Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 103: Cosmic rays IV

T 103.7: Vortrag

Freitag, 3. April 2020, 12:30–12:45, L-3.002

Testing The Pierre Auger Observatory Starburst Galaxy and Active Galactic Nuclei Correlation Anisotropy Result with CRPropa Simulations — •Wilson Namasaka — Bergische Universtät 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 most recent study, a correlation between the arrival direction of cosmic rays at energies above 38 EeV for starburst galaxies (SBG) and 39 EeV for active galactic nuclei (AGN) was reported by the Pierre Auger Collaboration with a significance of 4.5σ and 3.1σ respectively. In the study, the observed gamma-ray Luminosity was used as a proxy for cosmic ray Luminosity. The predicted cosmic ray excess maps were created using an angular smearing parameter to fit the observed arrival direction distribution via an optimization scan. In this research, we investigate the viability of this angular smearing using CRPropa simulation to test whether the results of the Pierre Auger Observatory can be reproduced by the deflections expected due to magnetic fields. We have selected the five strongest gamma-ray sources in both the Fermi-LAT AGN and SBG catalogs, and match our CR arrival intensity to the 1.4 GHz emission Luminosity for each of these sources. Simulations of the flux from these sources including extragalactic and galactic fields will be discussed. Furthermore, the results of search radius from both catalogs will be presented in this talk.

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