Well, not trying to sound smarter than I am or anything, but honestly, I have understood the answers given to me thus far, and the papers I have posted, etc. (With some hard thinking) It might take me awhile but I do feel confident after I get it/have been convinced.
I understand what you...
Great! Thank you, and thank you all too! I understand it now. This is what I assumed but I was just clarifying/unsure. Now, not to ask more questions or take up anybody's time, but along with these two solutions the Schwarzschild exterior can always be matched with the spherically symmetric...
Ok, then... How? I really don't get that. In the paper: A New Interior Schwarzschild Solution by P.S Florides, it states: "The most celebrated exact solution of Einstein's vacuum field equations is the Schwarzschild (exterior) solution...It represents the grav. field in the exterior of a...
Oh, I'm sorry all, I didn't know it was coming off like that. Thanks for letting me know! (it was just supposed to kinda point out certain things that I don't get. I wasn't questioning his authority, just wondering for myself, because I am ignorant in this subject. By the way, if that ever...
So they are describing the exterior solution? Kind of like when the schwarzschild exterior solution describes the singularity at r=0 even though it is the EXTERIOR and not the INTERIOR?
Is this the interior/internal and exterior/external argument?
I've never heard that before. Papers I have read before on Schwarzschild interior/exterior solutions clearly say that the interior Schwarzschild solution represents a static, spherically symmetric mass of imcompressible fluid at rest...
The Schwarzschild metric is a spherical static structure, but it describes a black hole. It is not possible in reality, but it is the most well known and simplest (black hole) metrics out there. If the paper is talking about resolving the singularity and the information paradox at r=0, than it...
Ah! Thank you. I suspected this, but since I thought little of it and probably went to fast as to make myself think it was a black hole I missed it. Do you know of any non singular black hole interior solutions?
EDIT---
How is it not a black hole solution, if the are getting rid of the...
Yeah, I assumed that much. No, sadly its not on ArXiv... I was just posting to see if anyone has read it and knows the solution. It really stinks too that it only shows one page because there is only two.
Thanks
Has anyone read this paper? If so, what is the interior solution it describes?
A non singular solution for spherical configuration with infinite central density
Fuloria, Pratibha; Durgapal, M. C.
Astrophysics and Space Science, Volume 314, Issue 4, pp.249-250
Abstract: A non-singular exact...
So what your saying is the exterior solution describes all of the black hole, and the interior solution describes all of the black hole, sorta? Then if thats true, why would there be an exterior AND an interior solution? According the Brian Koberlein...
By the way everyone, I apologize if any of my questions/comments seem elementary at times, I am only 13. So I'm just letting you all know. Although the physics level for my age is pretty low, I do understand a lot, so I hope now that I have told you all you won't give me too much of an...
Yes, I know about the energy conditions. I'm just asking about this and learning more about it because I am very interested in learning about non singular black holes. Here's a cool article that got me interested in asking PF this...
Ok PAllen... I think I have it! (And yes, the scientific papers I have read are very vague and I probably did miss something)
If I find a perfect fluid interior solution and the Schwarzschild exterior solution, I can paste them smoothly together above the event horizon in order to develop a non...
I know you posted this a while back but I was just reading through again. So what your saying, is if you paste them together above the event horizon, it is describing a star. I want to describe a black hole. A nonsingular black hole more specifically. From what I have gathered, I can paste a...
Yes... I read that right after I asked the previous question. I'm sorry. But this is a statement in 4.2 (page 98) that I don't understand:
"Statement 1: An event horizon is a null surface whose generators
are null geodesics without future endpoints, except if
a generator hits a singularity...
I understand most of what you are saying now. But... (I'm sorry to keep asking questions) WHY does there have to be an essential singularity within the event horizon. You said nothing that shows one is required, or am I missing something? You might of said it I'm just missing it. Thanks
I know it is not apparent I just referred to it as apparent because I was not sure about the singularity in the exterior solution (that was what my original question was about) but yes, I know it is a real physical entity there, not apparent.
Sorry to keep stretching the same question, but from...
I mean the apparent singularity at r=0 described in the Schwarzschild exterior solution. Would it affect a non singular black hole model (consisting of some kind of non singular interior solution and the Schwarzschild exterior solution)
As in, could the model still be non singular if I take...
Evolve? What theorems state that? (I'm not questioning you, I'm just wondering)
You said "If you do it at the event horizon", is there another way to do it (place to do it) Besides the event horizon, or did I just interpret how you said it wrong?
Yes, the Penrose Hawking theorem does say that naked singularities, which is what they call singularities with no event horizon to "cover" cannot exist, there is no such thing as naked singularities in that theorem. You can have a Schwarzschild black hole, with an event horizon, and infinite...
Thanks to both of you, I am beginning to understand more. Now, I don't know if you know this too, but say you wanted to create a non singular Schwarzschild black hole model.
If you somehow found a non singular interior solution, could you smoothly paste it to the exterior solution (ignoring the...
Yes I know that, but what about the singularity in the exterior solution, if it is specifically an exterior solution "cut off from the interior" if it has to be, why does it have a singularity at r=0 EVEN if it doesn't even go "deep" enough to describe r=0, it just goes to the event horizon...
This might be a silly question to people who are have more practice in this subject, but how does the Schwarzschild Solution/metric have a singularity at r=0 if it is only valid outside the gravitational mass (black hole)? wouldn't that be in the interior solution, describing the inside of a...
Could it be that there is no way to unite quantum physics and (non quantum) physics, could that be why there has been so many problems and controversy over string theory?
This would just help me understand string theory more and possibly help out my "pet theory"
_ev