For less massive stellar remnants, which pressure source is sufficient to halt gravitational collapse and form a white dwarf?

Answer

Electron degeneracy pressure

If the core mass does not exceed the Chandrasekhar limit (about 1.4 solar masses), the quantum mechanical resistance known as electron degeneracy pressure is sufficient to support the remnant against further compression.

For less massive stellar remnants, which pressure source is sufficient to halt gravitational collapse and form a white dwarf?
Corestarmassive