That namesake pressure arises from the need to elevate fermions into higher energy states due to the impossibility of multiple fermions occupying the same quantum state.
Low-mass AGB stars temporarily contain this kind of matter after their helium has been entirely consumed; this matter is then eliminated by a carbon or oxygen flash while in low-mass stars, a similar process called a helium flash signals the beginning of helium burning and the elimination of this kind of matter. Pressure in this kind of matter is independent of temperature, but increases non-linearly as the four-thirds or five-thirds power of the density. That namesake pressure arises from the need to elevate fermions into higher energy states due to the impossibility of multiple fermions occupying the same quantum state. For 10 points, identify this kind of matter found in strange stars, white dwarfs, and neutron stars, supported against gravitational collapse not by thermal energy, but rather by the Pauli exclusion principle.
Low-mass AGB stars temporarily contain this kind of matter after their helium has been entirely consumed; this matter is then eliminated by a carbon or oxygen flash while in low-mass stars, a similar process called a helium flash signals the beginning of helium burning and the elimination of this kind of matter.
degenerate matter [accept neutron-degenerate matter, electron-degenerate matter, degenerate helium, degenerate carbon, degenerate oxygen and other more specific answers containing degenerate throughout]