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Astrophysics Colloquium

On the Origin of the Ultra-high Energy Cosmic-rays
Presented by Noémie Globus
Center for Cosmology and Particle Physics, New York University / Center for Computational Astrophysics, Flatiron Institute

Thursday, December 12, 2019
11:00 A.M. in 169-336

Abstract
Although their astrophysical sources remain a mystery, new measurements brought by experiments such as the Pierre Auger Observatory and Telescope Array have radically improved our knowledge of the ultra-high energy cosmic-rays (UHECRs). The recent report of a large scale dipole anisotropy at 6 sigma significance level has been a breakthrough in cosmic-ray physics. I will discuss the observational result and present the anisotropy expected from the large-scale structure with emphasis on the dipole and quadrupole components. I will discuss the sensitivity of this calculation to the different hadronic interaction models and to the Galactic and extragalactic magnetic field model parameters.

JPL Contact: Gael Roudier (3-7252)


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