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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

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

(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

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 investigate the deflections of UHE protons by Galactic magnetic field(GMF) using four conventional GMF models in order to discuss the positional correlation between the arrival distribution of UHECRs and their sources. UHE protons coming…

天体物理学 · 物理学 2009-02-10 Hajime Takami , Katsuhiko Sato

We reconstruct the trajectories of ultra-high energy cosmic rays (UHECR) - observed by the AGASA experiment - in the Galactic magnetic field assuming that all particles have the same charge. We then study correlations between the…

天体物理学 · 物理学 2008-11-26 P. G. Tinyakov , I. I. Tkachev

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

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

The origin and composition of Ultra-High Energy Cosmic Ray Events (UHECRs) are under debate. Here we improve constraints on the source population(s) and compositions of UHECRs by accounting for UHECR deflections within existing Galactic…

高能天体物理现象 · 物理学 2015-05-14 Neil M. Nagar , Javier Matulich

We estimate the biases caused by the coherent deflection of cosmic rays due to the Galactic magnetic field (GMF) in maximum-likelihood analysis for searches of ultrahigh-energy cosmic ray (UHECR) sources in the literature. We simulate mock…

高能天体物理现象 · 物理学 2023-06-14 Ryo Higuchi , Takashi Sako , Toshihiro Fujii , Kazumasa Kawata , Eiji Kido

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

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

We study possible correlations between ultrahigh energy cosmic rays (UHECRs), observed by Auger, AGASA and Yakutsk, and nearby active galactic nuclei (AGNs) and $Fermi$ sources. We consider the deflection effects by a Galactic magnetic…

高能天体物理现象 · 物理学 2014-11-20 Yun-Ying Jiang , L. G. Hou , J. L. Han , X. H. Sun , Wei Wang

We consider various classes of persistent extragalactic astrophysical sources which have been suggested in literature as possible emitters of ultra-high-energy cosmic rays (UHECR). We compare the strength of the claimed correlations by a…

天体物理学 · 物理学 2008-11-26 D. S. Gorbunov , S. V. Troitsky

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 calculate angular correlation function between ultra-high energy cosmic rays (UHECR) observed by Yakutsk and AGASA experiments, and most powerful BL Lacertae objects. We find significant correlations which correspond to the probability…

天体物理学 · 物理学 2009-11-06 P. G. Tinyakov , I. I. Tkachev

(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…

With the aim of testing recent claims for a particularly strong correlation between ultra-high energy cosmic rays (UHECRs), observed with the AGASA and the Yakutsk experiments, and a sample of BL Lacertae (BL Lacs), we here conduct a blind…

天体物理学 · 物理学 2009-11-10 Diego F. Torres , Stephen Reucroft , Olaf Reimer , Luis A. Anchordoqui

Ultrahigh energy cosmic rays (UHECRs) are believed to originate from astrophysical sources, which should trace the large scale structure (LSS) of the universe. On the other hand, the magnetic field in the intergalactic space (IGMF), which…

高能天体物理现象 · 物理学 2009-06-29 Dongsu Ryu , Hyesung Kang , Santabrata Das
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