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Scientists have observed the farthest galaxy

An international team of astronomers, including researchers at the Harvard-Smithsonian Center for Astrophysics, has observed the farthest astronomical object, an early galaxy.

A mass called HD1, a probable galaxy about 13.5 billion light-years away. Also in an article published in the Monthly Notices of the Royal Astronomical Society Letters, Scientists have begun to study possible guesses about the exact nature of the galaxy.

The team puts forward two ideas. : HD1 may be forming stars with astonishing speed and possibly even a star house Population III; The first stars in the universe to ever be seen. HD1, on the other hand, may have a very massive black hole about 100 million times the mass of our Sun.

A resource at such a distance can be challenging. It is like guessing the nationality of a ship from a flag that is raised, while it is on a distant shore, between a hurricane and thick fog. You may see some colors and shapes of the flag, but it is not entirely possible. "So, this is ultimately a long game of analyzing and eliminating unacceptable scenarios." HD1 shines brightly in ultraviolet light. "Some energetic processes take place there, or rather billions of years ago," Pacucci said.

Researchers initially thought that HD1 was a standard Starburst galaxy. A galaxy that forms stars at high speed. But after calculating the number of satellites that HD1 produced, they reached an incredible rate and estimated that HD1 would produce more than 100 stars each year. This is at least 10 times more than what is expected for these galaxies. "

BingMag.com <b>Scientists</b> <b>have</b> <b>observed</b> the <b>farthest</b> galaxy

HD 1 is the most distant galaxy ever observed.
Credit: Harikane et al

Thus, the research team suspected that HD1 might not form normal stars. "The first star populations to form in the universe were more massive, brighter and hotter than today's stars," Pacuchi said. Assuming the stars produced in HD1 are the first stars or population 3, its properties can be more easily explained. In fact, the population of population 3 is capable of producing more ultraviolet light than ordinary stars, which can explain the high UV brightness of HD1. As it swallows large amounts of gas, high-energy photons may be emitted from around the black hole. If so, this black hole is by far the first known massive black hole to have been observed at a much closer time to the Big Bang than the current record holder.

"Echo 1 represents a giant baby in the maternity ward of the early universe," said Avi Loeb, an astronomer at the Harvard Astrophysics Center and co-author of the Immersion study. "This record almost doubles the highest redshift of quasars, which is a remarkable feat." "It was very difficult to find HD1 out of more than 700,000 objects," said Yuichi Harikane, an astronomer at the University of Tokyo who discovered the galaxy. HD1's red color surprisingly matched the expected properties of a galaxy 13.5 billion light-years away, and when I found it, I changed a little. "

The team then made subsequent observations using the Atacama Millimeter/Submillimeter Array (ALMA) to confirm a distance that is 100 million light-years away from GN-z11, the current record holder for the farthest galaxy. Soon, the team will use the James Webb Space Telescope to re-observe HD1 to determine its distance from Earth. If current calculations are correct, HD1 would be the farthest and oldest galaxy ever discovered. To confirm his theories. "A few hundred million years after the Big Bang, a black hole in HD1 must have grown at an unprecedented rate of mass," Loeb noted. Once again, nature seems to be beyond Imagine!

Cover Photo: Graphic Design of a galaxy
Credit: Pikrepo


Source: Phys.Org

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