Large-scale cosmic-ray anisotropies measured by the Pierre Auger Observatory

Roulet, Esteban; Filipčič, Andrej; Lundquist, Jon Paul; Shivashankara, Shima Ujjani; Stanič, Samo; Vorobiov, Serguei; Zavrtanik, Danilo; Zavrtanik, Marko

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Naslov:	Large-scale cosmic-ray anisotropies measured by the Pierre Auger Observatory
Avtorji:	ID Roulet, Esteban (Avtor) ID Filipčič, Andrej (Avtor) ID Lundquist, Jon Paul (Avtor) ID Shivashankara, Shima Ujjani (Avtor) ID Stanič, Samo (Avtor) ID Vorobiov, Serguei (Avtor) ID Zavrtanik, Danilo (Avtor) ID Zavrtanik, Marko (Avtor), et al.
Datoteke:	UHECR2024_008.pdf (2,76 MB) MD5: 7F987F99C3412F63490DF5F01B0184F0 https://doi.org/10.22323/1.484.0008 https://pos.sissa.it/484/008/pdf To gradivo ima še več datotek. Celoten seznam je na voljo spodaj.
Jezik:	Angleški jezik
Vrsta gradiva:	Neznano
Tipologija:	1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija:	UNG - Univerza v Novi Gorici
Opis:	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.
Ključne besede:	ultra-high-energy cosmic rays, Pierre Auger Observatory, large scale anisotropies
Status publikacije:	Objavljeno
Verzija publikacije:	Objavljena publikacija
Leto izida:	2025
Št. strani:	7 str.
PID:	20.500.12556/RUNG-9933
COBISS.SI-ID:	230056195
UDK:	52
ISSN pri članku:	1824-8039
DOI:	10.22323/1.484.0008
NUK URN:	URN:SI:UNG:REP:C4TENVL2
Datum objave v RUNG:	24.03.2025
Število ogledov:	125
Število prenosov:	0
Metapodatki:
:	ROULET, Esteban, FILIPČIČ, Andrej, LUNDQUIST, Jon Paul, SHIVASHANKARA, Shima Ujjani, STANIČ, Samo, VOROBIOV, Serguei, ZAVRTANIK, Danilo in ZAVRTANIK, Marko, 2025, Large-scale cosmic-ray anisotropies measured by the Pierre Auger Observatory. V : UHECR 2024, The 7th International Symposium on Ultra-High-Energy Cosmic Rays [na spletu]. Objavljeni znanstveni prispevek na konferenci. 2025. [Dostopano 29 marec 2025]. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=9933 Kopiraj citat

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Gradivo je del zbornika

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

Gradivo je del revije

Naslov:	Proceedings of science
Skrajšan naslov:	Pos proc. sci.
Založnik:	Sissa
ISSN:	1824-8039
COBISS.SI-ID:	20239655

Gradivo je financirano iz projekta

Financer:	ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:	P1-0031
Naslov:	Večglasniška astrofizika

Licence

Licenca:	CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna

Povezava:	http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:	Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.