Astrophysical models to interpret the Pierre Auger Observatory data

González, Juan Manuel; Filipčič, Andrej; Lundquist, Jon Paul; Shivashankara, Shima Ujjani; Stanič, Samo; Vorobiov, Serguei; Zavrtanik, Danilo; Zavrtanik, Marko

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Naslov:	Astrophysical models to interpret the Pierre Auger Observatory data
Avtorji:	ID González, Juan Manuel (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:	https://pos.sissa.it/484/015 UHECR2024_015.pdf (790,55 KB) MD5: 7ADC137BA05D0682186EB88A687A99BA https://doi.org/10.22323/1.484.0015 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:	The Pierre Auger Observatory has measured the spectrum of ultra-high-energy cosmic rays with unprecedented precision, as well as the distribution of the depths of the maximum of the shower development in the atmosphere, which provide a reliable estimator of the mass composition. The measurements above 10[sup]17.8 eV can be interpreted assuming two populations of uniformly distributed sources, one with a soft spectrum dominating the flux below few EeV, and another one with a very hard spectrum dominating above that energy. When considering the presence of intense extragalactic magnetic fields between our Galaxy and the closest sources and a high-energy population with low spatial density, a magnetic horizon appears, suppressing the cosmic ray's flux at low-energies, which could explain the very hard spectrum observed at Earth. The distribution of arrival directions, which at energies above 32 EeV shows indications of a correlation with a population of starburst galaxies or the radio galaxy Centaurus A (Cen A), are also important to constrain the sources. It is shown that adding a fractional contribution from these sources of about 20% on top of an homogeneous background leads to an improvement of the model likelihood.
Ključne besede:	ultra-high-energy cosmic rays, UHECR energy spectrum, UHECR mass composition, UHECR anisotropies, UHECR propagation, UHECR data interpretation, extragalactic magnetic fields, starburst galaxies, Centaurus A, Pierre Auger Observatory
Status publikacije:	Objavljeno
Verzija publikacije:	Objavljena publikacija
Leto izida:	2025
Št. strani:	8 str.
PID:	20.500.12556/RUNG-9934
COBISS.SI-ID:	230054147
UDK:	539.1
ISSN pri članku:	1824-8039
DOI:	10.22323/1.484.0015
NUK URN:	URN:SI:UNG:REP:RR1KSIWM
Datum objave v RUNG:	24.03.2025
Število ogledov:	144
Število prenosov:	0
Metapodatki:
:	GONZÁLEZ, Juan Manuel, FILIPČIČ, Andrej, LUNDQUIST, Jon Paul, SHIVASHANKARA, Shima Ujjani, STANIČ, Samo, VOROBIOV, Serguei, ZAVRTANIK, Danilo in ZAVRTANIK, Marko, 2025, Astrophysical models to interpret the Pierre Auger Observatory data. V : UHECR 2024, The 7th International Symposium on Ultra-High-Energy Cosmic Rays [na spletu]. Objavljeni znanstveni prispevek na konferenci. 2025. [Dostopano 30 marec 2025]. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=9934 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:	ARRS - Agencija za raziskovalno 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
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