# Supernova energy

1. May 10, 2012

### goldsax

where does most of the energy arise in a type 2 supernova event? is it thermonuclear or the change form gravitiational energy to kinetic during the collapse?

is the answer the same for a type 1 event..

thanks

2. May 10, 2012

### Chronos

A type II supernova results from gravitational collapse of a massive star. A type I supernova is due to detonation of matter siphoned from a companion star. There is a fairly strict limit on the mass of material that can be accreted before detonation [the Chandrasekhar limit], hence, their relatively uniform absolute luminosity. The luminosity of Type II supernova is obviously variable, but, the really big ones probably have pretty consistent outputs.

Last edited: May 10, 2012
3. May 10, 2012