Effect of extragalactic magnetic field on cascade gamma-ray emission

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Abstract

The intensity of diffuse cascade gamma-ray emission produced in electromagnetic cascades when ultra-high energy cosmic rays propagate in extragalactic space is discussed. It is obtained that in the range of ~107—109 eV diffuse cascade gamma-ray spectra weakly depends on extragalactic magnetic field value. Thus, there is no need to refine extragalactic magnetic field models to estimate the intensity of cascade emission in this energy range.

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About the authors

A. V. Uryson

Lebedev Physical Institute of the Russian Academy of Sciences

Author for correspondence.
Email: uryson@sci.lebedev.ru
Russian Federation, Moscow

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2. Fig. 1. Model spectra of diffuse cascade gamma-ray emission near the Earth at B = 10-6, 10-12 Gs. The spectra at B < 10-12 and B = 10-12 Gs coincide

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