If a collapsed core mass remaining after a supernova is between 1.4 and 3 solar masses, what is the resulting remnant?

Answer

A Neutron Star

If the mass of the remnant core falls within the range of roughly 1.4 to 3 solar masses, the compression results in the formation of an incredibly dense Neutron Star.

If a collapsed core mass remaining after a supernova is between 1.4 and 3 solar masses, what is the resulting remnant?
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