The Neutrino Radiation of Collapsing Stellar Cores and the Neutrino Burst Detected from Supernova 1987A
The properties of the neutrino burst generated by massive 1.5 2M ☉ collapsing stellar iron-oxygen cores are discussed. Special attention is given to the neutrino heat conductivity theory which allows us to calculate the transport of neutrinos through the collapsing stellar core up to the formation and during the first seconds of cooling of a hot hydrostatic neutron star. The theoretical predictions seem to be in good agreement with both the KAMIOKANDE II and IMB data on the neutrino burst detected from SN 1987A. The most reliable constraint on the neutrino rest mass is shown to bem v <20 30eV, while the safest upper limit on the neutrino magnetic moment, µ v < 10-11 Bohr magnetons, results rather from the cooling of white dwarfs than from the SN 1987A neutrino data.