Cosmic ray ensembles as signatures of ultra-high energy photons interacting with the solar magnetic field

N. Dhital, P. Homola, D. Alvarez-Castillo, D. Góra, H. Wilczyński, K. Almeida Cheminant, B. Poncyljusz, J. Mȩdrala, G. Opiła, A. Bhatt, B. Łozowski, G. Bhatta, Bibrzycki, T. Bretz, A. C¨wikła, L. Del Peral, A. R. Duffy, A. C. Gupta, B. Hnatyk, P. JagodaM. Kasztelan, K. Kopański, P. Kovacs, M. Krupinski, M. Medvedev, V. Nazari, M. Niedźwiecki, D. Ostrogórski, M. Piekarczyk, M. D. Rodríguez Frías, K. Rzecki, K. Smelcerz, K. Smolek, J. Stasielak, O. Sushchov, T. Wibig, K. Wozniak, J. Zamora-Saa, Z. Zimborás, A. Tursunov

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Propagation of ultra-high energy photons in the solar magnetosphere gives rise to cascades comprising thousands of photons. We study the cascade development using Monte Carlo simulations and find that the photons in the cascades are spatially extended over millions of kilometers on the plane distant from the Sun by 1 AU. We estimate the chance of detection considering upper limits from current cosmic rays observatories in order to provide an optimistic estimate rate of 0.002 events per year from a chosen ring-shaped region around the Sun. We compare results from simulations which use two models of the solar magnetic field, and show that although signatures of such cascades are different for the models used, for practical detection purpose in the ground-based detectors, they are similar.

Original languageEnglish
Article number038
JournalJournal of Cosmology and Astroparticle Physics
Issue number3
Publication statusPublished - 1 Mar 2022


  • cosmic ray experiments
  • cosmic ray theory
  • cosmic rays detectors
  • ultra high energy cosmic rays

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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