BECAS
VERGARA QUISPE Indira Dajhana
artículos
Título:
Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
Autor/es:
VERGARA QUISPE, I. D.; PIERRE AUGER COLLABORATION
Revista:
SCIENCE
Editorial:
AMER ASSOC ADVANCEMENT SCIENCE
Referencias:
Año: 2017 vol. 357 p. 1266 - 1270
ISSN:
0036-8075
Resumen:
Cosmic rays are atomic nuclei arriving from outer space that reach the highest 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 Auger Observatory 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 energy particles.
