2023-11-15 07:00:06
Formed regarding 500 million years following the Big Bang, some of the primitive galaxies radiate a luminosity so intense that it defies our current understanding. Indeed, such brilliance was previously associated only with massive galaxies, such as the Milky Way (also called “our galaxy”, or sometimes…), which took much longer to form .
Image from the James Webb Space Telescope showing the galaxy (Galaxies is a French quarterly magazine devoted to science fiction. With…) MACS0647-JD, observed only 400 million years following the Big Bang (The Big Bang is the dense and hot era that the universe experienced…).
Credit: NASA, ESA, CSA, & STScI, APagan (STScI)/ Alamy Live News via Digitaleye
This discovery by the James Webb Space Telescope calls into question the theories according to which, a few million years following the Big Bang, energy (In the common sense energy refers to anything that allows us to carry out work, make energy …) condensed into matter (Matter is the substance which makes up any body having a tangible reality. Its…), resulting in the slow formation of the first stars. The telescope revealed a surprisingly large number of stars in these primitive galaxies.
Astronomers found a possible answer to this riddle: a large group of galaxies 12 billion years old, almost 90% of which were surrounded by glowing gas. This gas, once ignited by the light of the surrounding stars, triggered (or triggered barrel roll) is an aerial aerobatics figure. explosions of star formation as the gas cooled. This research, intended to be published in The Astrophysical Journal, was directed by Anshu Gupta, astrophysicist at the University. of higher education whose objective is…) of Curtin in Australia (Australia (officially Commonwealth of Australia) is a country of…).
Anshu Gupta explains that “interactions with neighboring galaxies are responsible for the unusual brightness of primitive galaxies.” These interactions would also have contributed to their more massive nature (The word massive can be used like :).
The study of the bright gas clouds was carried out using the James Webb Space Telescope’s Deep Extragalactic Advanced Exploration, which used three of its instruments to collect infrared images of the galaxies and then analyze their spectra. By examining the frequencies of light emitted by these galaxies, the researchers discovered peaks of “extreme emission characteristics,” indicating that the gas was capturing light from nearby stars before re-emitting it.
Comparing this emission spectrum with those measured in more recent galaxies revealed that only regarding 1% of them showed similar characteristics. This study provides important insight into early galaxies and the early chemistry of the Universe.
For Anshu Gupta, understanding the conditions surrounding galaxies and stars in the early Universe is essential to better understanding our own world, because “the chemical elements that constitute everything tangible on Earth and in the Universe, with the exception of hydrogen and helium, find their origin in the hearts of distant stars.
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