What determines whether the remnant core becomes a neutron star or a black hole?

Answer

The mass of the collapsed iron core remnant.

The ultimate fate of the stellar remnant left behind after the supernova explosion is contingent upon the final mass contained within that compressed object. If the mass of the remnant core is situated within a specific range, generally between about 1.4 and 3 solar masses, the neutron degeneracy pressure is sufficient to counteract gravity, and the object stabilizes as a neutron star. However, if the progenitor star was exceptionally massive, leading the collapsed core's gravity to exceed the maximum support capacity of neutron degeneracy pressure, the collapse continues unimpeded, inevitably resulting in the formation of a black hole.

What determines whether the remnant core becomes a neutron star or a black hole?

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