Disentangling the multi-messenger puzzle of the AGN-starburst composite galaxy NGC 1068
Paper in proceeding, 2024
The recent observation of tera electronvolt neutrinos from NGC 1068 has clarified that the dominant high-energy neutrino sources might actually be gamma-ray dim at these energies. But to understand the whole multi-messenger picture, we need not only to account for the central region of this active galactic nucleus (AGN) but also for its circumnuclear starburst region. In this work, we update a recently published multi-messenger model for AGN-starburst composite galaxies by a detailed treatment of the stochastic acceleration process within the AGN corona. Moreover, we introduce some updates of the multi-messenger data and show that the entire spectrum can still be described very well if both, starburst and AGN corona, are taken into account. In contrast to the previous results a significantly lower CR pressure within the corona is needed and a strong decline of the neutrino flux towards lower energies at about 1 TeV is obtained.
Author
B. Eichmann
Ruhr-Universität Bochum
Ruhr Astroparticle and Plasma Physics Center (RAPP Center)
Foteini Oikonomou
Norwegian University of Science and Technology (NTNU)
S. Salvatore
Ruhr-Universität Bochum
Ruhr Astroparticle and Plasma Physics Center (RAPP Center)
R. -J. Dettmar
Ruhr Astroparticle and Plasma Physics Center (RAPP Center)
Ruhr-Universität Bochum
Julia Tjus
Ruhr Astroparticle and Plasma Physics Center (RAPP Center)
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Ruhr-Universität Bochum
Proceedings of Science
18248039 (eISSN)
Vol. 444 1453Subject Categories (SSIF 2025)
Astronomy, Astrophysics, and Cosmology
Subatomic Physics