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We evaluate the validity of leading models of the Galactic magnetic field for predicting UHECR deflections from Cen A. The Jansson-Farrar 2012 GMF model (JF12), which includes striated and random components as well as an out-of-plane…

High Energy Astrophysical Phenomena · Physics 2013-07-10 Glennys R. Farrar , Ronnie Jansson , Ilana J. Feain , B. M. Gaensler

We report results of the first comprehensive, high resolution study of the deflections of UHECRs using a realistic model of the Galactic magnetic field and extending to sufficiently low rigidities, R = E/Z = 10^18 V, to describe Fe in the…

High Energy Astrophysical Phenomena · Physics 2019-05-15 Glennys R. Farrar , Michael S. Sutherland

We present numerical simulations for energy spectra and angular distributions of nucleons above 10^{19} eV injected by the radio-galaxy Centaurus A at a distance 3.4 Mpc and propagating in extra-galactic magnetic fields in the sub-micro…

Astrophysics · Physics 2009-11-06 C. Isola , M. Lemoine , G. Sigl

We study the influence of the random part of the Galactic magnetic field on the propagation of ultra high-energy cosmic rays. Within very mild approximations about the properties of the electron density fluctuations in the Galaxy we are…

Cosmology and Nongalactic Astrophysics · Physics 2016-02-25 M. S. Pshirkov , P. G. Tinyakov , F. R. Urban

Since ultra-high-energy cosmic rays (UHECRs) are electrically charged particles, they are deflected by magnetic fields. Those magnetic fields can act as lenses, altering their trajectories and (de)magnifying their apparent source images.…

High Energy Astrophysical Phenomena · Physics 2025-09-24 Danelise de Oliveira Franco , Günter Sigl

The propagation of ultra high energy cosmic rays in Galactic and extragalactic magnetic fields is investigated in the present paper. The motion of charged particles of different energies and chemical composition is simulated using different…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Oleksandr Sushchov , Oleh Kobzar , Bohdan Hnatyk , Volodymyr Marchenko

We study the deflections of ultra-high-energy cosmic rays in several widely used models of the coherent Galactic magnetic field (GMF), including PT11 (Pshirkov et al. [1]), JF12 (Jansson and Farrar [2]), UF23 (Unger and Farrar [3]) and…

High Energy Astrophysical Phenomena · Physics 2025-11-20 Alexander Korochkin , Dmitri Semikoz , Peter Tinyakov

We predict the arrival direction distribution of cosmic rays including their deflection in the Galactic magnetic field, for several combinations of source and composition hypotheses: the sources are hard X-ray AGNs or uniformly sample the…

High Energy Astrophysical Phenomena · Physics 2013-08-20 J. Roberts , G. Farrar

The surprising isotropy of the ultra-high-energy cosmic ray (UHECR) sky makes it difficult to identify their sources. Observables such as energy spectrum, mass composition and arrival directions are affected by interactions with background…

High Energy Astrophysical Phenomena · Physics 2025-06-12 Simone Rossoni , Günter Sigl

We report the results of 3D simulations of the trajectories of ultra-high energy protons and Fe nuclei (with energies $E = 4 \times 10^{19}$ and $2.5 \times 10^{20} eV$) propagating through the galactic magnetic field from the sources to…

Locating the sources of ultra-high energy cosmic rays (UHECRs) still remains a difficult puzzle for modern astrophysics. A major hurdle in the search for the sources is the fact that UHECRs are deflected by the Galactic magnetic field…

High Energy Astrophysical Phenomena · Physics 2019-03-12 G. Magkos , V. Pavlidou

In this work, we present detailed simulations for propagation of ultra-high energy (UHE) heavy nuclei, with E > 60 EeV, within recent Galactic Magnetic Field (GMF) models. We investigate the impacts of the regular and turbulent components…

High Energy Astrophysical Phenomena · Physics 2015-05-30 G. Giacinti , M. Kachelriess , D. V. Semikoz , G. Sigl

The ultrahigh-energy cosmic-ray anisotropies discovered by the Pierre Auger Observatory give the potential to finally address both the particles' origins and properties of the nearby extragalactic magnetic field (EGMF). We examine the…

High Energy Astrophysical Phenomena · Physics 2012-10-02 Hasan Yuksel , Todor Stanev , Matthew D. Kistler , Philipp P. Kronberg

We construct a map of deflections of ultra-high energy cosmic rays by extragalactic magnetic fields using a magneto-hydrodynamical simulation of cosmic structure formation that realistically reproduces the positions of known galaxy clusters…

Astrophysics · Physics 2009-11-10 Klaus Dolag , Dario Grasso , Volker Springel , Igor Tkachev

We study the influence of the regular component of the Galactic magnetic field (GMF) on the arrival directions of ultra-high energy cosmic rays (UHECRs). We find that, if the angular resolution of current experiments has to be fully…

Astrophysics · Physics 2009-11-13 M. Kachelriess , P. D. Serpico , M. Teshima

From deflections in galactic and extragalactic magnetic fields energy dependent structures in the arrival directions of ultra-high energy cosmic rays (UHECR) are expected. We propose to characterize these structures by the strength of…

Instrumentation and Methods for Astrophysics · Physics 2013-08-01 Martin Erdmann , Tobias Winchen

Arrival directions of ultra-high energy cosmic rays from the direction of ten brightest radio sources lying within 50 Mpc from our Galaxy were studied by using recent models of the largescale Galactic magnetic field. A detailed study, where…

High Energy Astrophysical Phenomena · Physics 2015-10-01 Radomír Šmída , Ralph Engel

The study of propagation of Ultra High Energy Cosmic Rays (UHECR) is a key step in order to unveil the secret of their origin. Up to now it was considered only the influence of the galactic and the extragalactic magnetic fields. In this…

Astrophysics · Physics 2009-11-11 Pascal Chardonnet , Alvise Mattei

Recent studies, supported by updated hadronic interaction models, suggest that the mass composition of ultra-high-energy cosmic rays may be heavier than previously assumed. This has significant implications for source identification, as the…

High Energy Astrophysical Phenomena · Physics 2026-01-09 Alena Bakalová , Ana Laura Müller , Jakub Vícha

We calculate the arrival direction distribution of ultra-high-energy cosmic rays (UHECRs) with a new suite of models of the Galactic magnetic field (GMF), assuming sources follow the large-scale structure of the Universe. Compared to…

High Energy Astrophysical Phenomena · Physics 2024-11-06 Teresa Bister , Glennys R. Farrar , Michael Unger
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