Multi-zone model as origin of hard gamma-rays spectrum in extreme BL Lacs

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
"The emission of the so-called extreme blazars challenges the particle acceleration models. The hardness of its spectrum, $ smaller 2$, demands extreme parameters using the standard one-zone SSC model in the high energy band. Some authors use both two-zone or hadronic/leptohadronic models to relax these extreme values. In this work, we present a leptohadronic multi-zone model to explain the broadband emission, where the contribution of two components forms the hard-spectrum in the $\gamma$-rays band. The first is produced by the photopion process, where accelerated protons in an inner blob located close to the core interact with the X-ray photons coming from a pair plasma. This mechanism will be responsible for $\gamma$-rays in the TeV's energies range. The second component is produced by an outer blob, which corresponds to the source of $X$-rays and $\gamma$-rays via the standard SSC model. Additionally, neutrinos with $\sim$ TeV's energies are expected and could be restricted by IceCube's observations."

Authors: Edilberto Aguilar | Nissim Fraija
Indico-ID: 690
Proceeding URL: https://pos.sissa.it/395/1007