaxies actually contain about 10 .9 masses solar shapedstars. Remember that one kpc (kiloparsec) roughly corresponds to 3.260 light years.

Wanting to escape for the summer?

To celebrate the holidays as they should, discover Mag Futura at a preferential price of 15 euros instead of 19 euros, a 20% discount !

In the program of this issue: Diving into the heart of 4 scientific axes on the occasion of 2022, from the Earth to the Moon:

  • What mysteries does the moon still hide?
  • Will we soon be able to cure everything thanks to genes?
  • How do I feed the world without destroying it?
  • Can AI Really Get Smart?

What is Mag Futura?

  • Our first paper magazine with over 200 pages to make science accessible to as many people as possible
  • 4 key science questions For 2022, from Earth to Moon
  • home delivery*

* Delivery is carried out in France (excluding metropolitan France), Switzerland and Belgium.

Interested in what you just read?

Leave a Comment