INVESTIGADORES
BONIFAZI Carla Brenda
artículos
Título:
Observation of a Large-scale Anisotropy in the Arrival Directions of Cosmic Rays above 8×10^18 eV
Autor/es:
PIERRE AUGER COLLABORATION; C. BONIFAZI
Revista:
SCIENCE
Editorial:
AMER ASSOC ADVANCEMENT SCIENCE
Referencias:
Año: 2017
ISSN:
0036-8075
Resumen:
Cosmic rays are atomic nuclei arriving from outer space that reach thehighest energies observed in nature. Clues to their origin come from studyingthe distribution of their arrival directions. Using 3×104 cosmic raysabove 8×1018 electron volts, recorded with the Pierre AugerObservatory from a total exposure of 76,800 square kilometers steradian year,we report an anisotropy in the arrival directions. The anisotropy, detected atmore than the 5.2σ level of significance, can be described by a dipolewith an amplitude of 6.5+1.3−0.9% towards right ascension αd=100±10 degrees and declination δd=−24+12−13 degrees.That direction indicates an extragalactic origin for these ultra-high energyparticles.
