Numerical models of neutrino and gamma-ray emission from magnetic reconnection in the core of radio-galaxies

Conference item

Non-blazar radio-galaxies emitting in the very-high-energy (VHE; >100 GeV) regime offer a unique perspective for probing particle acceleration and emission processes in black hole (BH) accretion-jet systems. The misaligned nature of these sources indicates the presence of an emission component that could be of hadronic origin and located in the core region. Here we consider turbulent magnetic reconnection in the BH accretion flow of radio-galaxies as a potential mechanism for cosmic-ray (CR) acceleration and VHE emission. To investigate if this scenario is able to account for the observed VHE data, we combine three numerical techniques to self-consistently model the accretion flow environment and the propagation of CRs plus electromagnetic cascades within the accretion flow zone. Here we apply our approach to the radio-galaxy Centaurus A and find that injection of CRs consistent with magnetic reconnection power partially reproduce the VHE data, provided that the accretion flow makes no substantial contribution to the radio-GeV components. The associated neutrino emission peaks at ∼ 1016 eV and is two orders of magnitude below the minimum IceCube flux.

Authors: Rodríguez-Ramírez, JC; de Gouveia Dal Pino, EM; Alves Batista, R

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Sissa Medialab
• Journal: Proceedings of Science
• Volume: 329
• Article number: 14
• Publication date: 2019-05-13
• Acceptance date: 2018-09-11
• Event title: International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy
• Event location: Foz do Iguaçu, Brasil
• Event start date: 2018-09-12
• Event end date: 2018-09-15
• DOI: 10.22323/1.329.0014
• EISSN: 1824-8039
• Language: English
• Keywords: FFR