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T: Fachverband Teilchenphysik

T 78: Kosmische Strahlung IV

T 78.1: Talk

Thursday, March 22, 2018, 16:30–16:45, Philo-HS6

Correlation analysis between arrival directions of ultra-high energy cosmic rays and positions of starburst galaxies — •Marcus Wirtz, Tersa Bister, Martin Erdmann, and Martin Urban — III. Physikalisches Institut A, RWTH Aachen University, Deutschland

A strong correlation between the arrival directions of ultra-high energy cosmic rays above 39 EeV and the positions and fluxes of nearby starburst galaxies has been discovered recently. By performing a likelihood analysis with symmetric search radius around the galaxy positions, an isotropic arrival hypothesis can be excluded at the 4.0 σ confidence level. We extend this model by introducing an individual charge-sensitive cosmic ray weight in the likelihood, and therefore account for our current understanding of cosmic ray deflection in the galactic magnetic field.