What is this? [This is an animation.]
When a star runs out of fuel why does it not collapse forever?
1. electron degeneracy white dwarfs < 1.4 MSun [low mass, < 8MSun]
2. nuclear degeneracy neutron stars < 3 MSun [high mass, > 8MSun]
3. it does > 3 MSun
FUSION is OFF in the cores. That is why we call these dead stars.
How do they get there? Planetary nebula
Chandrasekhar Limit is 1.4 MSun
So how does it get over the limit? Certainly not by itself.
Why living with a another star has so many problems.
Note we no w have TWO type o f SN: wd-SN and one from massive stars
Note we no
TWO type o
SN: wd-SN and one from
What is this? [This is an x-ray movie]
Like a super nucleus held together by gravity
escape velocity almost 1/2c
The model rotating, magnetic neutron stars; a lighthouse
More than 3MSun left over after SN
RS = 2GM/c2 about 3km per MSun
Relativity curved spacetime
Near the event horizon
And the weirdest Gamma Ray Bursters
Possible explanations hypernova neutron star collisions