English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Blazars are a subclass of active galactic nuclei (AGN) that have arelativistic jet with a small viewing angle towards the observer. Recentresults based on hadronic scenarios have motivated an ongoing discussion of howa blazar can produce high energy neutrinos during a flaring state and whichscenario can successfully describe the observed gamma-ray behaviour. Markarian421 is one of the closest and brightest objects in the extragalactic gamma-raysky and showed flaring activity over a 14-day period in March 2010. In thiswork, we describe the performed analysis of \textit{Fermi}-LAT data from thesource focused on the MeV range (100 MeV - 1 GeV), and study the possibility ofa contribution coming from the $p\gamma$ interactions between protons and MeVSSC target photons to fit the very high energy (VHE) gamma-ray emission. Thefit results were compared with two leptonic models (one-zone and two-zone)using the Akaike Information Criteria (AIC) test, which evaluatesgoodness-of-fit alongside the simplicity of the model. In all cases thephotohadronic model was favoured as a better fit description in comparison tothe one-zone leptonic model, and with respect to the two-zone model in themajority of cases. Our results show the potential of a photohadroniccontribution to a lepto-hadronic origin of gamma-ray flux of blazars. Futuregamma-ray observations above tens of TeV and below 100 MeV in energy will becrucial to test and discriminate between models.

Photohadronic Modelling of the 2010 Gamma-ray Flare from Mrk 421