Possible formation of globular clusters very early, about 500 million years after the birth of the universe.
On the 29th, researchers at the University of Toronto in Canada announced a globular cluster of distant galaxies, including the oldest known star, captured by the James Webb Space Telescope (JWST).
As a result of capturing and analyzing signals from globular clusters using JWST, the researchers indicated that they may contain early stars that glowed about 500 million years after the birth of the universe, 13 billion years ago or earlier.
This is much older than our Sun formed about 4.6 billion years ago.
According to the University of Toronto in Canada and the American Astronomical Society (AAS), researchers at the university’s Dunlap Institute for Astronomy and Astrophysics, including Dr.
This is the result of a preliminary analysis of the “Webb’s First Deep Field” image that NASA released to the public on July 11 this year.
The researchers explained that it could be information about some of the oldest galaxies that appeared in the universe.
The research team comprehensively analyzed data collected by the Near Infrared Camera (NIRCam), the Near Infrared Imager and Spectrophotometer (NIRISS) and legacy data from the Hubble Space Telescope (HST) in the past. I have come to a conclusion.
“JWST’s goal is to discover the first stars and first galaxies and help us understand what constitutes a source of complexity in the universe, such as the chemical elements and building blocks that create life,” Mola said.
“This discovery, which was made in the first deep field of the Internet, already provides detailed information about the early stages of star formation,” he said.
The researchers focused on a specific portion of the first deep field images on the web.
This is the visible part of the galaxy, which the researchers decided to call “diamond”.
This galaxy is about 9 billion light-years away.
When observing with JWST, the identity of the bright yellow and red dots (flares) visible around them was unclear.
Researchers believe these flares could be in the form of young star clusters actively forming stars 3 billion years after the beginning of the universe, the Big Bang, or globular clusters of very old stars.
A globular cluster is a dense collection of tens to tens of millions of stars that formed since the early days of galaxies and contains information that could be evidence of the early formation and growth of galaxies.
There are about 150 globular clusters in our galaxy, but it is not known exactly when they formed.
By analyzing 12 points around the “Sparkler Galaxy,” the researchers showed that five of them appear to belong to the oldest known globular clusters.
This is the first time that very distant globular clusters have been used to estimate the ages of the oldest stars in distant galaxies.
Dr. “It was a great time to look at the first JWST images and find ancient globular clusters around distant galaxies,” Ayer said. “This allowed us to better understand its physical properties, such as its age and the number of stars there.”
However, the estimate “about 500 million years after the Big Bang, 13 billion years ago or earlier” comes from an early analysis, so it’s hard to say for certain.
The paper containing the research findings was published on the 29th in Astrophysical Journal Letters, an academic journal published by AAS.
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