Astronomers find strange galaxy In the early days of the universe When the light from the dust and gas surrounding the star shines brighter than the starlight, And it may be a galaxy that was halfway through the first generation of star formation before evolving into the galaxy we know today.
The galaxy GS-NDG-9422 may appear as a hazy bright spot. in the deep space images of the James Webb telescope, but data from examining the spectra of galaxies that have existed since 12.8 billion years ago have led astronomers We saw characteristics of light data that had never been seen before.
Alex Cameron, lead researcher from the University of Oxford, said: “After seeing the spectral data of the galaxy, My first thought was, ‘This is very strange’, which is exactly what the James Webb camera was designed to find. like all new phenomena in the early days of the universe That helps us understand how this entire universe began.”
After consulting with astrophysicist Harley Katz who have created a model to simulate cosmic dust gas that is heated by a massive star To the point where the dust and gas shine brighter than the star. This is similar to the data obtained by the James Webb telescope.
Astronomers found that stars in galaxy GS-NDG-9422 have temperatures of more than 80,000 degrees Celsius, hotter than more massive stars in local galaxies near Earth, which have temperatures of around 80,000 degrees Celsius. 40,000-50,000 degrees Celsius
The researchers suspect that the galaxy is undergoing rapid star formation. This causes the dust and gas in the galaxy to be continuously hit by photons from massive stars. As a result, these gaseous dust particles are brighter than the light from the star. This is an environment that astronomers predict is similar to the existence of Population III stars, or the first generation of stars that were born in the universe.
However, Katz said, “This galaxy does not have Population III stars because data from the James Webb telescope showed that it is more chemically complex than that.” But the stars there are different from the stars we are used to. This could provide a starting point for understanding how galaxies transitioned from the earliest stellar stages to the galaxies we know today.”
This is because GS-NDG-9422 is the first galaxy to be found to be in this range. This leaves astronomers with many questions still waiting to be answered, such as whether this kind of environment is normal or not. How much information from this galaxy can help us understand the evolution of galaxies at earlier times? The discovery team has been trying to find more galaxies of this type. To help increase our understanding of what happened to the universe in the first 1 billion years after the Big Bang.
Cameron added: “This is a very exciting time. The James Webb Space Telescope allows us to explore areas of the universe that were previously unexplored. Putting us at the beginning of new discoveries. and understand this universe better than ever before.”
picture: NASA, ESA, CSA, STScI, A. Cameron (University of Oxford)
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