Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-26T07:35:50.428Z Has data issue: false hasContentIssue false
  • English
  • Français

Galactic Structure and the Cosmic Ray Anisotropy at 1018eV

Published online by Cambridge University Press:  05 March 2013

R. W. Clay
R. W. Clay*
Affiliation:
Department of Physics and Mathematical Physics, University of Adelaide, Adelaide, SA 5005, Australia; rclay@physics.adelaide.edu.au
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Cosmic ray arrival directions at energies a little over 1018 eV have been reported to show an excess from directions close to that of the Galactic centre. That result was originally presented by the AGASA group and was later strengthened by an analysis of SUGAR cosmic ray data. We discuss here a second feature of the AGASA data, a deficit in roughly the Galactic anticentre direction.We interpret this as a result of cosmic ray diffusion past us. We find that the most straightforward interpretation of the data then requires that a strong magnetic field exists out of the plane of our Galaxy to distances of at least several kiloparsecs.

Keywords

cosmic raysISM: magnetic fields
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 18 , Issue 2 , 2001 , pp. 148 - 150
Copyright
Copyright © Astronomical Society of Australia 2001

References

Bellido, J., et al. 2001, Astropart. Phys., 15, 167 Google Scholar
Berezinsky, V. S., et al. 1991, in Astrophysical Aspects of the Most Energetic Cosmic Rays, eds. M. Nagano, & F. Takahara (World Scientific), 134 Google Scholar
Clay, R. W. 2000, PASA, 17, 212 Google Scholar
Clay, R. W., Dawson, B. R., Bowen, J., & Debes, M. 2000, Astropart. Phys., 12, 249 Google Scholar
Clay, R. W., McDonough, M.-A., Smith, A. G. K., & Dawson, B. R. 1998, PASA, 15, 208 CrossRefGoogle Scholar
Clay, R. W., & Smith, A. G. K. 1996a, in Extremely High Energy Cosmic Rays: Astrophysics and Future Observatories, ed. M. Nagano (University of Tokyo), 104 Google Scholar
Clay, R. W., & Smith, A. G. K. 1996b, PASA, 13, 121 Google Scholar
Hayashida, N., et al. 1999, Astropart. Phys., 10, 303 CrossRefGoogle Scholar
Jacklyn, R. M. 1986, PASA, 6, 425 Google Scholar
Lee, A. A., & Clay, R. W. 1995, J.Phys.G: Nucl. Phys., 21, 1743 CrossRefGoogle Scholar
Takeda, M., et al. 1998, Phys. Rev. Lett., 81, 1163 Google Scholar