Correlation of the highest energy cosmic rays with nearby extragalactic objects

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Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrate that there is a correlation between the arrival directions of cosmic rays with energy above {approx} 6 x 10{sup 19} eV and the positions of active galactic nuclei (AGN) lying within {approx} 75 Mpc. We reject the hypothesis of an isotropic distribution of these cosmic rays at over 99% confidence level from a prescribed a priori test. The correlation we observe is compatible with the hypothesis that the highest energy particles originate from nearby extragalactic sources whose flux has not been significantly reduced by interaction ... continued below

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22 pages

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Abraham, J.; Abreu, P.; Aglietta, M.; Aguirre, C.; Allard, D.; Allekotte, I. et al. November 1, 2007.

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Description

Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrate that there is a correlation between the arrival directions of cosmic rays with energy above {approx} 6 x 10{sup 19} eV and the positions of active galactic nuclei (AGN) lying within {approx} 75 Mpc. We reject the hypothesis of an isotropic distribution of these cosmic rays at over 99% confidence level from a prescribed a priori test. The correlation we observe is compatible with the hypothesis that the highest energy particles originate from nearby extragalactic sources whose flux has not been significantly reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources.

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22 pages

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  • Journal Name: Science 318:938-943,2007; Journal Volume: 318

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  • Report No.: FERMILAB-PUB-07-579-AD-CD-E-TD
  • Grant Number: AC02-07CH11359
  • DOI: 10.1126/science.1151124 | External Link
  • Office of Scientific & Technical Information Report Number: 922304
  • Archival Resource Key: ark:/67531/metadc893725

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • November 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • July 26, 2017, 9:42 a.m.

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Abraham, J.; Abreu, P.; Aglietta, M.; Aguirre, C.; Allard, D.; Allekotte, I. et al. Correlation of the highest energy cosmic rays with nearby extragalactic objects, article, November 1, 2007; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc893725/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.