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

VERGARA QUISPE, I.D.; PIERRE AUGER COLLABORATION

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

IOP PUBLISHING LTD

Año: 2020 vol. 2020 p. 17 - 17

1475-7516

We search for signals of magnetically-induced effects in the arrival directions of ultra-high-energy cosmic rays detected at the Pierre Auger Observatory. We apply two different methods. One is a search for sets of eventsthat show a correlation between their arrival direction and the inverse oftheir energy, which would be expected if they come from the same point-likesource, they have the same electric charge and their deflection is relativelysmall and coherent. We refer to these sets of events as "multiplets". Thesecond method, called "thrust", is a principal axis analysis aimed to detectthe elongated patterns in a region of interest. We study the sensitivity ofboth methods using a benchmark simulation and we apply them to data in twodifferent searches. The first search is done assuming as source candidates alist of nearby active galactic nuclei and starburst galaxies. The second is anall-sky  blind search. We report the results and we find no statisticallysignificant features. We discuss the compatibility of these results with the indications on the mass composition inferred from data of the Pierre AugerObservatory.