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Abstract:

Cosmic rays are atomic nuclei arriving from outer space that reach the highest energies observed in nature. Clues to their origin come from studying the distribution of their arrival directions. Using 3 × 10 4 cosmic rays with energies above 8 × 101 8 electron volts, recorded with the Pierre Auger Observatory from a total exposure of 76,800 km 2 sr year, we determined the existence of anisotropy in arrival directions. The anisotropy, detected at more than a 5.2σ level of significance, can be described by a dipole with an amplitude of 6.5+ 1.3 -0.9 percent toward right ascension α d = 100 ± 10 degrees and declination δ d = -24 +12 -13 degrees. That direction indicates an extragalactic origin for these ultrahighenergy particles.

Registro:

Documento: Artículo
Título:Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
Autor:Aab, A. et al.
Este artículo contiene 406 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 406 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:amplitude; anisotropy; arrival time; cosmic ray; electron; observational method; anisotropy; Article; astronomy; cosmic radiation; dipole; electron; energy; fluorescence; magnetic field; priority journal; space
Año:2017
Volumen:357
Número:6357
Página de inicio:1266
Página de fin:1270
DOI: http://dx.doi.org/10.1126/science.aan4338
Título revista:Science
Título revista abreviado:Science
ISSN:00368075
CODEN:SCIEA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00368075_v357_n6357_p1266_Aab

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Citas:

---------- APA ----------
(2017) . Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV. Science, 357(6357), 1266-1270.
http://dx.doi.org/10.1126/science.aan4338
---------- CHICAGO ----------
Aab, A. "Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV" . Science 357, no. 6357 (2017) : 1266-1270.
http://dx.doi.org/10.1126/science.aan4338
---------- MLA ----------
Aab, A. "Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV" . Science, vol. 357, no. 6357, 2017, pp. 1266-1270.
http://dx.doi.org/10.1126/science.aan4338
---------- VANCOUVER ----------
Aab, A. Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV. Science. 2017;357(6357):1266-1270.
http://dx.doi.org/10.1126/science.aan4338