Astronomers Find Ancient Radio Signals from Distant Galaxy Cluster

Astronomers studying a faraway galaxy cluster have detected ancient radio signals that may provide insights into the early universe. The signals, originating from a mini-halo filled with high-energy particles and magnetic fields, took 10 billion years to reach Earth. This discovery sheds light on the processes shaping galaxy clusters throughout the history of the universe.

Jun 29, 2025 - 10:28
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Astronomers Find Ancient Radio Signals from Distant Galaxy Cluster

Astronomers studying a distant galaxy cluster stumbled upon ancient radio signals that might hold clues to the formation of the early universe. While studying the distant galaxy cluster known as SpARCS1049, astronomers detected faint mysterious radio waves, according to a study published in The Astrophysical Journal Letters and available on the pre-print server Xrxiv.

The discovered radio waves, which took 10 billion years to reach Earth, originated from a vast region of space filled with high-energy particles and magnetic fields. These vast clouds of high-energy particles are known as a mini-halo. A mini-halo has never been detected this deep into space before, according to the study.

Mini-halos are described in the study as faint groups of charged particles. These groups are known to emit both radio and X-ray waves. Mini-halos are typically found in clusters between galaxies.

Roland Timmerman of the Institute for Computational Cosmology of Durham University and co-author of the study said in a statement in Phys.org how these particles are important for the creation of our universe. \"It's astonishing to find such a strong radio signal at this distance,\" Timmerman said. \"It means these energetic particles and the processes creating them have been shaping galaxy clusters for nearly the entire history of the universe.\"

The astronomers analyzed data from the Low Frequency Array (LOFAR) radio telescope. The LOFAR is made up of 100,000 small antennas across eight European countries, according to the study.

The team of astronomers believes there are two causes for the makeup of these mini-halos. According to the study, the first explanation is supermassive black holes found at the heart of galaxies. The second explanation is cosmic particle collisions.

According to the study, astronomers now believe that this discovery suggests that either black holes or particle collisions have been energizing galaxies earlier than previously believed. New telescopes being developed like the Square Kilometer Array will eventually let astronomers detect even more faint signals.

Julie Hlavacek-Larrondo from the University of Montreal and co-lead author of the study said in a statement she believes this is just the beginning to the wonders of space. \"We are just scratching the surface of how energetic the early universe really was,\" Hlavacek-Larrondo said in the statement. \"This discovery gives us a new window into how galaxy clusters grow and evolve, driven by both black holes and high-energy particle physics.\"

According to the source: AOL.com.

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