Advertisement

Signatures of Energetic Protons and Electrons in the Galaxy

  • A. W. Strong
Conference paper
Part of the Space Sciences Series of ISSI book series (SSSI, volume 13)

Abstract

Models of the cosmic-ray, γ-ray and synchrotron properties of the Galaxy allow conclusions to be drawn about the cosmic-ray injection spectrum and propagation parameters. While the simplest models fail to reproduce the data, reasonable extensions can explain a range of observational facts. Explanations for the diffuse γ-ray GeV excess found by EGRET are considered; inverse-Compton emission resulting from a hard electron injection spectrum appears most promising. Meanwhile the γ-ray emission at MeV energies is unlikely to originate entirely from cosmic-ray electrons, and a point source component is required in addition.

Keywords

Galactic Cosmic Radiation Injection Spectrum Inverse Compton Emission Egret Data Latitude Profile 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Barwick, S. W. et al.: 1998, ‘The Energy Spectra and Relative Abundances of Electrons and Positrons in the Galactic Cosmic Radiation’, Astrophys. J. 498, 779–789.Google Scholar
  2. Basini, G. et al.: 1999, ‘The Flux of Cosmic-ray Antiprotons from 3.7 to 24 GeV’, Proc. 26th Int. Cosmic Ray Conf. 3, 77–80.Google Scholar
  3. Ellison, D.: 2001, Space Sci. Rev., this volume.Google Scholar
  4. Moskalenko, I. V. and Strong, A. W.,: 2000, ‘Anisotropic Inverse Compton Scattering in the Galaxy’, Astrophys. J. 528, 357–367.ADSCrossRefGoogle Scholar
  5. Moskalenko, I. V., Strong, A. W., and Reimer, 0.: 1998, ‘Diffuse Galactic Gamma Rays, Cosmic-ray Nucleons and Antiprotons’, Astron. Astrophys. 338, L75 - L78.ADSGoogle Scholar
  6. Moskalenko, I. V., Christian, E. R., Moiseev, A. A., Ormes, J. F., and Strong, A. W.: 2001, ‘Antiprotons below 200 MeV in the Interstellar Medium: Perspectives for Observing Exotic MatterGoogle Scholar
  7. Signatures’, Proc. COSPAR Coll. The Outer Heliosphere: The Next Frontiers’ (in press).Google Scholar
  8. Pohl, M. and Esposito, J. A.: 1998, ‘Electron Acceleration in SNR and Diffuse Gamma Rays above 1 GeV’, Astrophys. J. 507, 327–338.ADSCrossRefGoogle Scholar
  9. Strong, A. W. and Moskalenko, I. V.: 1998, ‘Propagation of Cosmic-ray Nucleons in the Galaxy’, Astrophys. J. 509, 212–228.ADSCrossRefGoogle Scholar
  10. Strong, A. W., Moskalenko, I. V., and Reimer, O.: 2000, ‘Diffuse Continuum Gamma Rays from the Galaxy’, Astrophys. J. 537, 763–784.ADSCrossRefGoogle Scholar
  11. Valinia, A. et al.: 2000, ‘On the Origin of the Iron K Line in the Spectrum of the Galactic X-ray Background’, Astrophys. J. 543 733–739.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  • A. W. Strong
    • 1
  1. 1.Max-Planck-Institut für extraterrestrische PhysikGarchingGermany

Personalised recommendations