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A black hole bomb is the name given to a physical effect utilizing how a bosonic field impinging on a rotating black hole can be amplified through superradiant scattering.If the amplified field is reflected back towards the black hole, the amplification can be repeated, leading to a run-away growth of the field, i.e. an explosion.
"The triple system could not have survived if the black hole was born with a natal kick, so this discovery tells us that at least some black holes form without a kick - implying a quiet implosion ...
Failed supernovae are thought to create stellar black holes by the collapsing of a red supergiant star in the early stages of a supernova. When the star can no longer support itself, the core collapses completely, forming a stellar-mass black hole, and consuming the nascent supernova without having the massive explosion. For a distant observer ...
Above this mass, the remnant collapses to form a black hole. [ 5 ] [ 17 ] The theoretical limiting mass for this type of core collapse scenario is about 40–50 M ☉ . Above that mass, a star is believed to collapse directly into a black hole without forming a supernova explosion, [ 18 ] although uncertainties in models of supernova collapse ...
A black hole with the mass of a car would have a diameter of about 10 −24 m and take a nanosecond to evaporate, during which time it would briefly have a luminosity of more than 200 times that of the Sun. Lower-mass black holes are expected to evaporate even faster; for example, a black hole of mass 1 TeV/c 2 would take less than 10 −88 ...
Researchers have shown it is theoretically possible that the pairs of black holes are being held in equilibrium by a cosmological force. Pairs of black holes could be hiding as one, scientists believe
That black hole happens to be Sagittarius A*, the one at the middle of the Milky Way. The finding not only sheds light on such stars, and how they might be able to survive such extreme environments.
A black hole with a mass of around 1 M ☉ will vanish in around 2 × 10 64 years. As the lifetime of a black hole is proportional to the cube of its mass, more massive black holes take longer to decay. A supermassive black hole with a mass of 10 11 (100 billion) M ☉ will evaporate in around 2 × 10 93 years. [45]