Discovery of the Origin of the Most Energetic Particles in the Galaxy VIDEO – Science and Technology

    The origin of the galaxy's most energetic particles discovered (source: NASA) © Ansa

The origin of the galaxy’s most energetic particles discovered (source: NASA) © ANSA / Ansa

The point of origin of the most energetic particles in our galaxy, very high energy cosmic rays, has been discovered. They were supposed to be produced by a supernova explosion, a large star in the last stages of its existence, not far from the center of the Milky Way. A research team at the University of Wisconsin identified it using data from the Fermi Space Telescope. The result is published in Physical Review Letters.

Our galaxy is occasionally traversed by traveling very high-energy particles, so-called high-energy cosmic rays, and astrophysicists have been trying for decades to understand their origin. These particles are 10 times more energetic than those produced by the largest artificial accelerators such as the Large Hadron Collider (LHC) at CERN in Geneva, and many indications indicate that the accelerations caused by very strong supernova explosions are pushing them so fast. . However, it was never possible to be sure.

“Theorists believe that the highest-energy cosmic-ray protons in the Milky Way reach an energy of a million billion electron volts, or PeV,” said Ke Fang of the University of Wisconsin-Madison, “but the exact nature of their sources, which we call PeVatrons, has been difficult to achieve. define. “Analysis of data collected by the Fermi Space Telescope has allowed us to identify a possible source in a supernova remnant identified as G106.3+2.7, located approximately 2,600 light-years from Earth. “Now, with 12 years of Fermi data, we think , Fang said, “that we have shown that G106.3+2.7 is indeed a PeVatron.”

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