Lepto-hadronic jet-disc model for the multi-wavelength SED of M87

Abstract

The low-luminosity Active Galactic Nuclei M87, archetype of Fanaroff-Riley I radio-galaxies, was observed in a historically quiet state in 2017. While one-zone leptonic jet models alone cannot explain the core radio-to-gamma-ray spectrum, we explore a hybrid jet-disc scenario. In this work, we model the overall spectral energy distribution of M87's core with a dominating one-zone lepto-hadronic jet component, coupled with the contribution from the accretion flow. We find close-to-equipartition parameter sets for which the jet component fits the radio-to-optical data as well as the gamma-ray band, while the accretion flow mainly contributes to the X-ray band. The effects of gamma-ray absorption by the Extragalactic Background Light during the propagation towards Earth are probed and are found to be negligible for this model. The neutrino flux produced by such scenarios is also calculated, but remains below the current instruments' sensitivity.

16 pages, 7 figures, Accepted for publication in ApJ

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• Constraining the cosmic-ray pressure in the inner Virgo Cluster using H.E.S.S. observations of M 87
• On the sub-parsec scale core composition of FR 0 radio galaxies
• Explaining the Origin of TeV Gamma Rays from M87 During High and Low States
• Constraints on axion-like particles from ultra-high-energy observations of M87 with the HAWC observatory