uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
The physics of protoplanetesimal dust agglomerates: I. Mechanical properties and relations to primitive bodies in the solar system
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Astronomy and Space Physics. (Planetsystemsgruppen)
2006 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 652, no 2, 1768-1781 p.Article in journal (Refereed) Published
Abstract [en]

We present laboratory experiments on the formation of macroscopic dust aggregates. The centimeter-sized highly porous bodies are produced by random ballistic deposition from individual micrometer-sized dust particles. We find packing densities between 0.07 and 0.15 for uncompressed samples, dependent on the shape and size distribution of the constituent dust grains. Impacts into these bodies are simulated by uniaxial compression experiments. We find that the maximum compression, equivalent to the highest protoplanetary impact velocities of similar to 50ms(-1), increases the packing density to 0.20-0.33. Tensile strength measurements with our laboratory samples yield values in the range 200-1100 Pa for slightly compressed samples. We review packing densities and tensile strengths found for primitive solar system bodies, e. g., for comets, primitive meteorites, and meteoroids. We find a consistency between packing densities and tensile strengths of our laboratory samples with those from cometary origin.

Place, publisher, year, edition, pages
2006. Vol. 652, no 2, 1768-1781 p.
Keyword [en]
dust, extinction; methods : laboratory; planetary systems : formation solar; system : formation
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:uu:diva-26568DOI: 10.1086/508017ISI: 000242530100083OAI: oai:DiVA.org:uu-26568DiVA: diva2:54342
Available from: 2007-02-21 Created: 2007-02-21 Last updated: 2011-05-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Davidsson, Björn
By organisation
Department of Astronomy and Space Physics
In the same journal
Astrophysical Journal
Astronomy, Astrophysics and Cosmology

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 140 hits
ReferencesLink to record
Permanent link

Direct link