Amplifying UHECR arrival direction information using mass estimators at the Pierre Auger Observatory

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00640403" target="_blank" >RIV/68378271:_____/25:00640403 - isvavai.cz</a>

Alternative codes found

RIV/61989592:15310/25:73635009

Result on the web

<a href="https://pos.sissa.it/484/068/pdf" target="_blank" >https://pos.sissa.it/484/068/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22323/1.484.0068" target="_blank" >10.22323/1.484.0068</a>

Result language

angličtina

Original language name

Amplifying UHECR arrival direction information using mass estimators at the Pierre Auger Observatory

Original language description

The origin of Ultra-High-Energy Cosmic Rays (UHECRs) is one of the biggest mysteries in modern astrophysics. Since UHECRs are deflected by Galactic and extragalactic magnetic fields, their arrival directions do not point to their sources. Previous analyses conducted on the arrival directions of high-energy events (E≥32EeV ) recorded by the Surface Detector of the Pierre Auger Observatory have not shown significant anisotropies. The largest excess found in the first 19 years of data - at the 4.0σ level - is in the region around Centaurus A, and it is also the driving force of a correlation of UHECR arrival directions with a catalog of Starburst Galaxies, which is at the 3.8σ level. Since UHECRs are mostly nuclei, the lightest ones (least charged) are also the least deflected. While the mass of the events can be estimated better using the Fluorescence Detector of the Pierre Auger Observatory, the Surface Detector provides the necessary statistics needed for astrophysical studies. The introduction of novel mass-estimation techniques, such as machine learning models and an algorithm based on air-shower universality, will help identify high-rigidity events in the Surface Detector data of the Pierre Auger Observatory. With this work, we present how event-per-event mass estimators can help enhance the sensitivity in the search for anisotropies in the arrival directions of UHECRs at small and intermediate angular scales using simulations.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10303 - Particles and field physics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Article name in the collection

Proceedings of Science

ISBN

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ISSN

1824-8039

e-ISSN

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Number of pages

8

Pages from-to

068

Publisher name

Sissa Medilab srl

Place of publication

Trieste

Event location

Malargüe

Event date

Nov 17, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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