Discovery of Localized Regions of Excess 10-TeV Cosmic Rays
Astrophysics
2008-12-18 v3
Abstract
An analysis of 7 years of Milagro data performed on a 10-degree angular scale has found two localized regions of excess of unknown origin with greater than 12 sigma significance. Both regions are inconsistent with gamma-ray emission with high confidence. One of the regions has a different energy spectrum than the isotropic cosmic-ray flux at a level of 4.6 sigma, and it is consistent with hard spectrum protons with an exponential cutoff, with the most significant excess at ~10 TeV. Potential causes of these excesses are explored, but no compelling explanations are found.
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Cite
@article{arxiv.0801.3827,
title = {Discovery of Localized Regions of Excess 10-TeV Cosmic Rays},
author = {A. A. Abdo and B. Allen and T. Aune and D. Berley and E. Blaufuss and S. Casanova and C. Chen and B. L. Dingus and R. W. Ellsworth and L. Fleysher and R. Fleysher and M. M. Gonzales and J. A. Goodman and C. M. Hoffman and P. H. Hüntemeyer and B. E. Kolterman and C. P. Lansdell and J. T. Linnemann and J. E. McEnery and A. I. Mincer and P. Nemethy and D. Noyes and J. Pretz and J. M. Ryan and P. M. Saz Parkinson and A. Shoup and G. Sinnis and A. J. Smith and G. W. Sullivan and V. Vasileiou and G. P. Walker and D. A. Williams and G. B. Yodh},
journal= {arXiv preprint arXiv:0801.3827},
year = {2008}
}
Comments
Submitted to PhysRevLett