Astronomers Discovered Quadruple-Double Radio Galaxy
Researchers identified a galaxy with four distinct jet outbursts, revealing the long-term precession of its central black hole.
Updated on Sept. 29, 2026 in Physics
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Astronomers have identified J023721.13-010528.5, the first radio galaxy confirmed to possess four distinct pairs of jet outbursts. This massive structure spans 3.9 million light-years and indicates a recurring, rotating cycle of black hole activity.
Why it matters
The galaxy demonstrates that central black hole spin axes can wobble significantly over millions of years, leading to the observed S-shaped trajectory of energetic outflows. This finding provides a rare look at the episodic nature of galactic activity and the evolution of supermassive black holes.
The galaxy shows spectral ages for its hotspot pairs ranging from 4.5 to 20.5 million years. Researchers mapped the jet axes using GMRT, MeerKAT, and Very Large Array data, identifying progressive angular shifts of -7, -16, and -24 degrees in successive outbursts.
The players
J023721.13-010528.5
An elliptical galaxy located at redshift 0.372 that hosts this record-breaking radio structure.
GMRT
The Giant Metrewave Radio Telescope, a radio interferometer located in Pune used for high-resolution astronomical mapping.
The details
The researchers identified these structures by analyzing radio spectral changes and the physical distance of hotspots—dense regions of high-energy particles—from the galactic center. The jet axes exhibit a counterclockwise rotation, suggesting that the central black hole's spin axis is slowly precessing, or wobbling, over time. By comparing these hotspots, astronomers determined that the galaxy has undergone four separate cycles of activity rather than a single sustained burst.
Timeline
The four distinct jet outbursts occurred between 4.5 to 20.5 million years ago.
The Tech Race
This discovery marks the first time a quadruple-double radio galaxy has been identified, extending the known catalog of multi-episode radio sources. While roughly 200 double-double radio galaxies are known, only seven triple-double variants had been documented prior to this finding.
This research provides astrophysicists with a new benchmark for modeling the long-term stability and rotational mechanics of galactic centers. The discovery does not impact commercial technology, but it refines the data used in radio astronomy software and galaxy evolution simulations.
The takeaway
This discovery confirms that black hole outbursts are not isolated incidents but part of a recurring cycle influenced by precession. Researchers will likely watch for other high-redshift candidates to see if similar multi-episode patterns exist in other massive elliptical galaxies.
Further reading
For more on how modern observatories map the early universe, visit the Physics section.
Source note: This article includes information reported by Innovation News Network.
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