Techniques for searching for anisotropy in the arrival directions of ultra-high energy cosmic rays

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A90232%2F25%3A00641985" target="_blank" >RIV/68378271:90232/25:00641985 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s13538-024-01640-6" target="_blank" >https://doi.org/10.1007/s13538-024-01640-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s13538-024-01640-6" target="_blank" >10.1007/s13538-024-01640-6</a>

Result language

angličtina

Original language name

Techniques for searching for anisotropy in the arrival directions of ultra-high energy cosmic rays

Original language description

Understanding the origin and distribution of ultra-high-energy cosmic rays (UHECRs) remains a cornerstone challenge in astrophysics. These cosmic rays, with energies exceeding 8 EeV, provide insights into the most energetic phenomena in the universe. In this paper, we review and apply various statistical and analytical techniques to a simulated dataset to investigate the anisotropy in the arrival directions of UHECRs with energies exceeding 8 EeV. We simulate cosmic-ray events based on the distribution of local matter from the 2MASS Redshift Survey, supplemented with an isotropic background component, to create a robust dataset for analysis. Our methods include blind searches for excesses over the sky, Rayleigh analysis in right ascension, reconstruction of dipole and quadrupole moments using spherical harmonics, and the angular power spectrum technique — a method extensively utilized in cosmic microwave background studies — to assess anisotropies across multiple angular scales. The results underscore the potential of these methodologies to reveal significant anisotropies and contribute to our understanding of the possible extragalactic sources and propagation mechanisms of UHECRs.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10303 - Particles and field physics

Project

—

Continuities

—

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Brazilian Journal of Physics

ISSN

0103-9733

e-ISSN

1678-4448

Volume of the periodical

55

Issue of the periodical within the volume

1

Country of publishing house

BR - BRAZIL

Number of pages

8

Pages from-to

9

UT code for WoS article

001351523500001

EID of the result in the Scopus database

2-s2.0-85209821969