What fraction of the total energy released during a core-collapse supernova escapes primarily in the form of neutrinos?

Answer

Upwards of 99%

A significant majority, often exceeding 99% of the total energy from a core-collapse event, is carried away by neutrinos, with only a small percentage driving the visible explosion.

What fraction of the total energy released during a core-collapse supernova escapes primarily in the form of neutrinos?
astronomystarssupernovaexplosionLuminositypeak