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lanky
  • lanky
  • Advanced Member Topic Starter
16 February 2023 08:58:06
Dark Energy has long been postulated as the reason that the universe continues to expand at an ever increasing rate of acceleration when according to the "known" mass and energy content it should be collapsing under its own gravity

A large team of researchers have identified trhe source of this extra hidden "Dark Energy" as within Black Holes

https://www.imperial.ac.uk/news/243114/scientists-find-first-evidence-that-black/ 

It has long been known that Black Holes can increase in mass via the accretion of stars which come too close or other black holes via merging but when a detailed analysis of the weight of black holes was done, it was found that the weight increaed over time by a much larger value than could be explained by accretion.

The timeline was discovered by studing "dead" galaxies both very far away (i.e young dead galaxies) and very near (old dead galaxies) to compare the size of the black holes at the centre and discovered that the old galaxies' Black Holes were very much heavier. This was postulated as the addition of extra "Vacuum Energy"  which was identified as the missing Dark Energy

I did not know what "Vacuum Energy" was so I asked ChatGPT and this is what I got when I typed "Explain Vacuum Energy in Black Holes"

The concept of "black hole vacuum energy" is a bit complex and requires some background knowledge about quantum field theory and general relativity. In quantum field theory, the vacuum state of a field is not truly empty but contains a fluctuating, virtual energy called vacuum energy.
When general relativity is taken into account, the presence of mass and energy curves spacetime, and the curvature of spacetime influences the behavior of matter and fields. This means that even the vacuum energy can contribute to the curvature of spacetime.
In the case of a black hole, the extreme curvature of spacetime near the event horizon can cause virtual particle-antiparticle pairs to be created, with one particle falling into the black hole and the other escaping. This process is known as Hawking radiation, and it causes the black hole to lose mass over time.
However, as the black hole loses mass, its event horizon also decreases in size, and the curvature of spacetime near the event horizon increases. This means that the black hole's vacuum energy also increases, contributing to the overall curvature of spacetime.
The exact nature and behavior of black hole vacuum energy is still an active area of research, and there is much that remains to be understood.




 
Martin
Richmond, Surrey
Gandalf The White
17 February 2023 20:32:34

Dark Energy has long been postulated as the reason that the universe continues to expand at an ever increasing rate of acceleration when according to the "known" mass and energy content it should be collapsing under its own gravity

A large team of researchers have identified trhe source of this extra hidden "Dark Energy" as within Black Holes

https://www.imperial.ac.uk/news/243114/scientists-find-first-evidence-that-black/ 

It has long been known that Black Holes can increase in mass via the accretion of stars which come too close or other black holes via merging but when a detailed analysis of the weight of black holes was done, it was found that the weight increaed over time by a much larger value than could be explained by accretion.

The timeline was discovered by studing "dead" galaxies both very far away (i.e young dead galaxies) and very near (old dead galaxies) to compare the size of the black holes at the centre and discovered that the old galaxies' Black Holes were very much heavier. This was postulated as the addition of extra "Vacuum Energy"  which was identified as the missing Dark Energy

I did not know what "Vacuum Energy" was so I asked ChatGPT and this is what I got when I typed "Explain Vacuum Energy in Black Holes"

The concept of "black hole vacuum energy" is a bit complex and requires some background knowledge about quantum field theory and general relativity. In quantum field theory, the vacuum state of a field is not truly empty but contains a fluctuating, virtual energy called vacuum energy.
When general relativity is taken into account, the presence of mass and energy curves spacetime, and the curvature of spacetime influences the behavior of matter and fields. This means that even the vacuum energy can contribute to the curvature of spacetime.
In the case of a black hole, the extreme curvature of spacetime near the event horizon can cause virtual particle-antiparticle pairs to be created, with one particle falling into the black hole and the other escaping. This process is known as Hawking radiation, and it causes the black hole to lose mass over time.
However, as the black hole loses mass, its event horizon also decreases in size, and the curvature of spacetime near the event horizon increases. This means that the black hole's vacuum energy also increases, contributing to the overall curvature of spacetime.
The exact nature and behavior of black hole vacuum energy is still an active area of research, and there is much that remains to be understood.




 

Originally Posted by: lanky 



Interesting but I have the same feeling as when I read ‘A Brief History of Time’, and didn’t finish it.
Location: South Cambridgeshire
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52.0N 0.1E


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