___ fusion of lighter elements to produce iron
___ ejection of the envelope of the star
___ ``neutronization'' of the core and release of a flood of photons
___ initial collapse of the core as degeneracy is exceed
___ SN I ___ SN II ___ Algol-type binaries ___ ``classical'' novae
___ Neutrinos were detected from SN1987a
___ There is a distinct drop in the number of white dwarfs at cool temperatures and low luminosities.
___ SN II are seen in the disks of galaxies near HII regions
___ Planetary Nebulae show enhanced abundances of Carbon and Oxygen
(a) What elements are synthesized via fusion reactions? (b) How are these newly minted elements dispersed into the interstellar medium?
____ neutrino heating
____ photo-disintegration of Iron nuclei
____ radioactive decay of Nickel and Cobalt formed during the explosion
____ radioactive decay of Hydrogen and Helium formed in the Big Bang