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| Paper: |
Grain Growth and Coagulation |
| Volume: |
309, Astrophysics of Dust |
| Page: |
369 |
| Authors: |
Blum, J. |
| Abstract: |
In the past years, several dust coagulation and aggregation experiments were carried out in the laboratory as well as under microgravity conditions. Considerable progress has been achieved in our understanding of the conditions under which dust grows (i.e. coagulates or agglomerates) in protoplanetary disks. We now have a fairly good idea of the adhesion forces and the sticking probabilities of dust grains as well as of the structural and temporal evolution of dust aggregates. This leads to a well-understood description of the growth and morphology of preplanetary dust agglomerates in the micrometer to decimeter size range. However, the probably most crucial step in preplanetary evolution, the growth from decimeter- to 10-meter-sized bodies, is still not well investigated. Experiments to simulate the growth of macroscopic preplanetary bodies are under way and their first results and implications are discussed. |
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