Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
On the origin of ultra-high energy cosmic ray anisotropy
N. Globus, C. Ding,* G.R. Farrar
*corresponding author
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Pre-published on: 2019 July 22
Published on:
Abstract
We will discuss the anisotropy of ultra-high energy cosmic rays expected from large-scale structures with emphasis on the dipole and quadrupole components. We consider the sensitivity of these results to the different hadronic interaction models, galactic and extragalactic magnetic field model parameters. Assuming a spectrum and composition that account for Auger data we show that the energy evolution of the dipole amplitude and direction above 8 EeV is well accounted for assuming the large scale structure for the UHECR source distribution. Our extragalactic parameters are ($B_{\rm EGMF}\sim0.6$ nG, $\lambda_{\rm EGMF}\sim$0.2 Mpc) and the Galactic magnetic field is from Jansson \& Farrar 2012, with $\lambda_{\rm GMF}\sim75$ pc.
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