At least 70% of the very high energy gamma rays emitted by cosmic rays are due to
Place of acceleration of protons, main componentscosmic rays remained a mystery for a hundred years. The authors of the new work have quantitatively shown how many cosmic rays are produced in the supernova remnant: this will help clarify their origin.
The source of cosmic rays, or particles from the veryhigh energy in the Universe has been a mystery since their discovery in 1912. Cosmic rays drive the chemical evolution of interstellar matter, so how they are formed is important to understanding the evolution of our galaxy.
Cosmic rays are believed to be acceleratedsupernova remnants and reach Earth almost at the speed of light. Recent gamma ray observations have shown that many supernova remnants emit teraelectronvolt (TeV) gamma rays.
If gamma rays are produced by protons, whichare the main component of cosmic rays, then the origin of supernova remnants of cosmic rays can be known. However, gamma rays are also produced by electrons, so it is necessary to determine whether proton or electron origin is dominant.
Research results confirm thatGamma rays come from the proton component, which is the basis of cosmic rays. The authors also found out that galactic cosmic rays are formed from supernova remnants.
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