New paper gravitomagnetism explains dark matter effects

In summary, there is an article discussing the relationship between galactic rotation and dark matter, proposing that GR's Gravitomagnetism could explain these effects without the need for dark matter. The validity of this idea is still being debated and may require further research for confirmation. Additionally, gravitomagnetic effects are not always attractive like gravity and can be more complex, similar to ordinary magnetism.
  • #1
kodama
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TL;DR Summary
Models of galactic rotation curves built of a general relativistic framework could use gravitomagnetism to explain the effects of dark matter
I'm not sure if this paper belongs in GR or astrophysics but

This articleG. O. Ludwig (2021), Galactic Rotation Curve and Dark Matter According to Gravitomagnetism, European Physical Journal C 81:186, DOI 10.1140/epjc/s10052-021-08967-3

there's no need for dark matter,as GR's Gravitomagnetism could explain galaxy rotation effects, similar in spirit to MOND, but using just plain GR.

could GR experts weigh in on this
 
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The basic idea of gravitomagnetic effects is valid; GR does predict them. The question is whether the paper's estimate of their magnitude for a rotating disk-shaped galaxy is correct. I think it will take some time for other researchers to check the work.
 
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  • #4
PeterDonis said:
The basic idea of gravitomagnetic effects is valid; GR does predict them. The question is whether the paper's estimate of their magnitude for a rotating disk-shaped galaxy is correct. I think it will take some time for other researchers to check the work.

is gravitomagnetic effects always attractive like gravity, and therefore add up?
 
  • #5
kodama said:
is gravitomagnetic effects always attractive like gravity

No. The effects in general are not as simple as just changing the magnitude of a central force. (That is also true of ordinary magnetism.)
 
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1. What is gravitomagnetism?

Gravitomagnetism is a theory that describes the effects of gravity on moving objects, similar to how a magnet affects other magnets or moving charged particles. It is a consequence of Einstein's theory of general relativity and explains how the rotation of a massive object can create a gravitational field that affects the motion of other objects around it.

2. How does gravitomagnetism relate to dark matter?

Dark matter is a mysterious substance that makes up a large portion of the universe's mass, but does not interact with light. Gravitomagnetism offers a possible explanation for the effects of dark matter, as the rotation of massive objects can create a gravitational field that mimics the effects of dark matter. This theory is still being studied and is not yet proven, but it offers a promising explanation for the observed effects of dark matter.

3. What does the new paper propose about gravitomagnetism and dark matter?

The new paper suggests that the effects of dark matter can be explained by the gravitomagnetic field created by the rotation of massive objects. This theory offers a potential solution to the long-standing mystery of dark matter and could provide a deeper understanding of the fundamental forces of the universe.

4. How does this theory differ from other explanations of dark matter?

There are many theories about the nature of dark matter, but gravitomagnetism is a unique approach that is based on the principles of general relativity. Other theories propose the existence of new particles or modifications to the laws of gravity, but gravitomagnetism offers a more elegant explanation that is consistent with our current understanding of the universe.

5. What implications does this theory have for future research?

If this theory is confirmed, it could have significant implications for our understanding of gravity and the structure of the universe. It could also lead to new ways of detecting and studying dark matter, which could provide valuable insights into the nature of this mysterious substance. Further research and experiments will be needed to fully test and validate this theory.

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