Series Expansion Newton Dark Matter

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SUMMARY

The discussion centers on the need for a series expansion of Newton's law of gravitation to account for observed discrepancies in star rotation around galaxies, which contradict Newtonian predictions. The proposed expansion takes the form F ≈ 1/r^2 + a/r^3, indicating a desire for a more nuanced understanding of gravitational forces. Jens, the original poster, emphasizes the importance of reliable experimental data rather than simplistic hypotheses like MOND (Modified Newtonian Dynamics). He acknowledges the complexity of galaxy geometry, which complicates the application of Newton's law.

PREREQUISITES
  • Understanding of Newton's law of gravitation
  • Familiarity with series expansions in physics
  • Knowledge of galaxy dynamics and rotation curves
  • Basic grasp of experimental data analysis in astrophysics
NEXT STEPS
  • Research the implications of MOND and its experimental validations
  • Study the geometry of galaxies and its effects on gravitational models
  • Explore recent papers on dark matter and galaxy rotation curves
  • Investigate alternative theories to Newtonian gravity in astrophysics
USEFUL FOR

Physicists, astrophysicists, and researchers interested in gravitational theories and dark matter phenomena will benefit from this discussion.

jensel
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Hi,

I hope you can help me. I am a physicist but not a researcher and have currently not the time to study many papers about the subject of dark matter. What I would need for deeper thoughts is an expansion in a series of the Newton law for cases where it has been measured that star rotation around a galaxy is in contrast to Newton.

Meaning: There should be something like

F ≈ 1/r^2 + a/r^3 + ...

I understand fully that the answer can't be that simple but please provide me with some information about the measured values and the uncertaincy in those measurements. Thanks a lot in advance.


Jens

PS, I edit this post: It ist not that I want to push a simple MOND hypothesis, I need reliable experimental data. Thanks a lot.
 
Last edited:
Astronomy news on Phys.org
I would like to remove this thread. I did not see the geometry of the galaxies. It is something not to be described in such an easy way. A 1/r^2 rule is only given for a point like mass center. I found out some material, sorry.
 

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