Black holes might not be dead-ends after all

black hole
A black hole devouring a star. Credit: NASA

A physical body might be able to cross a wormhole in spite of the extreme tidal forces, suggests a new study by Rubiera-Garcia, of Instituto de Astrofísica e Ciências do Espaço (IA), and his team. This result, published on April 28 in the journal Classical and Quantum Gravity, is supported by the fact that the interactions between different parts of the body that hold it together are preserved. The team was invited by the journal editors to write an insight article that was published online today.

In their previous work, the authors arrived at theoretical descriptions of without a singularity, the bizarre and infinitesimally small point where space and time ends abruptly. What they found at the centre of a black hole, and without actually being in search of one, was a spherical and finite sized wormhole structure.

Diego Rubiera-Garcia, of IA and Faculdade de Ciências da Universidade de Lisboa, commented on how the team solved the singularity problem: "What we did was to reconsider a fundamental question on the relation between the gravity and the underlying structure of space-time. In practical terms, we dropped one assumption that holds in , but there is no a priori reason for it to hold in extensions of this theory."

Presented with this wormhole structure of finite size, where space and time continue past and beyond the black hole and into another part of the universe, the authors then inquired about the fate of a physical object venturing into it. They asked if a chair, a scientist, or a spacecraft would withstand the intense gravitational field and retain physical unity through the journey, and also to what extent that body would be damaged.

In their study, a physical body approaching a black hole is analysed as an aggregation of points interconnected by physical or holding it together.

"Each particle of the observer follows a geodesic line determined by the gravitational field. Each geodesic feels a slightly different gravitational force, but the interactions among the constituents of the body could nonetheless sustain the body," Rubiera-Garcia said.

General relativity theory predicts that a body approaching a black hole will be crushed along one direction and stretched along another. As the wormhole radius is finite, the authors demonstrate that the body will be crushed to the size of the wormhole. Instead of converging to an infinitesimal separation, the so-called singularity, geodesic lines will still be separated by a distance greater than zero.

In their work, the authors show that the time spent by a light ray in a round trip between two parts of the body is always finite. Thus, different parts of the body will still establish physical or chemical interactions and, consequently, cause and effect still apply all the way across the throat of the wormhole.

We can then imagine that finite forces, no matter how strong they would have to be, could compensate for the impact of the near and inside the wormhole on a physical body traversing it. At least, according to these study, the passage to another region of the universe might be feasible.

Francisco Lobo, of IA and Faculdade de Ciências da Universidade de Lisboa, leader of the Cosmology group at IA, said, "The authors' insights into the concepts of space-time singularities and curvature divergences are representative of the fundamental theoretical research carried out at the IA, going beyond Einstein's General Relativity. This research will also probably be important to understanding these difficult concepts for the fate of the universe in a plethora of cosmological models."

Explore further

The golden anniversary of black-hole singularity

More information: Gonzalo J Olmo et al. Impact of curvature divergences on physical observers in a wormhole space–time with horizons, Classical and Quantum Gravity (2016). DOI: 10.1088/0264-9381/33/11/115007

Gonzalo J. Olmo et al. Geodesic completeness in a wormhole spacetime with horizons, Physical Review D (2015). DOI: 10.1103/PhysRevD.92.044047

Journal information: Physical Review D

Provided by Institute of Astrophysics and Space Sciences
Citation: Black holes might not be dead-ends after all (2016, June 8) retrieved 17 October 2019 from
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User comments

Jun 08, 2016
Math fairies gone wild!

Jun 08, 2016
There is not one single atom of any kind ,that can keep its orbiting electrons traveling thru an environment over 100 million degrees, those will be stripped off those atoms, and bound in a gravity orbit, orbiting that mass, those neutrons and protons from its nucleus will fall into an high velocity orbiting particle plasma of neutrons and protons and be destroyed in high velocity kinetic collisions around that mass, and those quantum constructions that use to neutrons and protons will rain out of that storm onto the mass by gravity producing a quantum particle mass not any black hole, all those parts stay in this dimension the quantum particle dimension of space where they came from

Jun 08, 2016
Hows that for staying in mechanical particle physics reality,that the CCM is a cosmic particle accelerator that's its mechanics in the physical universe

Jun 09, 2016
How's that? It is one long run on sentence with peppered commas. Jibber jabber.

