Black hole 'hair' could be detected using ripples in spacetime

Jan 3, 2020
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Hair may record the information swallowed by the gravitational monsters.

Black hole 'hair' could be detected using ripples in spacetime : Read more
This is odd. I though we hade already reached out by gravitational waves to touch the event horizon in a peculiar system of orbiting black holes with accretion disks, and found "no hair". But the new paper doesn't mention that observation at all.
Previous studies have been made of OJ 287 that have accounted for gravitational waves, but the 2018 model is the most detailed to date. By factoring information gained by LIGO since 2015 into this model, the team was able to narrow the window in which a flare is expected to just 1.5 days. To further refine their predictions, they also included details about the larger black hole’s physical characteristics.

Specifically, the new model incorporates the “no-hair” theorem of black holes, a theory originally proposed in the 1960s by a team of physicists that included Stephen Hawking. This theorem predicts that the “surface” of a black hole – or rather, their outer boundary (aka. event horizon) – is entirely symmetrical along its rotational axis. This further narrowed the team’s predictive model to just a few hours.

By predicting the smaller black hole’s orbit with this level of precision, the new model supports the no-hair theorem.
In short, the OJ 287 system supports the idea that black hole surfaces are symmetrical along their rotational axes. “It is important to black hole scientists that we prove or disprove the no-hair theorem,” said Mauri Valtonen, an astrophysicist from the University of Turku and a coauthor on the paper. “Without it, we cannot trust that black holes as envisaged by Hawking and others exist at all.”
[ https://www.universetoday.com/145935/supermassive-black-hole-orbits-an-even-more-massive-black-hole-crashing-through-its-accretion-disk-every-12-years/ ]
 
Jan 3, 2020
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And even more curious, I thought the firewall physics paper show that information is radiated away by way of the same low energy effective field theory that the "no hair" paper show is valid [ https://arxiv.org/abs/1207.3123 ]. The firewall would make the black hole consistent with "no hair", was my (poor) understanding.
 
Aug 22, 2020
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IMHO, there cannot be such objects as singularities (0 size & infinite density) in the real universe!
Everything should/must be made of particles (including black holes)!
& if black holes should/must be made of particles, then there is only 1 realistic possibility: Planck particle! (No other real/theoretical particle can be a realistic possibility, because it should/must be a particle that is itself (like) a tiny black hole! (For example, consider how a neutron star is really like a giant neutron, because it is made of neutrons!))

From Wikipedia:
"A Planck particle, or planckion, named after physicist Max Planck, is a hypothetical particle defined as a tiny black hole whose Compton wavelength is equal to its Schwarzschild radius. Its mass is thus approximately the Planck mass, and its Compton wavelength and Schwarzschild radius are about the Planck length."

Of course, the huge questions is how this idea can be proven or disproven?!

Maybe gravitational waves are discrete in units of Planck mass/energy?
(& if so then someday it maybe possible to detect this, when sensitivity/resolution of GW detectors are good enough!)
 
Jan 3, 2020
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IMHO, there cannot be such objects as singularities (0 size & infinite density) in the real universe!
Everything should/must be made of particles (including black holes)!
& if black holes should/must be made of particles, then there is only 1 realistic possibility: Planck particle!
But that particle is just a variant of singularity as far as I can see, and there is no Planck energy scale field that would carry it.

There are lots of ways to avoid Planck energy scale singularities, such as (I think) the dark energy black hole models would do. We already know that the slow roll scalar inflation field that the Planck collaboration observed 2018 [the 2018 cosmological parameter paper in Planck Legacy Archive] avoids Planck energy scales before the later local hot big bang.
 
Feb 28, 2020
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Hair may record the information swallowed by the gravitational monsters.

Black hole 'hair' could be detected using ripples in spacetime : Read more
Existence is eternal. We are here, surrounded by matter and order because no process has ever destroyed it. Including black holes in previous big bang contents. Order even survived coming through our Big Bang. Order can't be created or destroyed. This all goes to show that one day all that went into black holes will come out again, both matter and order.
 
Aug 22, 2020
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"But that particle is just a variant of singularity as far as I can see"

Imagine, if we did not know what neutron stars are made of & neutrons were just theoretical particles & someone like you were saying (against suggestion of neutron stars maybe made of neutrons) "but that particle is just a variant of a neutron star"!!!

& you should have said "But that particle is just a variant of Black Hole as far as I can see"!!!
Because, how is that exactly, a Planck PARTICLE is a singularity???
Or must have a singularity???
We certainly do not have any evidence that real Black Holes contain singularities!!! Why should a Planck PARTICLE must have a singularity???
 
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