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An excess of cosmic ray electrons at energies of 300–800 GeV

Author

Listed:
  • J. Chang

    (Purple Mountain Observatory, CAS, 2 West Beijing Road, Nanjing 210008, China
    Max Planck Institute for Solar System Research, 2 Max Planck-Strasse, Katlenburg-Lindau 37191, Germany)

  • J. H. Adams

    (Marshall Space Flight Center, Huntsville, Alabama 35812, USA)

  • H. S. Ahn

    (University of Maryland, Institute for Physical Science & Technology, College Park, Maryland 20742, USA)

  • G. L. Bashindzhagyan

    (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie gory, GSP1, Moscow 119991, Russia)

  • M. Christl

    (Marshall Space Flight Center, Huntsville, Alabama 35812, USA)

  • O. Ganel

    (University of Maryland, Institute for Physical Science & Technology, College Park, Maryland 20742, USA)

  • T. G. Guzik

    (Louisiana State University, Baton Rouge, Louisiana 70803, USA)

  • J. Isbert

    (Louisiana State University, Baton Rouge, Louisiana 70803, USA)

  • K. C. Kim

    (University of Maryland, Institute for Physical Science & Technology, College Park, Maryland 20742, USA)

  • E. N. Kuznetsov

    (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie gory, GSP1, Moscow 119991, Russia)

  • M. I. Panasyuk

    (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie gory, GSP1, Moscow 119991, Russia)

  • A. D. Panov

    (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie gory, GSP1, Moscow 119991, Russia)

  • W. K. H. Schmidt

    (Max Planck Institute for Solar System Research, 2 Max Planck-Strasse, Katlenburg-Lindau 37191, Germany)

  • E. S. Seo

    (University of Maryland, Institute for Physical Science & Technology, College Park, Maryland 20742, USA)

  • N. V. Sokolskaya

    (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie gory, GSP1, Moscow 119991, Russia)

  • J. W. Watts

    (Marshall Space Flight Center, Huntsville, Alabama 35812, USA)

  • J. P. Wefel

    (Louisiana State University, Baton Rouge, Louisiana 70803, USA)

  • J. Wu

    (University of Maryland, Institute for Physical Science & Technology, College Park, Maryland 20742, USA)

  • V. I. Zatsepin

    (Skobeltsyn Institute of Nuclear Physics, Moscow State University, Leninskie gory, GSP1, Moscow 119991, Russia)

Abstract

High-energy cosmic rays The ATIC (Advanced Thin Ionizaton Calorimeter) cosmic-ray astronomy experiment sends helium balloons to altitudes of 35 km and more above Antarctica for up to 15 days at a time. These forays to the edge of space have resulted in the detection of an excess of Galactic cosmic-ray electrons at energies of around 300–800 GeV, which indicates a nearby source of energetic electrons. The source could be an unseen astrophysical object that accelerates electrons to those energies, or the electrons could arise from the annihilation of 'Kaluza-Klein' dark matter, an exotic concept predicted by theories of the Universe involving compactified extra dimensions.

Suggested Citation

  • J. Chang & J. H. Adams & H. S. Ahn & G. L. Bashindzhagyan & M. Christl & O. Ganel & T. G. Guzik & J. Isbert & K. C. Kim & E. N. Kuznetsov & M. I. Panasyuk & A. D. Panov & W. K. H. Schmidt & E. S. Seo , 2008. "An excess of cosmic ray electrons at energies of 300–800 GeV," Nature, Nature, vol. 456(7220), pages 362-365, November.
    • Handle: RePEc:nat:nature:v:456:y:2008:i:7220:d:10.1038_nature07477
    DOI: 10.1038/nature07477
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