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Natural Science Forum / Physics / Particle Physics / March 2005Question regarding Hawking radiation
Hawking says that a black hole will eventually evaporate. This happens due to the spontaneous emergence of particle / anti-particle pairs near the event horizon. In some cases, the anti-particle part of the duo gets pulled into the black hole, therby reducing the mass of the black hole, and the real particle travels off into the universe to be observed as radiation. My question is, why does.t the converse happen just as often, why doesn't the real particle sometimes go into the black hole contributing to its mass, and the ant-particle emitted into the universe to anhilate with a real particle? > Hawking says that a black hole will eventually evaporate. I think that in the present Universe Hawking's radiation DOES NOT EXIST, but I'am not sure did it exist or did it not exist in the primordial Universe "before" when those mass exchage places (two per "radiation periphery") started to work ? Hannu Dear h.poropudas: >> Hawking says that a black hole will eventually >> evaporate. [quoted text clipped - 5 lines] > places (two per "radiation periphery") started > to work ? There was a thread in sci.astro earlier (less than a week), where "dual black holes" (not exactly the same as a classical BH), was created, did absorb particles, and did evaporate via EM (Hawking) radiation. Hawking radiation appears to be a vaild, experimentally reproducable mechanism for BH evaporation. Think again. David A. Smith > Dear h.poropudas: > [quoted text clipped - 16 lines] > > David A. Smith I took a look about that thread you mentioned. I think that it has nothing to do with Hawking's radiation. Hannu Dear >> Dear h.poropudas: >> [quoted text clipped - 20 lines] > I think that it has nothing to do with Hawking's > radiation. Let's see... "like a black hole" <QUOTE> This fireball, which lasts just 10 million, billion, billionths of a second, can be detected because it absorbs jets of particles produced by the beam collisions. <END QUOTE> Gold nucleii have been slammed together before, and the characteristic particles are well known. Once the energy is increased to this level, those particles are reduced by a factor of 10. "like Hawking radiation" <QUOTE> The Brown researcher thinks the particles are disappearing into the fireball's core and reappearing as thermal radiation, just as matter is thought to fall into a black hole and come out as "Hawking" radiation. <END QUOTE> I do note they don't discuss (in that article) about measuring or observing an anomalous temperature increase. URL:http://news.bbc.co.uk/2/hi/science/nature/4357613.stm Not much more salient to this point in: URL:http://arxiv.org/abs/hep-th/0501068 ... or the underlying paper. You are entitled to your opinion. David A. Smith |
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