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Recent Results from the Pierre Auger Observatory

Recent Results from the Pierre Auger Observatory. Marcelo Augusto Leigui de Oliveira leigui@ufabc.edu.br. II Argentinian -Brazilian Meeting on Gravitation, Astrophysics and Cosmology Buenos Aires, 22-25 April, 2014 . GZK ~ 5×10 10 GeV. 2 nd knee ~ 4 ×10 8 GeV. 1 st knee

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Recent Results from the Pierre Auger Observatory

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  1. Recent Results from the Pierre Auger Observatory Marcelo Augusto Leiguide Oliveira leigui@ufabc.edu.br II Argentinian-Brazilian Meeting on Gravitation, Astrophysics and CosmologyBuenos Aires, 22-25 April, 2014

  2. GZK ~ 5×1010 GeV 2nd knee ~ 4×108 GeV 1st knee ~ 3×106 GeV ankle ~ 5×109 GeV

  3. CMB: A. A. Penzias and R. Wilson, Astroph. J., 142 (1965) 419 K. Greisen, Phys. Rev. Lett., 16 (1966) 748G. T. Zatsepin, V. A. Kuz'min, Pis'ma Zh. Eksp. Theor. Fiz. 4 (1966) 53 The GZK Cutoff

  4. Powerful cosmic engines • Nuclear fusion: 1.4 x 10-12 /mpc2 ≈ 0.01 rest energy of matter (Lʘ = 3.8 x 1026 W) • Crab: contains a spinning compact object (L ≈ 1031 W) • X-ray sources: binary stars (L ≈ 1031 W) • Quasars / Active Galactic Nuclei (AGNs): L ≈ 1040 W

  5. Surface Detector: 1660 stations Fluorescence Detector: 27 telescopes 3.000 km2

  6. First concepts 1991 Site Selection 1995 Ground breaking March 1999 First events 2000 Prototype running 2001 Full Southern Site 2008 Upgrades 2010 ++

  7. RESULTS

  8. UHECR spectrum

  9. (a) Photonshower (b) Protonshower (c) Ironshower

  10. Upperlimitson UHE photons

  11. Anisotropy

  12. Largescaleanisotropy

  13. Neutrino inducedshowers

  14. Neutrino inducedshowers

  15. Primarycomposition

  16. Primarycomposition EAS front radius of curvature Rc as a mass sensitive parameter

  17. p-Aircrosssectionat 57 TeV

  18. p-Aircrosssectionat 57 TeV

  19. Muonexcessandhadronicinteractions

  20. MuchasGracias! Marcelo Augusto Leiguide Oliveira leigui@ufabc.edu.br II Argentinian-Brazilian Meeting on Gravitation, Astrophysics and CosmologyBuenos Aires, 22-25 April, 2014

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