The James Webb Telescope has just discovered the smallest galaxy outside the Milky Way, as well as a never before discovered giant star..
In the research article published above arXivscientists from the University of Cantabria (Spain) have discovered 28 previously undiscovered galaxies, including The smallest galaxy outside the local cluster that humans have ever discovered.
The El Gordo galaxy serves as a giant lens, helping to see the galaxies behind.
The El Gordo galaxy is used as a giant lens, allowing us to see the galaxies behind it. (Photo: NASA).
To observe the galaxy, scientists collected data from the James Webb Telescope, using the most massive galaxy cluster known, called The big Make giant lentils.
El Gordo was first discovered in 2011. Calculations show the galaxy has a mass 3 million billion times that of the Sun, reaching the limit of the standard theory of the universe.
Thanks to their enormous mass, galaxies can be used as gravitational lenses with the ability to bend and amplify the light of stars and galaxies behind them, objects that we cannot normally see.
Based on infrared light data from El Gordo, scientists have discovered dozens of new galaxies. Among them is a dwarf galaxy discovered from strange fluctuations of light coming from another galaxy, named The skinny.
Through El Gordo the light of the galaxy stretches in an arc. “The only way to explain the above phenomenon is that it is a small galaxy, perhaps a dwarf galaxy”Diego said.
The mass of the galaxy above would be 1,000 times smaller than that of the Milky Way. If the data is confirmed, that would be it the smallest galaxy was observed beyond clocal galaxyincluding the Milky Way and a number of neighboring galaxies.
Diego said that if confirmed, the galaxy could lie outside of some current physical models. “In fact, you may notice that this galaxy doesn’t fit some models of dark matter, suggesting that dark matter can withstand high temperatures. Dark matter at high temperatures would have too high a speed to form a small galaxy like this. »Diego shared.
The golden mirrors of James Webb.
James Webb’s gold-plated mirrors. (Photo: NASA).
Theo NewScientistDiego and his colleagues also discovered one red giant star, type of star never before seen outside the local galaxy cluster, identified using James Webb’s infrared sensor.
If stars of a similar red color are discovered, scientists could use them to estimate the distance of distant objects and calculate the expansion of the universe.
Currently, scientists use it supernova – the process of the end of the life cycle of an old star – to calculate. However, the above method does not always give accurate results.
James Webb was launched in December 2021 and is officially operational from July this year after calibration. It is the successor to the Hubble telescope, used to detect ancient stars and galaxies, thus helping to understand the history of the formation of the universe. Modern tools help James Webb collect more details than Hubble.
University of Illinois researcher Felipe Menanteau appreciated the discovery of distant dwarf galaxies and red giant stars outside the local cluster. However, in essence, more data is still needed to contribute to the spatial history research model.
Article source: Zing
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New James Webb telescope discovers smallest galaxy outside the Milky Way, plus a previously unknown giant star