INVESTIGADORES
MELO Diego Gabriel
artículos
Título:
Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
Autor/es:
THE PIERRE AUGER COLLABORATION; D. MELO
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2022
ISSN:
0004-637X
Resumen:
A promising energy range to look for angular correlations between cosmic rays of extragalactic origin and their sources is at the highest energies, above a few tens of EeV (1 EeV = 10**18 eV). Despite the flux of these particles being extremely low, the area of around 3000 km2 covered at the Pierre Auger Observatory, and the 17 yr data-taking period of the Phase 1 of its operations, have enabled us to measure the arrival directions of more than 2600 ultrahigh-energy cosmic rays above 32 EeV. We publish this data set, the largest available at such energies from an integrated exposure of 122,000 km2 sr yr, and search it for anisotropies over the 3.4 Pi steradians covered with the Observatory. Evidence for a deviation in excess of isotropy at intermediate angular scales, with around 15° Gaussian spread or around 25° top-hat radius, is obtained at the 4 Sigmas significance level for cosmic-ray energies above around 40 EeV.