Discovery of localized regions of excess 10-TeV cosmic rays

A. A. Abdo, B. Allen, T. Aune, D. Berley, E. Blaufuss, S. Casanova, C. Chen, B. L. Dingus, R. W. Ellsworth, L. Fleysher, R. Fleysher, M. M. Gonzalez, J. A. Goodman, C. M. Hoffman, P. H. Hüntemeyer, B. E. Kolterman, C. P. Lansdell, J. T. Linnemann, J. E. McEnery, A. I. Mincer & 13 others P. Nemethy, D. Noyes, J. Pretz, J. M. Ryan, P. M Saz Parkinson, A. Shoup, G. Sinnis, A. J. Smith, G. W. Sullivan, V. Vasileiou, G. P. Walker, D. A. Williams, G. B. Yodh

    Research output: Contribution to journalArticle

    Abstract

    The 7 year data set of the Milagro TeV observatory contains 2.2×1011 events of which most are due to hadronic cosmic rays. These data are searched for evidence of intermediate scale structure. Excess emission on angular scales of ∼10° has been found in two localized regions of unknown origin with greater than 12σ significance. Both regions are inconsistent with pure 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 4.6σ, and it is consistent with hard spectrum protons with an exponential cutoff, with the most significant excess at ∼10TeV. Potential causes of these excesses are explored, but no compelling explanations are found.

    Original languageEnglish (US)
    Article number221101
    JournalPhysical Review Letters
    Volume101
    Issue number22
    DOIs
    StatePublished - Nov 24 2008

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    cosmic rays
    confidence
    observatories
    energy spectra
    cut-off
    gamma rays
    protons
    causes

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Abdo, A. A., Allen, B., Aune, T., Berley, D., Blaufuss, E., Casanova, S., ... Yodh, G. B. (2008). Discovery of localized regions of excess 10-TeV cosmic rays. Physical Review Letters, 101(22), [221101]. https://doi.org/10.1103/PhysRevLett.101.221101

    Discovery of localized regions of excess 10-TeV cosmic rays. / Abdo, A. A.; Allen, B.; Aune, T.; Berley, D.; Blaufuss, E.; Casanova, S.; Chen, C.; Dingus, B. L.; Ellsworth, R. W.; Fleysher, L.; Fleysher, R.; Gonzalez, M. M.; Goodman, J. A.; Hoffman, C. M.; Hüntemeyer, P. H.; Kolterman, B. E.; Lansdell, C. P.; Linnemann, J. T.; McEnery, J. E.; Mincer, A. I.; Nemethy, P.; Noyes, D.; Pretz, J.; Ryan, J. M.; Parkinson, P. M Saz; Shoup, A.; Sinnis, G.; Smith, A. J.; Sullivan, G. W.; Vasileiou, V.; Walker, G. P.; Williams, D. A.; Yodh, G. B.

    In: Physical Review Letters, Vol. 101, No. 22, 221101, 24.11.2008.

    Research output: Contribution to journalArticle

    Abdo, AA, Allen, B, Aune, T, Berley, D, Blaufuss, E, Casanova, S, Chen, C, Dingus, BL, Ellsworth, RW, Fleysher, L, Fleysher, R, Gonzalez, MM, Goodman, JA, Hoffman, CM, Hüntemeyer, PH, Kolterman, BE, Lansdell, CP, Linnemann, JT, McEnery, JE, Mincer, AI, Nemethy, P, Noyes, D, Pretz, J, Ryan, JM, Parkinson, PMS, Shoup, A, Sinnis, G, Smith, AJ, Sullivan, GW, Vasileiou, V, Walker, GP, Williams, DA & Yodh, GB 2008, 'Discovery of localized regions of excess 10-TeV cosmic rays', Physical Review Letters, vol. 101, no. 22, 221101. https://doi.org/10.1103/PhysRevLett.101.221101
    Abdo AA, Allen B, Aune T, Berley D, Blaufuss E, Casanova S et al. Discovery of localized regions of excess 10-TeV cosmic rays. Physical Review Letters. 2008 Nov 24;101(22). 221101. https://doi.org/10.1103/PhysRevLett.101.221101
    Abdo, A. A. ; Allen, B. ; Aune, T. ; Berley, D. ; Blaufuss, E. ; Casanova, S. ; Chen, C. ; Dingus, B. L. ; Ellsworth, R. W. ; Fleysher, L. ; Fleysher, R. ; Gonzalez, M. M. ; Goodman, J. A. ; Hoffman, C. M. ; Hüntemeyer, P. H. ; Kolterman, B. E. ; Lansdell, C. P. ; Linnemann, J. T. ; McEnery, J. E. ; Mincer, A. I. ; Nemethy, P. ; Noyes, D. ; Pretz, J. ; Ryan, J. M. ; Parkinson, P. M Saz ; Shoup, A. ; Sinnis, G. ; Smith, A. J. ; Sullivan, G. W. ; Vasileiou, V. ; Walker, G. P. ; Williams, D. A. ; Yodh, G. B. / Discovery of localized regions of excess 10-TeV cosmic rays. In: Physical Review Letters. 2008 ; Vol. 101, No. 22.
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    AU - Sullivan, G. W.

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