What compact objects can result from the core collapse in a Type II supernova?
Answer
A neutron star or a black hole.
The remnant left behind following a Type II core-collapse supernova depends critically on the initial mass of the progenitor star. If the remaining core mass after the explosion is substantial but does not exceed a certain upper bound, the inward collapse halts at nuclear density, creating an extremely compact and dense stellar remnant known as a neutron star. However, if the initial mass of the star was great enough that the core collapse continues past the point where even neutron degeneracy pressure can offer resistance, the collapse proceeds indefinitely, forming a spacetime singularity known as a black hole. Both are potential endpoints for a massive star's demise via core collapse.
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