Discovering the interior of black holes: A arxiv paper..........

https://arxiv.org/pdf/1701.07444.pdf

Discovering the interior of black holes
25 Jan: 2017.

Abstract:
The detection of gravitational waves from black hole (BH) mergers provides an inroad toward probing the interior of astrophysical BHs. The general-relativistic description of a BH’s interior is that of empty spacetime with a (possibly) super-dense core. Recently, however, the hypothesis that the BH interior does not exist has been gaining traction, as it provides a means for resolving the BH information-loss problem. Here, we propose a simple method for answering the question: Does the BH interior exist and, if so, does it contain some distribution of matter or is it mostly empty? Our proposal is premised on the idea that, similar to the case of relativistic, ultra-compact stars, any BH-like object whose interior has some matter distribution should support fluid modes in addition to the conventional and universally present spacetime modes. In particular, the Coriolis-induced Rossby (r-) modes, whose spectrum is mostly insensitive to the composition of the interior matter, should be a universal feature of a BH-like object. In fact, the characteristic properties of these modes are determined by only the object’s mass and speed of rotation. The r-modes oscillate at a lower frequency, decay at a slower rate and produce weaker gravitational waves than do those of the spacetime class. Hence, they imprint a model-independent signature of a non-empty interior in the gravitational-wave spectrum resulting from a BH merger.



Conclusion:
We have argued that a BH-like object — an object that resembles a BH from the outside but with a different composition for its interior — can be discriminated from the BHs of GR on the basis of its r-modes. This follows from the observation that, in analogy to a relativistic star, the rmode spectrum should be essentially independent of the object’s composition, depending only on its mass and speed of rotation v to leading order in v/c.
Under suitable circumstances, the GWs originating from the r-modes should stand out clearly in the data, as their frequencies scale with the rotational speed of the BH-like object and their lifetimes are enhanced by a factor of (v/c) −2 . However, because the wave amplitude drops off quickly by a factor of (v/c) 3 , one is faced with two competing effects: The easier it is to separate the r-mode-induced GW frequency and lifetime from those induced by the spacetime modes, the weaker is their amplitude. Here, we have focused on answering the binary question: Are the BHs in Nature those of GR or are they not? If the latter is indeed true, further discrimination will be possible by looking at other classes of fluid modes, as most of these carry information about the interior composition already at leading order in frequency. In these cases, however, the theoretical predictions will necessarily be model dependent. We intend to present a detailed discussion on this [19] with regards to the collapsed-polymer model of a BH [12]. Other relevant works in this direction include [33, 34]. Finally, one might be concerned as to how interior fluid modes can couple to external GWs given that the outer surface of any candidate BH-like object must at least behave as an horizon and thus prevent matter and information from flowing outward. As this is an important issue in its own right, we intend to address it in a separate discussion [47].

 

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Interesting paper....
One aspect has me somewhat bemused.....
"Recently, however, the hypothesis that the BH interior does not exist has been gaining traction, as it provides a means for resolving the BH information-loss problem. Here, we propose a simple method for answering the question: Does the BH interior exist and, if so, does it contain some distribution of matter or is it mostly empty?"

We did have some professional replies a while back, on the fact that we are able to reasonably assert what is behind the EH [point of no return] of a BH.
As Kip Thorne says in his book, "Black Holes and Time Warps" and what I presumed was reasonable assertions and common knowledge, once inside the EH, all paths can only proceed in the one direction...towards the center.
So in essence a GR type BH simply consists of spacetime, critically warped, and of course any particles that happen to get sucked in on their way to the core.
I'm rather bemused at the question, "does the BH interior exist?" whether as dictated by GR or not. Whether simply just spacetime, it certainly exists, in my opinion, or does the writer infer something else?
Perhaps rpenner would like to give his view?

ps: Of course this is still a hypothetical paper in as much as investigations and research into r-modes are not viable as yet.

 

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Very interesting

I wonder with Black Holes how much of atoms inside are reduced in size?

Since most of the atom is empty space can they be compressed?

Having the empty space squeezed out of them and putting it altogether in the middle sounds feasible

So a Black Hole would be like a hollow Ping Pong ball with a varying sized shell (and needing a bloody big paddle to get it move)

As more mass is added to the Black Hole would the lining in direct contact with the hollow centre continue to constrict around the hollow region until no more constriction is possible causing a Big Bang???

How big would a Black Hole have to be for that to occur?

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Yes it is feasible. That is essentially what a neutron star is. In a neutron star the electrons are forced into the nucleus of the atoms making the star mostly neutrons.

Neutron Stars

 

Whatta whatta??!! Been on the piss again Michael?

 

No but I did leave my tin foil hat off for a while

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A careless thing to do

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. Tip - type 'black hole' into your search box. First entry I get looks good.

 

I got See Brixton London ?

Has Brixton London something to do with the Original Post?

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You must use a very odd - I guess tinfoil hat approved - search engine

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. I use StartPage, and get, first three hits in order:
https://en.wikipedia.org/wiki/Black_hole
https://www.nasa.gov/audience/forstudents/k-4/stories/nasa-knows/what-is-a-black-hole-k4.html
https://science.nasa.gov/astrophysics/focus-areas/black-holes
With plenty to follow, that make no reference to Brixton London afaik. Maybe you are hinting at an immigrant situation there? Just a wild guess.

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At a wild guess you have not heard of Poe

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As I recall exchemist inquired of your 'friend' Poe and was directed to e.g. http://www.urbandictionary.com/define.php?term=Poe's Law
Here's my addition: Pretty Obviously Excreta.
Feel free to get back to wildly speculating on interiors of the astrophysical kind of black hole as is claimed to exist by mainstream theorists and the rest of the follower herd.