Thursday 23 January 2025
Scientists have made a major breakthrough in understanding how supermassive black holes at the centers of galaxies launch powerful jets of energy into space. The discovery, published in a recent study, uses a combination of two cutting-edge astronomical techniques to peer into the heart of these massive objects.
The scientists used very long baseline interferometry (VLBI) to observe the black hole’s jet in unprecedented detail. VLBI allows astronomers to combine the signals from multiple radio telescopes around the world to create a virtual Earth-sized telescope, capable of resolving features as small as a few light-hours across.
In this case, the team targeted the black hole at the center of the galaxy 3C 84, located about 300 million light-years away. By observing the jet in both centimeter and millimeter wavelengths, they were able to study its structure and behavior in unprecedented detail.
The observations revealed a complex pattern of magnetic fields surrounding the black hole, with electric vector position angles (EVPA) that suggest a toroidal or helical configuration. This is consistent with simulations of relativistic magneto-hydrodynamic flows, which can produce such patterns.
The team also detected a double rail structure in the jet’s core region, with distinct EVPA orientations along each rail. This suggests that the jet is launched by magnetic fields interacting with accreting material, rather than through the extraction of rotational energy from the black hole itself.
Further analysis revealed a preference for an advection-dominated accretion flow (ADAF) in a magnetically arrested (MAD) state around a rapidly rotating supermassive black hole. This is consistent with theoretical models of jet launching and suggests that the jet’s power is fueled by the accretion disk surrounding the black hole.
The study’s findings provide new insights into the complex processes occurring at the heart of galaxies, where supermassive black holes play a crucial role in shaping their evolution. By combining advanced astronomical techniques and sophisticated simulations, scientists can gain a deeper understanding of these powerful objects and their impact on the universe.
Cite this article: “Unraveling the Secrets of Supermassive Black Hole Jets”, The Science Archive, 2025.
Supermassive Black Holes, Galaxy Centers, Jet Launching, Magnetic Fields, Accretion Disk, Advection-Dominated Accretion Flow, Magnetically Arrested, Relativistic Magneto-Hydrodynamic Flows, Vlbi, Radio Telescopes
