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          Institute: MPI für Kernphysik     Collection: High-Energy Astrophysics     Display Documents

ID: 359026.0, MPI für Kernphysik / High-Energy Astrophysics
Discovery of Localized Regions of Excess 10-TeV Cosmic Ray
Authors:Abdo, A. A.; Allen, B. T.; Aune, T.; Berley, D.; Blaufuss, E.; Casanova, S.; Chen, C.; Dingus, B. L.; Ellsworth, R. W.; Gonzalez, M. M.; Goodman, J. A.; Prez, J.; Hoffman, C. M.; Hopper, B.; Hüntemeyer, P. H.; Kolterman, B. E.; Landsdell, C. P.; Linnemann, J. T.; McEnery, J. E.; Mincer, A. I.; Nemethy, P.; Noyes, D.; Ryan, J. M.; Saz-Parkinson, P. M.; Shoup, A.; Sinnis, G.; Smith, A. J.; Sullivan, G. W.; Vasileiou, V.; Walker, G. P.; Williams, D. A.; Xu, X. W.; Yodh, G. B.; Fleysher, L.; Fleysher, R.
Title of Journal:Physical Review Letters
Review Status:not specified
Audience:Experts Only
Abstract / Description: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.
External Publication Status:submitted
Document Type:Article
Affiliations:MPI für Kernphysik/Group of W. Hofmann/High Energy Astrophysics (F. Aharonian)
External Affiliations:Department of Physics and Astronomy, Michigan
State University, 3245 BioMedical Physical Sciences Building, East Lansing, MI 48824
Department of Physics and Astronomy,
University of California, Irvine, CA 92697
Santa Cruz Institute for Particle Physics,
University of California, 1156 High Street, Santa Cruz, CA 95064
Department of Physics, University of Maryland, College Park, MD 20742 Group P-23, Los Alamos National Laboratory,
P.O. Box 1663, Los Alamos, NM 87545
Department of Physics and Astronomy,
George Mason University, 4400 University Drive, Fairfax, VA 22030
Instituto de Astronomia, Universidad Nacional Autónoma de México, D.F., México, 04510
Current address: High Energy Physics
Division, Argonne National Laboratory, Argonne, IL 60439 and Enrico Fermi Institute, University of Chicago, Chicago, IL 60637
Department of Physics, New York University, 4
Washington Place, New York, NY 10003
NASA Goddard Space Flight Center,
Greenbelt, MD 20771
Department of Physics, University of New
Hampshire, Morse Hall, Durham, NH 03824 Current address: Office of Science and Engineering Laboratories, Center for Devices and Radiological
Health, U.S. Food and Drug Administration
Ohio State University, Lima, OH 45804
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