Jan 7, 2021 · The factors affecting how and why supernovae occur are discussed, and the current status of core-collapse supernova explosion theory is reviewed.

In the core of the star, hydrogen is fused into helium, releasing thermal energy that heats the star's core and provides outward pressure that supports the star's layers against collapse – a …

The core of the star, about the size of earth, collapses until neutron degeneracy pressure can balance that of gravity. By this point the core is about the size of Manhattan (∼ 10 k m).

The iron cores in massive stars are supported by electron degeneracy pressure, strongly cooled via neutrinos, and surrounded by burning shells of Si, O, C and so on.

Apr 9, 2025 · Before the collapse begins the core is full of radioactive nickel-56 which has not yet decayed. Because nickel-56 decays via positron emission, the electron capture process is …

Aug 21, 2024 · As the core collapses, electron degeneracy pressure gives way, leading to neutronization and the formation of a neutron star or black hole. The outer layers of the star …

The degeneracy pressure exerted by electrons within the core cannot counteract the core's self-gravity; only the heat generated through thermonuclear fusion keeps the stellar core from …

Jan 24, 2025 · When all the fuel is burned, the star no longer produces enough thermal pressure to balance gravity, and the star dies in a rapid and massive explosion known as a Type II (or …

The energy of these trapped neutrinos increases the temperature and pressure behind the shock wave, which in turn gives it strength as it moves out through the star. The passage of this …

Once the Chandrasekhar Limit is reached, the electron degeneracy pressure of the atoms within the core is no longer able to stop the further collapse of the star; radiation pressure is no …