What is the equilibrium of a black hole?
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What is the equilibrium of a black hole?
It is well known that the black hole can have temperature and radiate the particles with black body spectrum, i.e. Hawking radiation. Therefore, if the black hole is surrounded by an isolated box, there is a thermal equilibrium between the black hole and radiation gas.
Are black holes in thermal equilibrium?
It is commonly known in the literature that large black holes in anti-de Sitter spacetimes (with reflective boundary condition) are in thermal equilibrium with their Hawking radiation.
Do black holes have hydrostatic equilibrium?
An important perspective is that the inside of a black hole is very unlike a star. Stars, including white dwarfs with degenerate electrons and neutron stars with degenerate neutrons, are in hydrostatic equilibrium; the outward pressure gradients balance the inward pull of gravity.
What is Blackhole quantum?
Micro black holes, also called quantum mechanical black holes or mini black holes, are hypothetical tiny black holes, for which quantum mechanical effects play an important role. The concept that black holes may exist that are smaller than stellar mass was introduced in 1971 by Stephen Hawking.
Why is the inside of a black hole cold?
Black holes emit almost zero radiation, so are very cold, by definition. In fact, they are net absorbers of CMB photons that have an average temperature of 2.7 K. Since heat flows from hotter to colder bodies, black holes are colder than that.
Is a black hole a massive neutron star?
Black holes are astronomical objects that have such strong gravity, not even light can escape. Neutron stars are dead stars that are incredibly dense. Both objects are cosmological monsters, but black holes are considerably more massive than neutron stars.
What temperatures are black holes?
The black hole evaporates. The most massive black holes in the Universe, the supermassive black holes with millions of times the mass of the Sun will have a temperature of 1.4 x 10-14 Kelvin. That’s low. Almost absolute zero, but not quite.