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1.
A Search for Ultra-high-energy Neutrinos from TXS 0506+056 Using the Pierre Auger Observatory
Marko Zavrtanik, Lukas Zehrer, Danilo Zavrtanik, Serguei Vorobiov, Marta Trini, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, A. Aab, 2020, original scientific article

Found in: ključnih besedah
Summary of found: ...high-energy astrophysics, neutrino astronomy, blazars, transient sources, active galaxies...
Keywords: ultra-high energy neutrinos, blazar TXS 0506+056, the Pierre Auger Observatory, high-energy astrophysics, neutrino astronomy, blazars, transient sources, active galaxies
Published: 20.10.2020; Views: 602; Downloads: 0
.pdf Fulltext (696,03 KB)

2.
New limits on Quantum Gravity energy scale with PKS 2155-304 H.E.S.S. data using a likelihood fit
Serguei Vorobiov, J. Bolmont, 2010, published scientific conference contribution abstract

Found in: ključnih besedah
Summary of found: ...based y-ray telescopes, H.E.S.S. system, Cherenkov telescopes, active galaxies, quantum gravity, Lorentz invariance breaking, ...
Keywords: ground based y-ray telescopes, H.E.S.S. system, Cherenkov telescopes, active galaxies, quantum gravity, Lorentz invariance breaking
Published: 25.04.2014; Views: 2486; Downloads: 15
URL Fulltext (0,00 KB)

3.
Searching for Pair Halos
Serguei Vorobiov, Lisa Fallon, 2010, published scientific conference contribution abstract

Found in: ključnih besedah
Summary of found: ...based y-ray telescopes, H.E.S.S. system, Cherenkov telescopes, active galaxies, extragalactic background light, electromagnetic cascades, pair...
Keywords: ground based y-ray telescopes, H.E.S.S. system, Cherenkov telescopes, active galaxies, extragalactic background light, electromagnetic cascades, pair halos
Published: 25.04.2014; Views: 2883; Downloads: 14
URL Fulltext (0,00 KB)

4.
An Indication of Anisotropy in Arrival Directions of Ultra-high-energy Cosmic Rays through Comparison to the Flux Pattern of Extragalactic Gamma-Ray Sources
Marko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, A. Aab, 2018, original scientific article

Found in: ključnih besedah
Summary of found: ...astroparticle physics, cosmic rays, active galaxies, starburst galaxies, data analysis methods...
Keywords: astroparticle physics, cosmic rays, active galaxies, starburst galaxies, data analysis methods
Published: 14.02.2018; Views: 1515; Downloads: 0
.pdf Fulltext (2,83 MB)

5.
Scrutinizing FR 0 radio galaxies as ultra-high-energy cosmic ray source candidates
Anita Reimer, Lukas Merten, Margot Boughelilba, Paolo Da Vela, Serguei Vorobiov, Fabrizio Tavecchio, Giacomo Bonnoli, Jon Paul Lundquist, Chiara Righi, 2021, original scientific article

Abstract: 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.
Found in: ključnih besedah
Summary of found: ...acceleration of particles, nonthermal radiation mechanisms, jets, active galaxies, cosmic rays...
Keywords: acceleration of particles, nonthermal radiation mechanisms, jets, active galaxies, cosmic rays
Published: 05.02.2021; Views: 433; Downloads: 0
.pdf Fulltext (4,15 MB)
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