The Blazar Hadronic Code Comparison Project

Matteo Cerruti, Michael Kreter, Maria Petropoulou, Annika Rudolph, Foteini Oikonomou, Markus Böttcher, Stavros Dimitrakoudis, Anton Dmytriiev, Shan Gao, Apostolos Mastichiadis, Susumu Inoue, Kohta Murase, Anita Reimer, Joshua Robinson, Xavier Rodrigues, Walter Winter, Andreas Zech, Natalia Żywucka

Research output: Contribution to journalConference articlepeer-review


Blazar hadronic models have been developed in the past decades as an alternative to leptonic ones. In hadronic models the gamma-ray emission is associated with synchrotron emission by protons, and/or secondary leptons produced in proton-photon interactions. Together with photons, hadronic emission models predict the emission of neutrinos that are therefore the smoking gun for acceleration of relativistic hadrons in blazar jets. The simulation of proton-photon interactions and all associated radiative processes is a complex numerical task, and different approaches to the problem have been adopted in the literature. So far, no systematic comparison between the different codes has been performed, preventing a clear understanding of the underlying uncertainties in the numerical simulations. To fill this gap, we have undertaken the first comprehensive comparison of blazar hadronic codes, and the results from this effort will be presented in this contribution.

Original languageEnglish (US)
Article number979
JournalProceedings of Science
StatePublished - Mar 18 2022
Event37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany
Duration: Jul 12 2021Jul 23 2021

All Science Journal Classification (ASJC) codes

  • General


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