Observing Supernova Neutrino Light Curves with Super-Kamiokande: Expected Event Number over 10 s

Understand

Supernova neutrinos are crucially important to probe the final phases of massive star evolution.

• As is well known from observations of SN1987A, neutrinos provide information on the physical conditions responsible for neutron star formation and on the supernova explosion mechanism.
• However, there is still no complete understanding of the long-term evolution of neutrino emission in supernova explosions, although there are a number of modern simulations of neutrino radiation hydrodynamics, which study neutrino emission at times less than one second after the bounce.
• In the present work we systematically calculate the number of neutrinos that can be observed in Super-Kamiokande over periods longer than ten seconds using the database of Nakazato et al.