Astronomers tracked cosmic rays to objects that launch particles with energy 10 times greater than the Large Hadron Collider.
Because neutron stars form when stars undergo gravitational collapse, which also launches out supernovas, there is good reason for researchers to think that the pulsar and the supernova wreckage cloud were created by the same violent event.
Using NASA's Fermi Large Area Telescope, astronomers spotted a high-energy gamma-ray afterglow that implies G106.3+2.
Tracing cosmic rays back to supernova wreckage has been difficult because the protons that comprise cosmic rays are electrically charged. Cosmic rays are thus prone to scattering while interacting with magnetic fields as they journey through space. Astronomers, therefore, cannot easily tell from which direction the rays are coming when they finally reach our planet.
Because the acceleration of protons to such high speeds causes the emission of gamma-rays, however, this high-energy light could be a good proxy for detecting the source of cosmic rays.Both Fermi and the Very Energetic Radiation Imaging Telescope Array System at the Fred Lawrence Whipple Observatory, southern Arizona, detected gamma-rays from inside the tail of the supernova wreckage of G106.3+2.7.
"This object has been a source of considerable interest for a while now, but to crown it as a PeVatron, we had to prove it is accelerating protons,""The catch is that electrons accelerated to a few hundred TeV can produce the same emission. Now, with the help of 12 years of Fermi data, we think we’ve made the case that G106.3+2.7 is indeed a PeVatron."
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