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

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

Pierre Auger

Collaboration

Apr 22, 2020

27 pages

Published in:

JCAP 06 (2020) 017

Published: Jun 8, 2020

e-Print:

2004.10591 [astro-ph.HE]

DOI:

10.1088/1475-7516/2020/06/017

Report number:

FERMILAB-PUB-20-177-E-TD

Experiments:

AUGER

View in:

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Abstract: (IOP)

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 events that show a correlation between their arrival direction and the inverse of their energy, which would be expected if they come from the same point-like source, they have the same electric charge and their deflection is relatively small 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 region of interest. We study the sensitivity of both methods using a benchmark simulation and we apply them to data in two different searches. The first search is done assuming as source candidates a list of nearby active galactic nuclei and starburst galaxies. The second is an all-sky blind search. We report the results and we find no statistically significant features. We discuss the compatibility of these results with the indications on the mass composition inferred from data of the Pierre Auger Observatory.

Note:

Submitted for publication in JCAP

cosmic radiation: UHE
cosmic radiation: acceleration
charge: electric
observatory
Auger
mass spectrum
magnetic field
correlation
helium: nucleus
flux

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