Search for magnetically-induced signatures in the arrival directions of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory

THE PIERRE AUGER COLLABORATION (P. HANSEN PERTENECE A LA COLABORACION-ORDEN ALFABETICO)

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

IOP PUBLISHING LTD

Lugar: Londres; Año: 2020 p. 1 - 27

1475-7516

We search for signals of magnetically-induced eects in the arrival directionsof ultra-high-energy cosmic rays detected at the Pierre Auger Observatory. We apply twodierent methods. One is a search for sets of events that show a correlation between theirarrival direction and the inverse of their energy, which would be expected if they come fromthe same point-like source, they have the same electric charge and their deection is relativelysmall and coherent. We refer to these sets of events as \multiplets". The second method,called \thrust", is a principal axis analysis aimed to detect the elongated patterns in a regionof interest. We study the sensitivity of both methods using a benchmark simulation and weapply them to data in two dierent searches. The rst search is done assuming as sourcecandidates a list of nearby active galactic nuclei and starburst galaxies. The second is anall-sky blind search. We report the results and we nd no statistically signicant features.We discuss the compatibility of these results with the indications on the mass compositioninferred from data of the Pierre Auger Observatory.