What value, known as the Chandrasekhar limit, defines the critical core mass?

Answer

1.4 times the mass of our Sun

The fate of the collapsing iron core hinges on its mass relative to a specific threshold known as the Chandrasekhar limit. This limit is quantified as approximately 1.4 times the mass of the Sun. If the mass of the inert iron core remains under this value, the electron degeneracy pressure, which is the force resisting further compression from gravity, might be sufficient to support the core, potentially leading the star to end its life as a stable white dwarf. However, for stars destined for a Type II supernova, this limit is inevitably exceeded, meaning the degeneracy pressure of the electrons fails to counteract gravity, sealing the core's fate toward collapse.

What value, known as the Chandrasekhar limit, defines the critical core mass?

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