Scientists Finally Uncover Hidden Rule Behind Cosmic Rays After Century-Long Mystery
DAMPE space telescope reveals universal pattern in mysterious high-energy particles, offering new clues about their galactic origins and behavior.
After more than 100 years of scientific investigation, researchers have discovered a surprising universal pattern in cosmic rays that could finally help explain where these incredibly powerful particles originate. Using data from the DAMPE (Dark Matter Particle Explorer) space telescope, scientists found that cosmic ray particles ranging from tiny protons to heavy iron nuclei all begin declining more sharply at exactly the same energy threshold, revealing a hidden rule that governs their behavior across the galaxy.
Cosmic rays represent some of the most energetic phenomena in the known universe, carrying far more energy than particles produced by even the most advanced accelerators on Earth. These mysterious particles are believed to originate from violent cosmic events including supernova explosions, black hole jets, and pulsars. Despite their fundamental importance to astrophysics, many questions about their acceleration mechanisms and propagation through space have remained unanswered for decades.
The breakthrough came from analyzing highly precise data collected by DAMPE, which launched in December 2015 with significant contributions from the University of Geneva's Department of Nuclear and Particle Physics. Researchers discovered that for every type of nucleus studied, the number of particles begins dropping much more rapidly after reaching a rigidity of roughly 15 teraelectron-volts. This phenomenon, known as "spectral softening," appears consistently across different particle types, strongly supporting theories that cosmic ray behavior is controlled by rigidity rather than energy per nucleon.
Andrii Tykhonov, an associate professor at the University of Geneva and co-author of the study, explained that cosmic rays include protons, helium, carbon, oxygen, and iron nuclei categorized by their energy levels from low to extremely high ranges. The universal nature of this newly discovered pattern suggests that cosmic ray acceleration and movement through space follow fundamental physical principles that apply regardless of the specific type of particle involved.
The research team's findings, published in Nature, achieve a confidence level of 99.999% against alternative theoretical models based on energy per nucleon. This discovery not only advances our understanding of cosmic ray physics but also provides crucial observational evidence for theories about how these particles propagate through the magnetic fields and matter that fill interstellar space. The work represents a significant step toward solving one of astrophysics' most enduring puzzles about the universe's most powerful natural particle accelerators.
