Speaker
Description
Core-collapse supernovae (CCSNe) are driven by low-energy (MeV) neutrinos, which release most of the system's gravitational binding energy. However, certain CCSNe with dense circumstellar material (CSM) can produce high-energy (HE) neutrinos (GeV and above) through hadronuclear (pp) or photohadronic (pγ) interactions, as the supernova ejecta interact with the CSM to form shocks and accelerate protons. These HE neutrinos offer a unique opportunity to probe cosmic ray acceleration mechanisms, complementing the insights provided by MeV neutrinos from nuclear processes.
Two main production mechanisms for HE neutrinos in CCSNe are considered: the interaction between supernova ejecta and CSM and relativistic choked jets (CJs), which are similar to gamma-ray bursts (GRBs) but do not pierce the stellar envelope, leading to neutrino emission without gamma-ray counterparts.
KM3NeT/ARCA experiment is well-suited for detecting high-energy neutrinos from cosmic sources, including core-collapse supernovae (CCSNe). Such observations can extend the detection horizon beyond the Magellanic Clouds, offering valuable insights into the astrophysical processes driving cosmic ray acceleration and the lifecycle of massive stars.
