Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 86: Multi-Messenger

T 86.10: Talk

Thursday, March 28, 2019, 18:15–18:30, S13

Testing the Pierre Auger Observatory starburst galaxy correlation aided anisotropy result with CR Propa simulations. — •Wilson Namasaka, Karl - Heinz Kampert, and Eric Mayotte — Bergische Universität Wuppertal-Germany, Gaußstr. 20, 42119 Wuppertal

Intermediate scale anisotropies in the distribution of UHECR arrival directions can be associated with two prominent classes of extragalactic gamma-ray sources detected by Fermi-LAT. In a recent study, a correlation between the arrival direction of cosmic rays at energies above 39 EeV and the positions of starburst galaxies was reported by the Pierre Auger Collaboration with a 4.0σ statistical significance when the observed gamma-ray Luminocity used as a proxy for cosmic ray Luminocity. In the study, the predicted cosmic-ray excess maps were created using an angular smearing parameter fit to the observed arrival direction distribution via an optimization scan. In this research, we investigate the viability of this angular smearing using CRPropa simulations to test whether the results of the Pierre Auger Observatory study can be reproduced by the deflections expected due to magnetic fields. Preliminarily, we have selected the five strongest gamma-ray sources in both the Fermi-LAT AGN and the SBG catalogs and match our CR arrival intensity to the 1.4 GHz emmissions Luminosity for each of these sources. Simulations of the flux from these sources including extragalactic and galactic fields will be presented in this talk.*Gefördert durch die BMBF Verbundforschung Astroteilchenphysik(Vorhaben 05A17PX1).