By after, I assume you mean the neutron star's mass being high enough for gravity to overcome neutron degeneracy pressure. The direct next step is (theoretically) a quark star, which is a stellar remnant composed of mostly quark degenerate matter exerting an outward force, halting collapse. However, none have been discovered to date.
A Neutron Star
When a neutron star is formed, protons and electrons are crushed, they collide and become neutrons.
Depending on the size of the star: a neutron star or a black hole-
Yes, both black holes and neutron stars are remnants of the death of massive stars. Neutron stars form when the core of a massive star collapses but does not produce a black hole. Black holes are formed when the core of a massive star collapses beyond the neutron star stage.
A supernova is when a massive star explodes. A neutron star is what can be formed after a supernova explosion. See related questions
neutron star is a stellar remnant so it is neither a young star nor an old star . It is formed by the gravitational collapse of massive star and are composed of neutrons . neutron star has a mass in between 1.35 to 2 solar masses
neutron star is a stellar remnant so it is neither a young star nor an old star . It is formed by the gravitational collapse of massive star and are composed of neutrons . neutron star has a mass in between 1.35 to 2 solar masses
Neutron stars are formed when stars with more than 8 times the mass of the Sun run out of fuel and explodes as a supernova. After the star explodes, the core of the star remains, the core would then become a neutron star or a black hole. If the core remain is less than 3 times the mass of the sun, it would become a neutron star.
These stars are formed preponderant by neutrons.
its original mass when it formed
black holes can be formed in a supernova explosion if the mass of the star is largeenoughusually they are created when a massive and dense star like a neutron star collapses
A neutron star is formed when a star collapses under gravity to the point where its electrons and protons combine to form neutrons. Neutron stars are extremely dense and have strong gravitational forces.