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- TL;DR Summary
- Are Schwarzschild black holes and Schwarzschild white holes the same astronomical object?
Well, my question arises because when one hears about black and white holes in divulgation, usually one hears that they are two kinds of "objects", the first one is a region that can only absorb things, and nothing can escape from it. While the latter is a region that only emits things and nothing can enter it.
Also when one studies the Schwarzschild solution one finds that for ##r<r_g## one can find that the solution predicts either a black hole or a white hole.
Now my question is, are these two objects the same? Or two different objects? If the usual picture of black/white holes as two completely different things one may see the Schwarzschild solution as having two possibilities, either it produces a BH or it produces a WH. But I don't see anything to "determine" which solution you are dealing with, Schwarzschild solution is one and only one, and therefore it seems to me that both, BH and WH should coexist in the same space-time region.
So technically, if we could see a region described by Schwarzschild metric, we would see an object that is not a black-hole in the sense that we would see light (and possibly matter) coming out of it, but at the same time, anything that falls inside it wouldn't be able to escape from it. Is this right? Or I'm missing something?
Also when one studies the Schwarzschild solution one finds that for ##r<r_g## one can find that the solution predicts either a black hole or a white hole.
Now my question is, are these two objects the same? Or two different objects? If the usual picture of black/white holes as two completely different things one may see the Schwarzschild solution as having two possibilities, either it produces a BH or it produces a WH. But I don't see anything to "determine" which solution you are dealing with, Schwarzschild solution is one and only one, and therefore it seems to me that both, BH and WH should coexist in the same space-time region.
So technically, if we could see a region described by Schwarzschild metric, we would see an object that is not a black-hole in the sense that we would see light (and possibly matter) coming out of it, but at the same time, anything that falls inside it wouldn't be able to escape from it. Is this right? Or I'm missing something?