Astronomers discover the most powerful radio galaxy ever seen from the early universe

Add ARY News on GoogleFollow on Google DiscoverCredit: arXiv (2026). DOI: 10.48550/arxiv.2609.28632AAResizeAstronomers have confirmed the discovery of TXS 2354+015, a huge radio galaxy almost 12.5 billion light-years from Earth. According to a recent paper on the arXiv preprint server, this ancient galaxy is the most powerful radio galaxy scientists have ever seen.

Active galactic nuclei form when supermassive black holes pull in nearby material, creating huge jets of plasma that send out strong radio waves.

These powerful active galactic nuclei helped shape the early universe. Their energy affected the temperature of nearby gas and influenced how new stars formed in galaxies.

It has always been hard to find these powerful galaxies from the early universe. Studies show that as many as 90 percent are hidden by thick clouds of dust and gas, making them invisible to regular ultraviolet and optical telescopes. Also, the usual way of searching for steep radio signals often misses many of these hidden galaxies.

To solve this problem, a team led by Barbara Balmaverde at the INAF Astrophysical Observatory of Turin tried a new method. They used deep optical images from the Subaru Telescope and compared them with large radio catalogs to look for “dropout” signs.

This method, called the Lyman-break technique, looks for a sudden drop in a galaxy’s light. This drop happens when hydrogen clouds far away absorb ultraviolet light from the galaxy.

The team found TXS 2354+015 and confirmed it has a redshift of 4.946. This means the galaxy comes from a time when the universe was less than 1.2 billion years old, making it the second most distant radio galaxy ever discovered.

When researchers measured its radio power, they found it was much stronger than the previous record-holder from a 2008 survey.

“TXS 2354+015, thus, appears to be the most powerful radio galaxy known to date,” the research team wrote.

Astronomers estimated that the host galaxy weighs about two trillion times as much as our Sun, though they are still unsure about the age of its stars. Finding this ancient galaxy with the optical dropout method shows that regular radio searches miss many galaxies, so there are likely many more hidden giants out there.

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