ABSTRACT
Neutrinos are emitted in a period of about 10 s and roughly equal in number to those emitted by the Sun during its life. This chapter discusses the neutrinos which could be observed from supernova explosions. This picture has been dramatically changed in recent years, as more sophisticated supernova models have been developed but also by including neutrino oscillations and new collective phenomena of neutrinos, which alter the classical prediction significantly. Neutrinos carry away about 99% of the energy released in a supernova explosion. Several interesting results on neutrino properties can be drawn from the fact that practically all the expected neutrinos were detected within about 12 s and the observed flux is in agreement with expectations. If neutrinos have a magnetic moment, precession could convert left-handed neutrinos into right-handed ones due to the strong magnetic field of the neutron star.
