Summary. — Hydrogen-rich supernovae can efficiently accelerate particles when the expanding ejecta interact with the surrounding circumstellar medium (CSM), producing high-energy (TeV–PeV) neutrinos. In this work we investigate the nearby SN 2024ggi, whose proximity and clear signatures of ejecta-CSM interaction make it a promising candidate for studying high-energy neutrino (HE-ν) emission. We apply a new semi-analytical model that consistently links the electromagnetic and neutrino emission components, allowing us to constrain the main explosion parameters, including the kinetic energy, ejecta mass, progenitor radius, and nickel yield. The predicted HE-ν fluence at Earth peaks at TeV energies and remains below the sensitivity of current detectors. However, the modeling establishes a robust framework for interpreting future signals from nearby interacting supernovae and fine-tunes observational strategies for next-generation multi-messenger facilities such as IceCube-Gen2 and KM3NeT/ARCA.
High-energy neutrino flux from SN2024ggi: Constraints from semi-analytic modeling of its post-explosive emission
Cosentino S. P.;Pumo M. L.
2026-01-01
Abstract
Summary. — Hydrogen-rich supernovae can efficiently accelerate particles when the expanding ejecta interact with the surrounding circumstellar medium (CSM), producing high-energy (TeV–PeV) neutrinos. In this work we investigate the nearby SN 2024ggi, whose proximity and clear signatures of ejecta-CSM interaction make it a promising candidate for studying high-energy neutrino (HE-ν) emission. We apply a new semi-analytical model that consistently links the electromagnetic and neutrino emission components, allowing us to constrain the main explosion parameters, including the kinetic energy, ejecta mass, progenitor radius, and nickel yield. The predicted HE-ν fluence at Earth peaks at TeV energies and remains below the sensitivity of current detectors. However, the modeling establishes a robust framework for interpreting future signals from nearby interacting supernovae and fine-tunes observational strategies for next-generation multi-messenger facilities such as IceCube-Gen2 and KM3NeT/ARCA.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
