The problematic connection between gamma-ray bursts and ultra-high energy cosmic rays

Damien Bégué, Filip Samuelsson, Asaf Pe'Er, Felix Ryde

Research output: Contribution to journalConference articlepeer-review


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. A detailed discussion on GRB 060218 as UHECR source is also presented.

Original languageEnglish
Article number091
JournalProceedings of Science
StatePublished - 2019
Event7th High Energy Phenomena in Relativistic Outflows, HEPRO 2019 - Barcelona, Spain
Duration: 9 Jul 201912 Jul 2019

Bibliographical note

Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).


Dive into the research topics of 'The problematic connection between gamma-ray bursts and ultra-high energy cosmic rays'. Together they form a unique fingerprint.

Cite this