SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 65: Gamma Astronomy III

T 65.1: Vortrag

Mittwoch, 22. März 2023, 15:50–16:05, POT/0151

Towards searching for ultra-high energy photons from galactic PeVatrons — •Chiara Papior, Marcus Niechciol, Markus Risse, and Philip Ruehl — Center for Particle Physics Siegen, Experimentelle Astroteilchenphsik, Universität Siegen

Recently, photons from galactic sources with maximum energies in the PeV range have been discovered. Sources which are able to accelerate particles to these energies are referred to as PeVatrons. They do not only emit photons, but are also candidate sources of galactic cosmic rays. The only firmly identified PeVatron is the Crab nebula. However, through theoretical considerations and directional observations of PeV photon signals, several other potential PeVatron candidates have been proposed, including pulsars, supernova remnants and massive stars. In this contribution, the energy spectra of such source candidates are modelled and extrapolated to even higher energies reaching up to EeV scales. Photons of these energies are referred to as ultra-high-energy (UHE) photons. The results of the extrapolation can then be used to obtain information on the required sensitivity for the measurement of UHE photons from specific source candidates. The work presented in this contribution aims to evaluate the potential at present and future observatories to detect UHE photons from certain sources.
This work is supported by the Deutsche Forschungsgemeinschaft (DFG).