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A new hypothesis suggests the colossal winds from supermassive black holes are the accelerators behind the universe's most powerful particles, potentially solving a 60-year-old cosmic mystery.
October 6, 2025
Source:
SciTechDaily
Cosmic Winds and Energetic Particles
For six decades, scientists have puzzled over the origin of ultra-high-energy cosmic rays (UHECRs), the most energetic particles ever observed. Now, a groundbreaking theory from the Norwegian University of Science and Technology (NTNU) points to a powerful suspect: the winds of supermassive black holes.
These particles possess energies millions of times greater than what can be achieved in particle accelerators on Earth. The NTNU research team, led by Associate Professor Foteini Oikonomou, proposes that colossal winds, gusting from active galactic nuclei (AGN) at speeds up to half the speed of light, could be the cosmic engines responsible for this incredible acceleration.
This new hypothesis offers a compelling explanation for one of the universe's most persistent mysteries.
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Source:
http://Phys.org
Modeling the Universe's Accelerators
The NTNU team's findings are based on sophisticated, high-resolution 3D simulations. These models explored how atomic nuclei behave when trapped inside the immense wind tunnels produced by supermassive black holes at the centers of galaxies.
Energy and Composition
The simulations revealed that these powerful winds can effectively catapult particles to the extreme energy levels seen in UHECRs. Crucially, the model also aligns with the known chemical makeup of these cosmic rays.
Mixed Composition: The model explains why UHECRs are composed of a mix of elements, including protons, helium, and nitrogen.
Particle Evolution: According to the simulations, heavier particles break down into lighter elements during the intense acceleration process.
This alignment with both energy and composition data makes the black hole wind theory a strong contender in the field.
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Source:
ScienceDaily
The Neutrino Connection
To validate their theory, scientists are now looking for a "smoking gun" signal in the form of high-energy neutrinos. According to the model, these elusive particles would be produced alongside UHECRs in the turbulent black hole winds.
An Undeflected Messenger
Unlike cosmic rays, which are charged particles that get deflected by cosmic magnetic fields, neutrinos travel across the universe in a straight line. This unique property makes them ideal cosmic messengers.
If high-energy neutrinos can be detected and traced back to the vicinity of a supermassive black hole, it would provide powerful, direct evidence confirming that these cosmic behemoths are indeed the source of the universe's most energetic particles.
How do black hole winds compare to other theories in explaining cosmic rays?
While other theories exist, such as acceleration in gamma-ray bursts or galaxy clusters, the black hole wind hypothesis is compelling because its simulations align well with both the observed energy levels and the specific chemical makeup of ultra-high-energy cosmic rays (UHECRs). It provides a comprehensive model that explains multiple data points simultaneously.
What specific evidence supports the idea that black hole winds accelerate cosmic rays?
How do the NTNU team's simulations account for the chemical composition of cosmic rays?
What role do neutrinos play in testing the black hole wind hypothesis?
How do supermassive black holes generate winds that can reach half the speed of light?
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