Pre-accretional sorting of grains in the outer solar nebula

Wozniakiewicz, Penelope J. and Bradley, J.P. and Ishii, H.A. and Price, M.C. and Brownlee, D.E. (2013) Pre-accretional sorting of grains in the outer solar nebula. Astrophysical Journal, 779 (2). ISSN 0004-637X. E-ISSN 1538-4357. (doi:https://doi.org/10.1088/0004-637X/779/2/164) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1088/0004-637X/779/2/164

Abstract

Despite their micrometer-scale dimensions and nanogram masses, chondritic porous interplanetary dust particles (CP IDPs) are an important class of extraterrestrial material since their properties are consistent with a cometary origin and they show no evidence of significant post-accretional parent body alteration. Consequently, they can provide information about grain accretion in the comet-forming region of the outer solar nebula. We have previously reported our comparative study of the sizes and size distributions of crystalline silicate and sulfide grains in CP IDPs, in which we found these components exhibit a size-density relationship consistent with having been sorted together prior to accretion. Here we extend our data set and include GEMS (glass with embedded metal and sulfide), the most abundant amorphous silicate phase observed in CP IDPs. We find that while the silicate and sulfide sorting trend previously observed is maintained, the GEMS size data do not exhibit any clear relationship to these crystalline components. Therefore, GEMS do not appear to have been sorted with the silicate and sulfide crystals. The disparate sorting trends observed in GEMS and the crystalline grains in CP IDPs present an interesting challenge for modeling early transport and accretion processes. They may indicate that several sorting mechanisms operated on these CP IDP components, or alternatively, they may simply be a reflection of different source environments. © 2013. The American Astronomical Society. All rights reserved..

Item Type: Article
Additional information: Unmapped bibliographic data: C7 - 164 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Astrophys. J. [Field not mapped to EPrints] AD - Earth Sciences Department, Mineral and Planetary Science Division, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, Livermore, CA 94550, United States [Field not mapped to EPrints] AD - Department of Astronomy, University of Washington, Seattle, WA 98195, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints] M3 - Article [Field not mapped to EPrints]
Uncontrolled keywords: accretion, accretion disks, comets: general, Kuiper belt: general, protoplanetary disks
Subjects: Q Science > QB Astronomy
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Giles Tarver
Date Deposited: 29 Jan 2016 10:12 UTC
Last Modified: 02 Feb 2016 11:27 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/53877 (The current URI for this page, for reference purposes)
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