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Particle Size Distributions Obtained Through Unfolding 2D Sections: Towards Accurate Distributions of Nebular Solids in the Allende MeteoriteSize distributions of nebular solids in chondrites suggest an efficient sorting of these early forming objects within the protoplanetary disk. The effect of this sorting has been documented by investigations of modal abundances of CAIs (e.g., [1-4]) and chondrules (e.g., [5-8]). Evidence for aerodynamic sorting in the disk is largely qualitative, and needs to be carefully assessed. It may be a way of concentrating these materials into planetesimal-mass clumps, perhaps 100 fs of ka after they formed. A key parameter is size/density distributions of particles (i.e., chondrules, CAIs, and metal grains), and in particular, whether the radius-density product (rxp) is a better metric for defining the distribution than r alone [9]. There is no consensus between r versus rxp based models. Here we report our initial tests and preliminary results, which when expanded will be used to test the accuracy of current dynamical disk models.
Document ID
20120001835
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Christoffersen, P. A. (Saint Lawrence Univ. Canton, NY, United States)
Simon, Justin I. (NASA Johnson Space Center Houston, TX, United States)
Ross, D. K. (NASA Johnson Space Center Houston, TX, United States)
Friedrich, J. M. (Fordham Univ. Bronx, NY, United States)
Cuzzi, J. N. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 25, 2013
Publication Date
January 1, 2012
Subject Category
Geophysics
Report/Patent Number
JSC-CN-25638
Meeting Information
Meeting: 43rd Lunar aud Plauetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 19, 2012
End Date: March 23, 2012
Sponsors: Lunar and Planetary Inst.
Distribution Limits
Public
Copyright
Public Use Permitted.

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