Show document

A+ | A- | | SLO | ENG

Title: Large-scale cosmic-ray anisotropies measured by the Pierre Auger Observatory Authors: ID Roulet, Esteban (Author) ID Filipčič, Andrej (Author) ID Lundquist, Jon Paul (Author) ID Shivashankara, Shima Ujjani (Author) ID Stanič, Samo (Author) ID Vorobiov, Serguei (Author) ID Zavrtanik, Danilo (Author) ID Zavrtanik, Marko (Author), et al. Files: UHECR2024_008.pdf (2,76 MB) MD5: 7F987F99C3412F63490DF5F01B0184F0   https://doi.org/10.22323/1.484.0008   https://pos.sissa.it/484/008/pdf   This document has even more files. Complete list of files is available below. Language: English Work type: Unknown Typology: 1.08 - Published Scientific Conference Contribution Organization: UNG - University of Nova Gorica Abstract: An update of the measurements of large-scale anisotropies in the arrival directions of ultra high-energy cosmic rays detected at the Pierre Auger Observatory is presented. The established dipolar anisotropy in right ascension has now reached a significance of 6.8σ when considering all energies above 8 EeV and 5.7 σ when only considering energies between 8 and 16 EeV. The 3D dipole amplitude and direction are reconstructed in four different energy bins above 4 EeV. At energies above 8 EeV it points more than 100∘ away from the Galactic centre, providing evidence that the anisotropy observed is of extragalactic origin. An analysis allowing for both dipolar and quadrupolar anisotropies finds qualitatively similar dipole components and no significant quadrupole components. The results for the angular power spectrum are shown, demonstrating that no other statistically significant multipoles are present. The equatorial dipole components are presented down to 0.03 EeV using a trigger which has been optimized for low energies. We find no significant departures from isotropic expectations below 8 EeV, although below 2 EeV the phases appear to be consistently aligned with the right ascension of the Galactic centre. Finally, model predictions based on source emission scenarios obtained in the combined fit of spectrum and composition data above 0.6 EeV are discussed and compared with observations. Keywords: ultra-high-energy cosmic rays, Pierre Auger Observatory, large scale anisotropies Publication status: Published Publication version: Version of Record Year of publishing: 2025 Number of pages: 7 str. PID: 20.500.12556/RUNG-9933  COBISS.SI-ID: 230056195  UDC: 52 ISSN on article: 1824-8039 DOI: 10.22323/1.484.0008  NUK URN: URN:SI:UNG:REP:C4TENVL2 Publication date in RUNG: 24.03.2025 Views: 146 Downloads: 0 Metadata:    Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

Average score: (0 votes) Your score: Voting is allowed only for logged in users. Share: Hover the mouse pointer over a document title to show the abstract or click on the title to get all document metadata.

Record is a part of a proceedings

Title:	UHECR 2024, The 7th International Symposium on Ultra-High-Energy Cosmic Rays
COBISS.SI-ID:	229932291

Record is a part of a journal

Title:	Proceedings of science
Shortened title:	Pos proc. sci.
Publisher:	Sissa
ISSN:	1824-8039
COBISS.SI-ID:	20239655

Document is financed by a project

Funder:	ARIS - Slovenian Research and Innovation Agency
Project number:	P1-0031
Name:	Večglasniška astrofizika

Licences

License:	CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:	The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Files

Loading...

Back