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Hi Andrew, where did you learn all this stuff? I only learned about the basic Type I and Type II SN on my Astronomy course at Uni. Mind you that was over 11 years ago. Now each Type can be broken down into further sub groups.
I used to think that once a star was over 8 solar masses we saw CNO (Carbon Nitrogen Oxygen) reactions predominantly replace the PPI and PPII type reactions. Does this apply to a star in it's White Dwarf stage as all the Hydrogen should have been converted to Helium?
Apologies for the questions, only it looks like you have more advanced knowledge than I do.
Pete
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