The Bulletin of The Korean Astronomical Society (천문학회보)
- Volume 39 Issue 2
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- Pages.73.1-73.1
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- 2014
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- 1226-2692(pISSN)
Deflection of Ultra-high Energy Cosmic Rays by the Galactic Magnetic Field
- Kim, Jihyun (Department of Physics, Ulsan National Institute of Science and Technology) ;
- Kim, Hang Bae (Department of Physics, Hanyang University) ;
- Ryu, Dongsu (Department of Physics, Ulsan National Institute of Science and Technology)
- Published : 2014.10.13
Abstract
We investigate the influence of the galactic magnetic field (GMF) on the arrival direction (AD) of ultra-high energy cosmic rays (UHECRs) by searching the correlation with the large-scale structure (LSS) of the universe. The deflection angle of UHECRs from sources by the GMF is reflected in a source model by introducing the Gaussian smearing angle as a free parameter. Assuming the deflections by the GMF are mainly dependent on the galactic latitude, b, we divide the regions of sky by b and analyze the correlation between the AD of UHECRs and the LSS of the universe in each region varying the smearing angle. We find the deflection is strongly dependent on the galactic latitude by the maximum likelihood estimation. Specifically, the best-fit smearing angles are
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