While analyzing radio signals from 10 billion years ago, astronomers have discovered “minihalo” (clouds of energy particles) around distant clusters of galaxies. Unexpected discoveries could further encourage understanding of the early universe.
This mini halo is the furthest ever detected, and is located twice as far from Earth as the next largest mini halo. It also contains a huge, strong magnetic field that spans more than 15 times the width of the Milky Way. This finding has been accepted for publication in Astrophysical Journal Letters and is available on Preprint Server Arxiv.
“It’s amazing to find such a powerful radio signal at this distance,” said Roland Timmerman, a radio astronomer at Durham University, in a statement.
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How was the mini halo formed?
Minihalos is a faint group of charged particles that emit radio and X-ray waves into the vacuum of intergalactic space. They were detected around galaxy clusters in local space, but they were not as far back as space and time as reported in new research.
According to researchers, there are two theories that can explain particle collection.
One possible cause is the ultra-large black holes located in the centre of a large galaxy within a distant cluster. These black holes can shoot high-energy particles into space, but it is not clear how particles move from the powerful black holes to mini halo without losing significant energy.
Another possible means of creation is the collision of charged particles within plasmas within galaxy clusters. When these high-energy particles collide with each other, they can often break down into the kinds of particles that can be seen from Earth, when they are close to the speed of light.
Related: James Webb Telescope unveils the largest map in the universe’s history, spanning over 13 billion years
Impact on astronomy
The observations of minihalo come from very old light, altering the painting of galaxy layers, proving that these charged particles surround the galaxy for billions of years more than known.
“Our discoveries mean that clusters of galaxies have been immersed in such particles since their formation,” said Julie Flavassek Laloond, an astrophysicist at the University of Montreal, an astrophysicist who co-studies the research and told Live Science in an email. It’s something I didn’t expect at first.
Scientists can study the origins of these minihalos to determine whether black holes or particle collisions are responsible for them.
These particles also have hands on other astrophysical processes, such as star formation. They can affect the energy and pressure of gases within the galaxy. These processes can prevent the gas cloud from collapse and change how stars in the gas form.
“We’re still learning a lot about these structures, so unfortunately, there are still so many more quantitative drawings in development,” Timmerman told Live Science in an email.
New radio telescopes like the SKA Observatory are being developed to help astronomers detect accidental signals and learn about mini halos.
“We’re just scratching the surface of how energetic the early universe was,” Hlavacek-Larrondo said.
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