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Growth and Form of Planetary Seedlings: Results from a Sounding Rocket Microgravity Aggregation Experiment

Maya Krause and Jürgen Blum
Phys. Rev. Lett. 93, 021103 – Published 9 July 2004
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Abstract

In a second microgravity experiment on the formation of dust agglomerates by Brownian motion-induced collisions we find that the agglomerates have fractal dimensions as low as 1.4. Because of much better data, we are now able to derive the diffusion constant of the agglomerates as a function of mass, to show that a power law with an exponent of 1.7 describes the temporal evolution of the mean agglomerate mass very well and to prove that the collision cross section is proportional to the geometrical cross section. In addition to that we derived the universal mass-distribution function of the agglomerates.

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  • Received 6 February 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.021103

©2004 American Physical Society

Authors & Affiliations

Maya Krause

  • Astrophysikalisches Institut und Universitätssternwarte, Friedrich-Schiller-Universität Jena, Schillergässchen 2, 07745 Jena, Germany

Jürgen Blum*

  • Institut für Geophysik und Extraterrestrische Physik, Technische Universität zu Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany

  • *To whom correspondence should be addressed. Email address: j.blum@tu-bs.de

See Also

Sowing the Seeds of Planets

Robert Irion
Phys. Rev. Focus 14, 2 (2004)

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Vol. 93, Iss. 2 — 9 July 2004

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