Hawking Radiation is theoretical but has never been observed. A team of researchers think they've found a way: with 'morsel' black holes.
Nothing lasts forever, including black holes. Over immensely long periods of time, they evaporate, as will other large objects in the Universe. This is because of Hawking Radiation, named after Stephen Hawking, who developed the idea in the 1970s.Black hole mergers were predicted long ago but never observed. Theory showed that these mergers should release powerful gravitational waves. Finally, in 2015, the LIGO observatory detected the first merger. Now, scientists have detected many of them.
The HR coming from these small BHs produces gamma rays with a particular “fingerprint” of high-energy photons. When black hole morsels evaporate, they emit particles in a spherically symmetrical pattern. As long as the larger merged BH is not blocking their view, the HR particles should reach us. The photon energy from the bursts exceeds the trillion-electron volt scale.
Many questions remain. The authors say that these morsel BHs will emit the most energy close to their time of evaporation. But when morsel BHs are emitted in the intense gravitational environment of a BH merger, their Hawking Radiation may be affected. The same is true if the morsels are emitted at relativistic velocities. Both of those factors could alter their spectra before they reach our detectors.where things break down due to our lack of understanding.
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