Astronomers using the Chandra X-ray Observatory have detected a jet from a supermassive black hole disturbing gas in a distant galaxy known as the 'red potato,' offering new insight into how black holes can suppress star formation in the early universe
Astronomers have identified a supermassive black hole jet interacting with the gas surrounding a distant galaxy, designated MQN01 J004131.9-493704 and informally called the 'red potato.' This finding, based on X-ray observations from NASA's Chandra X-ray Observatory, provides evidence that black hole activity can inhibit star formation in galaxies during the universe's early epochs.
Observing a Turbulent Galaxy
The 'red potato' galaxy is located approximately 11.7 billion light-years from Earth, placing it at a time when the universe was only about 2 billion years old. Its unusual, blob-like appearance was first noted in data from the James Webb Space Telescope, which revealed a dense reservoir of cold gas surrounding the galaxy. Despite the presence of this gas, astronomers found little evidence of ongoing star formation, a puzzling result given the conditions typically associated with stellar birth.
To investigate the cause of this inactivity, researchers turned to Chandra's X-ray capabilities. The observatory detected a jet of high-energy particles originating from a supermassive black hole in a neighboring galaxy, roughly 200,000 light-years away. This jet appears to be colliding with the gas enveloping the red potato, stirring it and raising its temperature, which may prevent the gas from cooling and collapsing into new stars.
Black Hole Feedback and Star Formation
The Chandra data show that the gas around the red potato is more turbulent than similar regions in other galaxies at comparable distances. This turbulence is consistent with the impact of a black hole jet, which can inject energy into the surrounding medium and disrupt the conditions needed for star formation. The galaxy hosting the black hole jet, in contrast, is actively forming stars, as are other nearby galaxies, highlighting the localized effect of this feedback process.
By analyzing the spatial relationship between the jet and the red potato, the team concluded that the jet's energy input is likely responsible for the suppression of star formation in this particular galaxy. This mechanism, known as black hole feedback, is thought to play a significant role in regulating galaxy growth, but direct evidence of such interactions in the early universe has been limited until now.
Numerical Context and Research Status
The study focused on MQN01 J004131.9-493704 at a redshift corresponding to a lookback time of 11.7 billion years. The black hole jet was traced to a galaxy separated by about 200,000 light-years from the red potato. The research, published in July 2026 in Astronomy & Astrophysics, used Chandra's X-ray imaging to map the jet's direction and its interaction with the gas. The findings add to a growing body of evidence that black hole-driven outflows can influence galaxy evolution, complementing earlier work on how ancient galaxies enriched the cosmos with dust, such as the recent analysis of dust production in early galaxies using the James Webb Space Telescope.
Limits and Open Questions
While the observations strongly suggest that the black hole jet is suppressing star formation in the red potato, alternative explanations-such as environmental effects from the cosmic web or prior starburst activity-cannot be entirely ruled out. The precise efficiency of jet-driven heating and its long-term impact on galaxy evolution remain active areas of research. Further multiwavelength observations and simulations will be needed to clarify how common such interactions were in the early universe and to quantify their role in shaping the population of galaxies observed today.
Understanding how black holes influence their host galaxies is central to modern astrophysics. In this case, the evidence points to a direct link between a supermassive black hole jet and the quenching of star formation in a neighboring galaxy, offering a rare glimpse into the complex interplay between cosmic structures during a formative period of the universe.
Black hole feedback refers to the process by which energy and momentum from an active black hole-often in the form of jets or winds-are transferred to the surrounding gas in a galaxy. This feedback can heat, stir, or expel gas, making it more difficult for the material to cool and collapse into new stars. X-ray observatories like Chandra are particularly well-suited to detecting the high-energy signatures of such interactions, as X-rays can penetrate dense gas and reveal the presence of energetic outflows. By mapping these effects, astronomers can better understand the balance between star formation and black hole activity across cosmic time.
