The age-old mystery of the source of cosmic rays in the Milky Way revealed

At least 70% of the very high energy gamma rays that emit cosmic rays are due to

relativistic protons, the authors of the new work found out based on the analysis of images of radio, X-ray and gamma radiation.

Place of acceleration of protons, main componentscosmic rays, remained a mystery for a hundred years. The authors of the new work quantitatively showed how many cosmic rays are formed in the supernova remnant: this will help to 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 contribute to the chemical evolution of interstellar matter, so how they are formed is important for understanding the evolution of our galaxy.

Cosmic rays are believed to be acceleratingsupernova remnants and reach Earth at almost the speed of light. Recent observation of gamma rays has shown that many supernova remnants emit teraelectron-volt (TeV) gamma rays.

If gamma rays are produced by protons thatare the main component of cosmic rays, then the origin of supernova remnants of cosmic rays can be found out. However, gamma rays are also produced by electrons, so it is necessary to determine if the dominant origin is proton or electronic.

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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