Are Saturn's Rings Caused by Fractal Structures?

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Discussion Overview

The discussion centers around the causes and stability of Saturn's rings, particularly in relation to a recent paper proposing a fractal theory. Participants express curiosity about the implications of this theory and its relation to historical work on the topic.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants mention a recent paper by Mikhail Zelikin that suggests a fractal structure may explain the partitioning of Saturn's rings into sub-rings, referencing the theorem of Zelikin-Lokutsievskiy-Hildebrand.
  • Others express uncertainty about the stability of Saturn's rings, noting that the paper does not claim to have solved the stability problem but raises questions and proposes ideas for further research.
  • Historical context is provided by references to James Clerk Maxwell's work on the stability of Saturn's rings, highlighting his contributions and the mechanical model he developed.
  • Some participants find the mathematical aspects of the paper challenging and seek further explanations or critiques of the differential equations presented.
  • There is mention of satellite resonance influences and their potential effects on the ring structures, as discussed in related literature.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the implications of the fractal theory or the overall understanding of Saturn's rings. Multiple competing views and uncertainties remain regarding the stability and causes of the rings.

Contextual Notes

Limitations in understanding arise from the complexity of the mathematical models discussed, as well as the historical context that may not fully encompass current theories. Some participants express difficulty in following the technical details of the paper.

Jimster41
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It's very recent, but it discusses the question of cause of and stability of Saturn's and other ring systems. I came to this site wondering about them. I got the impression from answers received here they were well understood? This paper seems to suggest there are a number of big questions, and has some interesting (if a bit exotic) ideas about what's going on with them. Anyone heard of the guy?

I'm interested in other references to the topic.

The fractal theory of the Saturn Ring
Mikhail Zelikin
(Submitted on 9 Jun 2015)
The true reason for partition of the Saturn ring as well as rings of other planets into great many of sub-rings is found. This reason is the theorem of Zelikin-Lokutsievskiy-Hildebrand about fractal structure of solutions to generic piece-wise smooth Hamiltonian systems. The instability of two-dimensional model of rings with continues surface density of particles distribution is proved both for Newtonian and for Boltzmann equations. We do not claim that we have solved the problem of stability of Saturn ring. We rather put questions and suggest some ideas and means for researches.
Comments: 19 pages, 1 figure
Subjects: Dynamical Systems (math.DS); Mathematical Physics (math-ph)
Cite as: arXiv:1506.02908 [math.DS]
(or arXiv:1506.02908v1 [math.DS] for this version)

http://arxiv.org/abs/1506.02908
 
Astronomy news on Phys.org
https://www.researchgate.net/profile/Ralf_Srama/publication/42345171_An_evolving_view_of_Saturn%27s_dynamic_rings/links/00b4951d46424cb9d3000000.pdf
 
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Jimster41 said:
It's very recent, but it discusses the question of cause of and stability of Saturn's and other ring systems. I came to this site wondering about them. I got the impression from answers received here they were well understood? This paper seems to suggest there are a number of big questions, and has some interesting (if a bit exotic) ideas about what's going on with them. Anyone heard of the guy?

I'm interested in other references to the topic.

The fractal theory of the Saturn Ring
Mikhail Zelikin
(Submitted on 9 Jun 2015)
The true reason for partition of the Saturn ring as well as rings of other planets into great many of sub-rings is found. This reason is the theorem of Zelikin-Lokutsievskiy-Hildebrand about fractal structure of solutions to generic piece-wise smooth Hamiltonian systems. The instability of two-dimensional model of rings with continues surface density of particles distribution is proved both for Newtonian and for Boltzmann equations. We do not claim that we have solved the problem of stability of Saturn ring. We rather put questions and suggest some ideas and means for researches.
Comments: 19 pages, 1 figure
Subjects: Dynamical Systems (math.DS); Mathematical Physics (math-ph)
Cite as: arXiv:1506.02908 [math.DS]
(or arXiv:1506.02908v1 [math.DS] for this version)

http://arxiv.org/abs/1506.02908
James Clerk Maxwell worked on the structure and stability of the rings in 1857 and won the Adam's Prize at Cambridge for his work. His public paper was published in 1859 "On the Stability of the Motion of Saturn's Rings". He also made a mechanical model showing the particles having four modes of vibration. Sorry, that's all I know.
 
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tech99 said:
James Clerk Maxwell worked on the structure and stability of the rings in 1857 and won the Adam's Prize at Cambridge for his work. His public paper was published in 1859 "On the Stability of the Motion of Saturn's Rings". He also made a mechanical model showing the particles having four modes of vibration. Sorry, that's all I know.

Yeah, the paper refs LaPlace, Boltzmann and that very Maxwell paper, he then works through a Boltzmann model, applies the stationary (non-time dependent) Maxwell solution, then "proves" the solutions cannot explain observation.

P.12 "Hence the steady state surface density in two-dimensional model B cannot be smooth relative to the space variables"

I couldn't follow his Diff EQ but I got some of it. I'd be interested in hearing a real explanation and critique of it.

The paper DrCourtney linked is from 2010, but does reference the "as yet undetected satellite resonance influences" something like that. Which seems to be where he's coming from.

The gist of his theory has to do with the polyhedron of satellites and their effect, and solutions to the Boltzmann model related to the "Fuller Problem" and "Pontryagin type Hamiltonian Problems" page 15 is totally Greek to me. Wish I understood it. The "Concluding remarks" section is wild. He quotes Maxwell at the end. It seems like a wild paper, but I want to understand how far our understanding is advanced, what is and isn't well understood.
 
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