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Astrophysics and Space Science

, Volume 166, Issue 1, pp 17–33 | Cite as

Modification of gamma-ray spectrum in a photon field

  • I. P. Ivanenko
  • V. V. Sizov
Article

Abstract

The changes in the high-energy gamma-ray spectra due to electron-photon cascading in the photon field (e.g., microwave background radiation) are investigated.

The propagation of gamma-rays with an initial power-law spectrum through an isotropic monoenergetic photon field is considered. Two processes of the cascade particle-photon field interaction are taken into account, namely, the photoproduction of electron-positron pairs and the inverse Compton effect. The effect of the synchrotron energy loss by cascade electrons in a magnetic field on the cascade gamma-quantum spectrum is studied. The results may be used to estimate the absorption and the variations in the shape of the spectrum of radiation from compact gamma-ray sources in the metagalaxy.

The cascade characteristics have been obtained by numerically solving the cascade equations by the moment method.

Keywords

Microwave Energy Loss Background Radiation Moment Method Field Interaction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • I. P. Ivanenko
    • 1
  • V. V. Sizov
    • 1
  1. 1.Institute of Nuclear PhysicsMoscow State UniversityMoscowU.S.S.R.

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