May 27, 2019 to June 5, 2019
Europe/Paris timezone

F. Samuelsson: The problematic connection between gamma-ray bursts (GRBs) and ultra-high energy cosmic rays (UHECR)

Jun 4, 2019, 6:40 PM
Amphitheatre (Cargèse)



Institut d’Etudes Scientifiques de Cargèse Menasina F-20130 CARGÈSE


Filip Samuelsson (KTH Royal Institute of Technology)


The acceleration site for UHECR is still an open question despite extended research and GRBs are considered one of the most promising source candidates. Under the likely assumption that electrons are also accelerated at the UHECR acceleration site, synchrotron emission from these co-accelerated electrons is inevitable. We characterize this synchrotron emission and compare it to observed GRB spectra and find that for standard parameters, the synchrotron flux from these electrons would be much too luminous. This result challenges both high- and low-luminosity GRBs as accelerators of UHECR.

Presentation materials