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A white dwarf star, as well as any other stable variety of star,
is held together by the pressure popularly known as "gravity".
In the opposite direction, white dwarf stars are kept from collapsing completely by degeneracy pressure. Specifically, for white dwarf stars, it's electron degeneracy pressure, which arises from the fact that electrons are fermions and cannot all occupy the same energy state. For higher mass stars, the force of gravity is able to overcome this and push all the electrons into the ground state, and the star is supported by a different kind of degeneracy ... neutron degeneracy, which is the same thing but with neutrons ... and you get a neutron star. At even higher masses, even that isn't sufficient and the star collapses all the way into a black hole.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoIn the opposite direction, white dwarf stars are kept from collapsing completely by degeneracy pressure. Specifically, for white dwarf stars, it's electron degeneracy pressure, which arises from the fact that electrons are fermions and cannot all occupy the same energy state. For higher mass stars, the force of gravity is able to overcome this and push all the electrons into the ground state, and the star is supported by a different kind of degeneracy ... neutron degeneracy, which is the same thing but with neutrons ... and you get a neutron star. At even higher masses, even that isn't sufficient and the star collapses all the way into a black hole.
Wiki User
∙ 9y agoPressure helps a white dwarf from collapsing under its own weight. A white dwarf is the end state of a start. It has a mass that is less than four times that of the Sun.
Wiki User
∙ 9y agoA white dwarf star, as well as any other stable variety of star,
is held together by the pressure popularly known as "gravity".
Wiki User
∙ 13y agoSomething called degenerate pressure.
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Their rotation.
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Nuclear fusion produces heat, and heat creates the pressure which keeps the star from collapsing under its own gravity. The relationship between heat and pressure in a gas is described by the Ideal Gas Laws. It also applies to plasma (which can be described as a super heated gas).
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