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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…

高能天体物理现象 · 物理学 2024-11-06 Teresa Bister , Glennys R. Farrar , Michael Unger

We express the mean square deflections of the ultra-high energy cosmic rays (UHECR) caused by the random component of the Galactic magnetic field (GMF) in terms of the GMF power spectrum. We use recent measurements of the GMF spectra in…

天体物理学 · 物理学 2009-11-10 P. G. Tinyakov , I. I. 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…

天体物理学 · 物理学 2009-11-13 M. Kachelriess , P. D. Serpico , M. Teshima

Ultrahigh-energy cosmic rays (UHECRs) experience deflections as they traverse the Galactic magnetic field (GMF), which must be accounted for when tracing them back to their sources. After briefly summarizing our results on uncertainties in…

高能天体物理现象 · 物理学 2025-03-04 Michael Unger , Glennys R. Farrar

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…

高能天体物理现象 · 物理学 2019-03-12 G. Magkos , V. Pavlidou

The propagation trajectories of the highest energy cosmic rays (HECRs) are deflected by not only intergalactic magnetic field but also Galactic magnetic field (GMF). These magnetic fields can weaken the positive correlation between the…

高能天体物理现象 · 物理学 2010-12-03 Hajime Takami , Katsuhiko Sato

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.…

高能天体物理现象 · 物理学 2025-09-24 Danelise de Oliveira Franco , Günter Sigl

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…

高能天体物理现象 · 物理学 2025-11-20 Alexander Korochkin , Dmitri Semikoz , Peter Tinyakov

Extensive simulations of the ultra-high energy cosmic ray (UHECR) propagation in the Galactic magnetic field (GMF) have been performed, and the results are presented. The use of different available models of the large-scale GMF and/or…

星系天体物理 · 物理学 2009-01-23 Serguei Vorobiov , Mustafa Hussain , Darko Veberič

We present the results of simulations of the ultra-high energy cosmic ray (UHECR) propagation in the Galactic magnetic field (GMF). Different assumptions on the large-scale GMF structure and/or primary particle lead to distinctly different…

高能天体物理现象 · 物理学 2009-12-08 S. Vorobiov , M. Hussain , D. Veberič

(abridged) Ultra-high energy cosmic rays (UHECRs) are highly energetic charged particles with energies exceeding $10^{18}$ eV. Identifying their sources and production mechanism can provide insight into many open questions in astrophysics…

高能天体物理现象 · 物理学 2023-10-04 Alexandros Tsouros , Gordian Edenhofer , Torsten Enßlin , Michalis Mastorakis , Vasiliki Pavlidou

We propose a new way to detect individual bright Ultra-High Energy Cosmic Ray (UHECR) sources above background if the Galactic Magnetic Field (GMF) gives the main contribution to UHECR deflections. This method can be directly applied to…

高能天体物理现象 · 物理学 2011-07-13 G. Giacinti , D. V. Semikoz

Some studies suggested that a correlation between locations of BL Lacertae objects (BL Lacs) and the arrival directions of the ultrahigh energy cosmic rays (UHECRs) exists. Especially by assuming the primary particles charged +1 and using a…

天体物理学 · 物理学 2007-05-23 Zhen Cao , Ben Zhong Dai , Jian Ping Yang , Li Zhang

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…

高能天体物理现象 · 物理学 2013-08-20 J. Roberts , G. Farrar

The Galactic magnetic field, locally observed to be on the order of a few $\mu$G, is sufficiently strong to induce deflections in the arrival directions of ultra-high energy cosmic rays. We present a method that establishes measures of…

天体物理仪器与方法 · 物理学 2015-06-05 Michael S. Sutherland , Brian M. Baughman , James J. Beatty

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…

高能天体物理现象 · 物理学 2025-06-12 Simone Rossoni , Günter Sigl

Planned and ongoing campaigns for the acquisition of high-quality local measurements of the Galactic magnetic field (GMF) at interstellar cloud locations have generated intense interest in the use of such measurements to accurately…

高能天体物理现象 · 物理学 2025-07-30 S. Romanopoulos , M. Mastorakis , V. Pavlidou

The puzzle of ultra-high energy cosmic rays (UHECRs) still remains unresolved. With the progress in preparation of next generation experiments (AUGER, EUSO, OWL) grows also the importance of directional analysis of existing and future…

天体物理学 · 物理学 2009-11-10 Michael Prouza , Radomir Smida

(abridged) Ultra-high energy cosmic rays (UHECRs) are extremely energetic charged particles with energies surpassing $10^{18}$ eV. Their sources remain elusive, obscured by deflections caused by the Galactic magnetic field (GMF). This…

Active galactic nuclei (AGN) are considered as one of the most appropriate sources of cosmic rays with energy exceeding $\sim 10^{18}$ eV. Virgo A (M87 or NGC 4486) is the second closest to the Milky Way active galaxy. According to existing…

高能天体物理现象 · 物理学 2016-02-05 Oleh Kobzar , Olexandr Sushchov , Bohdan Hnatyk , Volodymyr Marchenko
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