I  Hawking Radiation: Can Particles Appear with Relativistic Velocities?

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Hawking radiation arises from particle pairs, such as electrons and positrons, that spontaneously form near a black hole's event horizon due to intense gravitational fields. One particle is captured by the black hole while the other escapes, effectively reducing the black hole's mass. The discussion highlights that the notion of these particles escaping with relativistic velocities is misleading, as virtual particles do not possess speeds. Critics argue that the initial premise of the discussion is based on a flawed understanding of the mathematics involved. The thread concludes with a suggestion for further reading to clarify these concepts.
Mike Holland
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The Hawking radiation comes from a pair of complementary particles, an electron and a positron for example, coming into existence spontaneously near the event horizon as a result of the intense gravitational field. One particle gets captured by the Black Hole while the other escapes, taking a bit of the BH mass with it. The mass of the two particles is "borrowed" from the BH.

My problem is that in order to escape. that particle must come into existence already moving radially outwards at close to the velocity of light, otherwise it cannot overcome the gravity. Do these particles really pop into existence with relativistic velocities?
 
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Well, your first paragraph is not true: it is a story to help make sense of the mathematics. So asking about the details is kind of pointless.
 
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Is it pointless to suggest that to escape from near the event horizon one has to have a velocity close to c?
 
I looked at your past posts. You've spent years tossing these random what-ifs at us. In that time, you could have learned GR.

And yes, what you write is pointless. Meaningless, actually. Virtual particles do not have speeds. Further, you missed an important point I wrote: your first paragraph is not true: it is a story to help make sense of the mathematics. Asking us to flesh out the details of something that is not true wastes everybody's time.
 
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Vanadium 50 said:
Asking us to flesh out the details of something that is not true wastes everybody's time.
Agreed; thread is closed. The OP's profile page says that he has a BS in Physics, so he should be able to do a bit more reading to figure this out. Maybe he'll do that reading and start a new thread with some current journal references if he still is having issues understanding the math behind Hawking radiation. :wink:
 
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In Birkhoff’s theorem, doesn’t assuming we can use r (defined as circumference divided by ## 2 \pi ## for any given sphere) as a coordinate across the spacetime implicitly assume that the spheres must always be getting bigger in some specific direction? Is there a version of the proof that doesn’t have this limitation? I’m thinking about if we made a similar move on 2-dimensional manifolds that ought to exhibit infinite order rotational symmetry. A cylinder would clearly fit, but if we...

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