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Hawking radiation |
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Hawking radiationRadiation theoretically emitted from just outside the event horizon of a black hole. Stephen W. Hawking proposed in 1974 that subatomic particle pairs (photons, neutrinos, and some massive particles) arising naturally near the event horizon may result in one particle's escaping the vicinity of the black hole while the other particle, of negative energy, disappears into it. The flow of particles of negative energy into the black hole reduces its mass until it disappears completely in a final burst of radiation. |
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But Hawking radiation originates just outside the event horizon, not inside the hole. The high-energy gamma rays will be used to search for a variety of fundamentally new phenomena, such as particle dark matter and Hawking radiation from evaporating black holes. Despite the reputations of black holes for not letting even light escape (hence their blackness), a quirk of quantum mechanics causes them to emit so-called Hawking radiation, which makes them evaporate, scientists say. |
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