Large-scale cosmic-ray anisotropies above 4 EeV measured by the Pierre Auger observatory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00499841" target="_blank" >RIV/68378271:_____/18:00499841 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/18:10390632 RIV/61989592:15310/18:73590441

Výsledek na webu

<a href="https://doi.org/10.3847/1538-4357/aae689" target="_blank" >https://doi.org/10.3847/1538-4357/aae689</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/aae689" target="_blank" >10.3847/1538-4357/aae689</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large-scale cosmic-ray anisotropies above 4 EeV measured by the Pierre Auger observatory

Popis výsledku v původním jazyce

We present a detailed study of the large-scale anisotropies of cosmic rays with energies above 4 EeV measured using the Pierre Auger Observatory. For the energy bins [4, 8] EeV and E >= 8 EeV, the most significant signal is a dipolar modulation in R.A. at energies above 8 EeV, as previously reported. In this paper we further scrutinize the highest-energy bin by splitting it into three energy ranges. We find that the amplitude of the dipole increases with energy above 4 EeV. The growth can be fitted with a power law with index beta = 0.79 +/- 0.19. The directions of the dipoles are consistent with an extragalactic origin of these anisotropies at all the energies considered. Additionally, we have estimated the quadrupolar components of the anisotropy: they are not statistically significant. We discuss the results in the context of the predictions from different models for the distribution of ultrahigh-energy sources and cosmic magnetic fields.n

Název v anglickém jazyce

Large-scale cosmic-ray anisotropies above 4 EeV measured by the Pierre Auger observatory

Popis výsledku anglicky

We present a detailed study of the large-scale anisotropies of cosmic rays with energies above 4 EeV measured using the Pierre Auger Observatory. For the energy bins [4, 8] EeV and E >= 8 EeV, the most significant signal is a dipolar modulation in R.A. at energies above 8 EeV, as previously reported. In this paper we further scrutinize the highest-energy bin by splitting it into three energy ranges. We find that the amplitude of the dipole increases with energy above 4 EeV. The growth can be fitted with a power law with index beta = 0.79 +/- 0.19. The directions of the dipoles are consistent with an extragalactic origin of these anisotropies at all the energies considered. Additionally, we have estimated the quadrupolar components of the anisotropy: they are not statistically significant. We discuss the results in the context of the predictions from different models for the distribution of ultrahigh-energy sources and cosmic magnetic fields.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

—

Svazek periodika

868

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

000450221800004

EID výsledku v databázi Scopus

2-s2.0-85057212039