Elastic and Inelastic Scattering in Orbital Clustering

Baxter, David C.; Thompson, William B.

doi:10.1086/152229

Cited by 41 publications

(7 citation statements)

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“…It is not at all clear, in fact, that Mars' satellite system should be regarded as regular in the sense of representing an expected system. Baxter and Thompson [1973]. In their analysis they have neglected the dispersive effect of gravitational interaction and assumed an a priori velocity dispersion among the particles.…”

Section: Thus In Order To Obtain the Results Of About 100 Moon Size Bomentioning

confidence: 99%

“…69-89]. Since the equilibrium is normally approached from below, in the absence of a temporary driving mechanism to force the random velocity distribution above its normal equilibrium the jet stream effect described by Baxter and Thompson [1973] would not apply to the accumulating proto-planetary cloud. In the…”

Section: Thus In Order To Obtain the Results Of About 100 Moon Size Bomentioning

confidence: 99%

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Dynamics of Lunar Origin and Orbital Evolution

Kaula¹,

Harris²

1977

1977, Reviews of Lunar Sciences

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The considerable differences in bulk composition of the moon and the earth have led most investigators to favor the capture hypothesis of lunar origin. However, upon closer examination all forms of the hypothesis still seem much less plausible dynamically than formation by accretion,. i.e., acquisition of the moon in many small pieces rather than as predominantly one body. Models of accretion do suggest that the proto-lunar matter had a significantly different history from the proto-earth matter. A better understanding of collisions is needed to infer the compositional consequences of this history. Recent work on the acceleration of the moon's orbit exacerbates the time scale problem of orbital evolution. However, it now is much clearer that the locus of tidal dissipation is in the oceans and hence that the solution to the time scale problem lies in differing oceanic configurations in the past. This review is an updating of an article by Kauta [1971]. statistics of the most ancient craters indicate the mass Since then there has been a considerable sharpening of the distribution of forming planetesimals, as was suggested by compositional constraints, based mainly on data generated by Baldwin [1974]. the Apollo project. There also has been some work on the Geophysical data pertaining to the lunar interior also place more general problem of solar system origin, which is constraints on origin circumstances. The slight attenuation of necessarily the context for origin of the moon. seismic waves indicates a lithosphere 1000 km thick surround-The long-standing problem of the low density of the moon ing an asthenosphere that is only 10% of the moon's mass relative to that of the earth has been firmly resolved as being [Toks;Sz et at., 1974]. Within this asthenosphere a denser core caused by a deficiency in iron. Indeed, the permeability of the of 400-km radius has been inferred [Nakamura et at., 1974], moon inferred from magnetometry [Dyat et at., 1974] and the close to the upper limit allowed by the moment of inertia indication that the lunar mantle is olivine from seismic wave [Kauta et at., 1974]. Reasonably consistent with these findings velocity models [Nakamura et at., 1974] imply an iron content are internal temperatures inferred from a combination of lunar of only 6%, compared to 30% in the earth and meteorites. If interaction with the solar wind [Dyat et at., 1974] and the mantle is assumed to be pyroxene, the lunar iron content laboratory measurement of the temperature dependence of becomes 13% [Dyat et at., 1974]. ' electrical conductivity [Duba et at., 1974]. It appears that Additional major constraints generated by the Apollo radioactive heat sources have been removed from the outerchemical data are that the moon as a whole is severely depleted most 1000 km, only the central asthenosphere now being in volatiles and considerably enriched in refractory silicates. heated to partial melting. Because of the need for a crust thick enough to compensate 6km mare-terra height differences isostatically [Kauta et at., ...

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Section: Thus In Order To Obtain the Results Of About 100 Moon Size Bomentioning

confidence: 99%

Section: Thus In Order To Obtain the Results Of About 100 Moon Size Bomentioning

confidence: 99%

Dynamics of Lunar Origin and Orbital Evolution

Kaula¹,

Harris²

1977

1977, Reviews of Lunar Sciences

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“…] around central magnetized gravitating bodies at cosmogonic times, was that highly inelastic collisions between nearby coorbital particles would cause the orbits to become more equal [Alfv•,n, 1954; see also AlfWn and Arrhenius, 1976]. This so-called 'negative-diffusion' of an inelastically collisional set of nearby coorbital particles, which has subsequently been quantitatively demonstrated by Baxter and Thompson [1973], could also be the cause of the ringlet structure that is observed.…”

Section: Electrodynamicsmentioning

confidence: 97%

Charged dust in Saturn's magnetosphere

Mendis¹,

Hill²,

Houpis³

1983

J. Geophys. Res.

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Gravito‐electrodynamic theory of charged dust grains is used to explain a variety of phenomena in those portions of the Saturnian ring system that are known to be dominated by fine (micron and submicron‐sized) dust, and in which collisional forces and Coulomb drag can be neglected. Among the phenomena discussed are the formation and evolution of the rotating near‐radial spokes in the B‐ring, the formation of waves in the F‐ring, the cause of eccentricities of certain isolated ringlets, and the origin and morphology of the broad diffuse E‐ring. Several novel processes predicted by the gravito‐electrodynamic theory, including ‘magneto‐gravitational capture’ of exogenic dust by the magnetosphere, ‘1:1 magneto‐gravitational orbital resonances’ of charged dust with nearby satellites, and ‘gyro‐orbital resonances,’ are used to explain individual observations. The effect of a ring current associated with this charged dust is also evaluated. Finally, the cosmogonic implications of the magneto‐gravitational theory are briefly discussed. While several (although not all) of these processes have been discussed by one or more of the present authors elsewhere, the purpose of this paper is to synthesize all these processes within the framework of gravito‐electrodynamics, and also to show its range of applicability within Saturn's ring system.

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“…Prior to the closest approach, there was an increase in the moment of force, followed by a subsequent decrease. This leads to a negative correlation between the two orbit segments [29]:…”

Section: Disorder Effectmentioning

confidence: 99%

Dark matter effects explanation with the torsion in the Minkowski space

Romanets

2024

Class. Quantum Grav.

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Introduction: Investigating rotation curves and the Tully-Fisher ratio within galaxies represents a central theme of extensive research and scientific interest. Despite several theoretical models, a comprehensive explanation of the observed correlation between galaxy types and their rotation curves remains elusive. This study endeavors to bridge this knowledge gap by delving into the discernible connection between the presence of dark matter and galaxy classification.Theoretical background: By meticulously examining the gravitational field's dependency on its source's point symmetry, we introduce a novel theoretical framework that offers a coherent rationale for these empirical findings. Results: Our proposed model explains the appearance of dark matter as a direct consequence of the reduction of point symmetry in gravitational systems. Neither arbitrary systems with a high mass density nor a perfectly spherically symmetric mass distribution give the observable effects of dark matter. Special attention was paid to the axial symmetry scenario as a reasonable approach for modeling the mass distribution in most galaxies. We thoroughly analyzed, showing strong agreement with experimental observations for dwarf, Sb, and Scd galaxies. Conclusion: Thus, our study provides a compelling theoretical foundation for elucidating the intricate interplay between galaxy types, rotation curves, and the presence of dark matter, shedding new light on the dynamics of the cosmos.

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Elastic and Inelastic Scattering in Orbital Clustering

Cited by 41 publications

References 0 publications

Dynamics of Lunar Origin and Orbital Evolution

Dynamics of Lunar Origin and Orbital Evolution

Charged dust in Saturn's magnetosphere

Dark matter effects explanation with the torsion in the Minkowski space

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