Neutron Capture Flashcards
1
Q
What does a type 2 supernova leave behind?
A
A neutron star or black hole
2
Q
What are the two things that indicate a supernova is type 2
A
Strong H{alpha} emission lines (singularly ionised hydrogen) and a large flux of neutrinos.
3
Q
What has to happen to cause a type 1a supernova?
A
A binary star system consisting of a white dwarf and red giant merging. This causes the core to exceed 1.4 M (chandrasekhar limit)
4
Q
What conditions are needed for production of a type 2 supernova?
A
The star needs to be a red supergiant with a core mass over 10 M
5
Q
Why are supernova used as “Standard candles”?
A
There is little variation in its absolute magnitude equal to roughly -19
6
Q
What is indicative of a type 1a supernova?
A
Strong Si II lines due to a rapid onset of C and O fusion.
