Features around embedded moonlets in Saturn's rings: The role of self-gravity and particle size distributions

Icarus ◽  
2009 ◽  
Vol 199 (2) ◽  
pp. 387-412 ◽  
Author(s):  
Mark C. Lewis ◽  
Glen R. Stewart
Keyword(s):  
Particle Size ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Saturn’S Rings ◽  
Self Gravity ◽  
Saturn's Rings

Particle size distributions in Saturn's rings from voyager 1 radio occultation

Icarus ◽  
1983 ◽  
Vol 54 (2) ◽  
pp. 189-211 ◽  
Author(s):  
Essam A. Marouf ◽  
G. Leonard Tyler ◽  
Howard A. Zebker ◽  
Richard A. Simpson ◽  
Von R. Eshleman
Keyword(s):  
Particle Size ◽  
Radio Occultation ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Saturn’S Rings ◽  
Saturn's Rings

Saturn's rings: Particle size distributions for thin layer models

Icarus ◽  
1985 ◽  
Vol 64 (3) ◽  
pp. 531-548 ◽  
Author(s):  
Howard A. Zebker ◽  
Essam A. Marouf ◽  
G. Leonard Tyler
Keyword(s):  
Particle Size ◽  
Thin Layer ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Saturn’S Rings ◽  
Saturn's Rings

Textural properties of regoliths on vegetated steep slopes in upland regions, Scotland

1986 ◽  
Vol 77 (3) ◽  
pp. 241-250 ◽  
Author(s):  
J. L. Innes
Keyword(s):  
Particle Size ◽  
Early Stage ◽  
Probability Distributions ◽  
Textural Properties ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Normal Probability ◽  
Log Normal ◽  
Steep Slopes

ABSTRACTThe textural properties of many sediments provide a good indication of their provenance, but surprisingly little information is available on the transitional stages between the breakdown of a rock and the incorporation of the material into a fluvial sediment. These transitional stages are important as certain fractions (particularly the finer ones) may be selectively removed. Regoliths developed on steep slopes represent an early stage in the debris cascade and they are here examined in detail to assess the role of parent lithology on the textural properties of the regolith. There are substantial variations between lithologies, although the majority of regoliths are dominated by coarser fractions and are poorly sorted. Most particle size distributions show some degree of fit to both log-normal probability distributions and Rosin distributions. Differences from these can be ascribed to the processes operating on steep slopes, particularly the influx of sand- and silt-sized material by colluvial processes and the removal of clay-sized material by leaching. The regoliths form a distinct facies type which may be recognisable in the geological record.

scholarly journals The Role of Particle Size in Producing the F- Coronal Scattered Brightness

1996 ◽  
Vol 150 ◽  
pp. 349-352
Author(s):  
R.M. MacQueen ◽  
W.C. Davidson ◽  
I. Mann
Keyword(s):  
Particle Size ◽  
Mie Theory ◽  
Interplanetary Dust ◽  
Dust Particles ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Interplanetary Dust Particles ◽  
Infrared Observations ◽  
Flux Measurements

AbstractMotivated by new infrared observations, we examine the contribution of various size intervals of interplanetary dust particles to visible and infrared scattered radiances of the solar F-corona, employing Mie theory and particle size distributions based upon differing interpretations of lunar microcrater evidence and interplanetary flux measurements.

Aggregate hierarchy in soils

Soil Research ◽  
1991 ◽  
Vol 29 (6) ◽  
pp. 815 ◽  
Author(s):  
JM Oades ◽  
AG Waters
Keyword(s):  
Particle Size ◽  
Potential Role ◽  
Organic Materials ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Plant Debris ◽  
Stabilizing Agents ◽  
Microscopic Studies ◽  
Single Grain

An Alfisol, a Mollisol and an Oxisol were fractionated into different particle sizes after a range of disaggregating treatments from gentle to vigorous. The Alfisol and the Mollisol appeared to break down in steps; macroaggregates >250 �m diameter breaking down to microaggregates 20-250 �m diameter before particles <20 �m were released. Vigorous disruption led to particle size distributions similar to those obtained by classical methods used to determine particle size distributions. The Oxisol was stable to rapid wetting treatments but when aggregate disruption was initiated by vigorous treatments particles <20 �m diameter were released and there was no evidence of aggregate hierarchy. Scanning electron microscopy of particles of different sizes showed distinctly single grain particles and aggregates. The microscopic studies indicated the potential role of roots and hyphae in the stabilization of larger aggregates, and for fragments of roots as nuclei for smaller aggregates. Plant debris was not visible in aggregates <20 �m but clay microstructure was evident. It is suggested that aggregate hierarchy occurs in Alfisols and Mollisols because organic materials are the dominant stabilizing agents in larger aggregates but in the Oxisol oxides are dominant stabilizing agents and prevent the expression of aggregate hierarchy caused by organic materials.

Sign in / Sign up

Export Citation Format

Share Document