[meteorite-list] Science article on Stardust samples

From: Darren Garrison <cynapse_at_meteoritecentral.com>
Date: Thu, 25 Oct 2007 22:59:53 -0400
Message-ID: <htl2i3995oqjtr6h2v01aprniocr61sbni_at_4ax.com>

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http://www.sciencemag.org/cgi/content/abstract/318/5850/613

Science 26 October 2007:
Vol. 318. no. 5850, pp. 613 - 615
DOI: 10.1126/science.1147273

Reports
Outward Transport of High-Temperature Materials Around the Midplane of the Solar
Nebula
Fred J. Ciesla
The Stardust samples collected from Comet 81P/Wild 2 indicate that large-scale
mixing occurred in the solar nebula, carrying materials from the hot inner
regions to cooler environments far from the Sun. Similar transport has been
inferred from telescopic observations of protoplanetary disks around young
stars. Models for protoplanetary disks, however, have difficulty explaining the
observed levels of transport. Here I report the results of a new two-dimensional
model that shows that outward transport of high-temperature materials in
protoplanetary disks is a natural outcome of disk formation and evolution. This
outward transport occurs around the midplane of the disk.
Received on Thu 25 Oct 2007 10:59:53 PM PDT