Repozitorij Univerze v Novi Gorici

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Naslov:FR-0 jetted active galaxies : extending the zoo of candidate sites for UHECR acceleration
Avtorji:Merten, Lukas (Avtor)
Boughelilba, Margot (Avtor)
Reimer, Anita (Avtor)
Da Vela, Paolo (Avtor)
Vorobiov, Serguei (Avtor)
Tavecchio, Fabrizio (Avtor)
Bonnoli, Giacomo (Avtor)
Lundquist, Jon Paul (Avtor)
Righi, Chiara (Avtor)
Datoteke:Gradivo nima datotek. 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:1.08 - Objavljeni znanstveni prispevek na konferenci
Organizacija:UNG - Univerza v Novi Gorici
Opis:Fanaroff-Riley (FR) 0 radio galaxies form a low-luminosity extension to the well-established ultra-high-energy cosmic-ray (UHECR) candidate accelerators FR-1 and FR-2 galaxies. Their much higher number density — up to a factor five times more numerous than FR-1 with z ≤ 0.05 — makes them good candidate sources for an isotropic contribution to the observed UHECR flux. Here, the acceleration and survival of UHECR in prevailing conditions of the FR-0 environment are discussed. First, an average spectral energy distribution (SED) is compiled based on the FR0CAT. These photon fields, composed of a jet and a host galaxy component, form a minimal target photon field for the UHECR, which will suffer from electromagnetic pair production, photo-disintegration, photo-meson production losses, and synchrotron radiation. The two most promising acceleration scenarios based on Fermi-I order and gradual shear acceleration are discussed as well as different escape scenarios. When an efficient acceleration mechanism precedes gradual shear acceleration, e.g., Fermi-I orothers, FR-0 galaxies are likely UHECR accelerators. Gradual shear acceleration requires a jet Lorentz factor of Gamma>1.6, to be faster than the corresponding escape. In less optimistic models, a contribution to the cosmic-ray flux between the knee and ankle is expected to be relatively independent of the realized turbulence and acceleration.
Ključne besede:jetted active galaxies, FR-0 radiogalaxies, ultra-high energy cosmic rays, cosmic ray acceleration, cosmic ray energy losses
Leto izida:2021
Št. strani:str. 1-8
COBISS_ID:73062147 Povezava se odpre v novem oknu
UDK:539.1
ISSN pri članku:1824-8039
URN:URN:SI:UNG:REP:QHH51HOF
Število ogledov:315
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

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Gradivo je del zbornika

Naslov:37th International Cosmic Ray Conference [also] ICRC2021
COBISS.SI-ID:69435907 Novo okno

Gradivo je del revije

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

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Program financ.:Raziskovalni projekti - temeljni
Številka projekta:N1-0111
Naslov:Identifikacija izvorov kozmičnih žarkov med aktivnimi galaksijami s curki
Akronim:
ID projekta:info:eu-repo/grantAgreement/ARRS/Raziskovalni%20projekti%20-%20temeljni/N1-0111

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