New estimation of the spectral index of high-energy cosmic rays as determined by the Compton-Getting anisotropy
Collaboration
11 pages
Published in:
- Astrophys.J.Lett. 672 (2008) L53
e-Print:
- 0711.2002 [astro-ph]
DOI:
Experiments:
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Abstract: (arXiv)
The amplitude of the Compton-Getting (CG) anisotropy contains the power-law index of the cosmic-ray energy spectrum. Based on this relation and using the Tibet air-shower array data, we measure the cosmic-ray spectral index to be between 6 TeV and 40 TeV, consistent with 2.7 from direct energy spectrum measurements. Potentially, this CG anisotropy analysis can be utilized to confirm the astrophysical origin of the ``knee'' against models for non-standard hadronic interactions in the atmosphere.Note:
- Submitted to Astrophys.J.Lett. •
- accepted to ApJL
- cosmic rays
- solar system: general
- cosmic radiation: anisotropy
- cosmic radiation: energy spectrum
- cosmic radiation: flux
- time dependence
- shower detector: experimental results
References(12)
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