Investigation of Cosmic-Ray Sources with Gamma-Ray Initiated Showers

A. V. Uryson

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arXiv · 1508.03378

Investigation of Cosmic-Ray Sources with Gamma-Ray Initiated Showers

A. V. Uryson

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Abstract

A new method of investigating ultra-high energy cosmic ray sources is suggested. The method is based on analysis of gamma-ray emission that is generated in extragalactic space when ultra-high energy cosmic particles interact with cosmic background. We have found that intensity of the gamma-ray emission depends on characteristics of cosmic ray sources, specifically on their remoteness and initial particle energy spectra. In the Earth atmosphere cosmic rays initiate air showers, therefore selecting quanta-initiated showers (and excluding those from the galactic plane, gamma-ray sources, etc.) we can obtain above mentioned source characteristics. We derive that the number of quanta-initiated showers is 0 or ~3x1000 depending on source parameters, typical statistics of showers registered at 10^14 eV being of ~10^8. The difference is large enough to use this method for studying ultra-high energy cosmic ray sources.

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A. V. Uryson. 2015-08-13. Investigation of Cosmic-Ray Sources with Gamma-Ray Initiated Showers. https://arxiv.org/abs/1508.03378

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