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Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies
Abstract
The Utah Fly's Eye detector has revealed a change in the cosmic ray composition which is correlated with structure in the all-particle energy spectrum. The data can be fitted by a simple model of a steep power law spectrum of heavy nuclei which is overtaken at high energies by a flatter spectrum of protons. The transition occurs near ${10}^{18.5}$ eV. Anisotropy is not detected, so the high-rigidity particles above the transition energy do not originate in the disk of the Galaxy. An outstanding event of 3\ifmmode\times\else\texttimes\fi{}${10}^{20}$ eV implies that the highest energy particles originate in the contemporary era of the Universe.
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Citations
Cited by
The phantom menaced: Constraints on low-energy effective ghosts
Cline, J. M., Jeon, S., & Moore, G. D. (2004) · Physical Review D · doi:10.1103/physrevd.70.043543 · Cited by 677
Dark energy from mass varying neutrinos
Fardon, R., Nelson, A. E., & Weiner, N. (2004) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2004/10/005 · Cited by 414
sibyll: An event generator for simulation of high energy cosmic ray cascades
Fletcher, R. S., Gaisser, T. K., Lipari, P., & Stanev, T. (1994) · Physical Review D · doi:10.1103/physrevd.50.5710 · Cited by 409
Self-citationOn the statistical significance of the GZK feature in the spectrum of ultra-high energy cosmic rays
De Marco, D., Blasi, P., & Olinto, A. V. (2003) · Astroparticle Physics · doi:10.1016/s0927-6505(03)00148-8 · Cited by 100
Cosmic physics: the high energy frontier
Stecker, F. W. (2003) · Journal of Physics G: Nuclear and Particle Physics · doi:10.1088/0954-3899/29/10/201 · Cited by 48
Metadata
- Authors
- Bird, D. J., Corbató, S. C., Dai, H. Y., Dawson, B. R., Elbert, J. W., Gaisser, T. K., Green, K. D., Huang, M. A., Kieda, D. B., Ko, S., Larsen, C. G., Loh, E. C., Luo, M., Salamon, M. H., Smith, D., Sokolsky, P., Sommers, P., Stanev, T., Tang, J. K. K., Thomas, S. B., & Tilav, S.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1993-11-22
- Volume
- 71
- Issue
- 21
- Pages
- 3401-3404
- ISSN
- 0031-9007 (ISSN-L)
- OpenAlex
- W1980933674
- Cited by
- 510
- References
- 0
- FWCI
- 11.19
- Type
- journal article
- Language
- en
- Open access
- closed
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- The paper
- Bird, D. J., Corbató, S. C., Dai, H. Y., Dawson, B. R., Elbert, J. W., Gaisser, T. K., Green, K. D., Huang, M. A., Kieda, D. B., Ko, S., Larsen, C. G., Loh, E. C., Luo, M., Salamon, M. H., Smith, D., Sokolsky, P., Sommers, P., Stanev, T., Tang, J. K. K., . . . Tilav, S. (1993). Evidence for correlated changes in the spectrum and composition of cosmic rays at extremely high energies. Physical Review Letters. https://doi.org/10.1103/physrevlett.71.3401
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