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Naslov:Scrutinizing FR 0 radio galaxies as ultra-high-energy cosmic ray source candidates
Avtorji:ID Merten, Lukas (Avtor)
ID Boughelilba, Margot (Avtor)
ID Reimer, Anita (Avtor)
ID Da Vela, Paolo (Avtor)
ID Vorobiov, Serguei (Avtor)
ID Tavecchio, Fabrizio (Avtor)
ID Bonnoli, Giacomo (Avtor)
ID Lundquist, Jon Paul (Avtor)
ID Righi, Chiara (Avtor)
Datoteke: Gradivo nima datotek, ki so prostodostopne za javnost. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Neznano
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Fanaroff-Riley (FR) 0 radio galaxies compose a new class of radio galaxies, which are usually weaker but much more numerous than the well-established class of FR 1 and FR 2 galaxies. The latter classes have been proposed as sources of the ultra-high-energy cosmic rays (UHECRs) with energies reaching up to eV. Based on this conjecture, the possibility of UHECR acceleration and survival in an FR 0 source environment is examined in this work. In doing so, an average spectral energy distribution (SED) based on data from the FR 0 catalog (FR0CAT) is compiled. The resulting photon fields are used as targets for UHECRs, which suffer from electromagnetic pair production, photo-disintegration, photo-meson production losses, and synchrotron radiation. Multiple mechanisms are discussed to assess the UHECR acceleration probability, including Fermi-I order and gradual shear accelerations, and particle escape from the source region. This work shows that in a hybrid scenario, combining Fermi and shear accelerations, FR 0 galaxies can contribute to the observed UHECR flux, as long as where shear acceleration starts to dominate over escape. Even in less optimistic scenarios, FR 0s can be expected to contribute to the cosmic-ray flux between the knee and the ankle. Our results are relatively robust with respect to the realized magnetic turbulence model and the speed of the accelerating shocks.
Ključne besede:acceleration of particles, nonthermal radiation mechanisms, jets, active galaxies, cosmic rays
Leto izida:2021
Št. strani:str. 1-48
Številčenje:Vol. , 1
PID:20.500.12556/RUNG-6250 Novo okno
COBISS.SI-ID:50457091 Novo okno
UDK:539.1
ISSN pri članku:0927-6505
DOI:10.1016/j.astropartphys.2021.102564 Novo okno
NUK URN:URN:SI:UNG:REP:P8FF0HZC
Datum objave v RUNG:05.02.2021
Število ogledov:3976
Število prenosov:0
Metapodatki:XML DC-XML DC-RDF
:
MERTEN, Lukas, BOUGHELILBA, Margot, REIMER, Anita, DA VELA, Paolo, VOROBIOV, Serguei, TAVECCHIO, Fabrizio, BONNOLI, Giacomo, LUNDQUIST, Jon Paul in RIGHI, Chiara, 2021, Scrutinizing FR 0 radio galaxies as ultra-high-energy cosmic ray source candidates. Astroparticle Physics [na spletu]. 2021. No. 1, p. 1–48. [Dostopano 12 april 2025]. DOI 10.1016/j.astropartphys.2021.102564. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=6250
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Gradivo je del revije

Naslov:Astroparticle Physics
Skrajšan naslov:Astropart. phys.
Založnik:North-Holland
ISSN:0927-6505
COBISS.SI-ID:67323 Novo okno

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:N1-0111
Naslov:Identification of cosmic ray sources amongst jetted active galaxies

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