Jun 09, 2016
This site has become the goto place for the nutter fringe to spew. Thought provoking article and nothing but pseudoscientific delusions from idiots that love the sound of their own voice.

It's time to create a site that is what PO was before it was sold to the pimps.

Jun 09, 2016
We can then imagine that finite forces, no matter how strong they would have to be

Still, this might mean the forces required could be very large.
Also the asymmetry of forces might be an issue. E.g an asymmetric force applied within an atomic nucleus might well lead to radioactive decay in otherwise stable atoms, because the stability is not only dependent on forces between individual nucleons but the distribution (read summation) of forces accross the whole nucleus.

Jun 09, 2016
The forces in nuclei are magnetic forces between opposite charged quantum constructions of neutrons and protons , sealed in magnetic induction field by its orbiting electrons, its only a quantum construction of electrical charged particles thru magnetic forces , that's there mechanical connection

Jun 09, 2016
That nuclei need to be in an negatively charged induction environment to maintain their structural stability, like proton or neutron collisions in CERN are maintained from decay back into their quantum states thru a magnetic field vessel that there speed thru, free proton and neutrons can exist in a star or planet negatively charged magnetic field without orbiting electrons,by nuclei stability in space or gas clouds need their own orbiting electrons to maintain that structural stability outside of a proxy field

Jun 09, 2016
Math is a language if you show black holes exists in a math equation, but it doesn't take into account the structural limits of hydrogen atom based quantum constructions , then you get science fiction conclusions, an equation not based on all the parameters of structural limits and magnetics, if you have a neutron star made of compressed neutrons their is a whole lot of repulsion forces between those charges to maintain its structural stability that force needs countered by an equal force that is a positive dominant particle plasma amongst those neutrons of a plasma of positrons and electrons whose quantum mass and positive charge is equal to the negative charge of neutrons, to magnetically bond in magnetic compression, gravity is the by product of the that concentrated mass of magnetic compression, gravity is dependent on that for existence,

Jun 09, 2016
If you have two neutron stars in a high velocity collisions, they will break those magnetic bond in kinetic collisions, and you will have positrons electrons and neutrons those neutrons will be beaten apart just like in a particle accelerator and become positrons and electrons and gravity from the mass in the area will only be able to assemble mechanically a positron and electron magnetically bonded mass under magnetic compression of those charges into quantum particle mass of those parts bot a black hole

Jun 09, 2016
bscchott: Where is this anger from , you only like certified thinkers , with documented paper work for any consideration, quite crying and show your mechanical and magnetics thinking or any hypotheses that has any magnetic or mechanical possibilities in reality ,or just read and move on , particle mechanical,magnetic physics needs thinkers for discovery in knowledge

Jun 10, 2016
What's the magnetic opposite of a neutron star, in magnetic compression , its not a black hole sending the parts to an alternative dimension, its a positronic dominant charged mass of positrons and electrons,instead of a negatively dominant charged mass of neutrons,positrons and electrons

Jun 10, 2016
The hypotheses of the article are mechanically and magnetically impossible, and published by those that believe in black holes , that can't let go of their false knowledge, because how it would make them look, we can only point out a different model that is mechanically and magnetically possible with reason and logic outside of theirs

Jun 10, 2016
These physicists have been brought up in universities and brainwashed into believing in black holes without a comparative model to even comprehend, against! Its doctrine from Einstein,Planck, and Maxwell , but even smart people have limited mechanical and electrical charge knowledge nobody is 100 percent right on everything, even if I was wrong on my hypotheses at least people can think outside of their box ,in mechanical and electrical charged particle physics'

Jun 10, 2016
I just seen this article on Russian television news and the world can read read the comments on this ha

Jun 13, 2016
This comment has been removed by a moderator.

Jun 13, 2016
bschott, in a way you're specifically right. The work here may not bear any relation to things that happen in our universe. But more generally you're missing the entire point. A lot of theoretical work isn't to just figure out how our universe is or works, but what the 'known' laws of our universe can imply more broadly.

For instance, work in a specific branch of GR (Anti deSitter spacetime) doesn't necessarily describe our universe. But it was found out that the same maths are a useful tool for doing work in strong force physics. (The AdS-CFT correspondence). Science is about curiosity, and sometimes that curiosity goes into directions that are directly applicable to something we may observe, and sometimes it's curiosity about a thing that may be implied by some aspects of the theory while ignoring other parts.

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