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The role of sticky interstellar organic material in the formation of asteroids

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Title: The role of sticky interstellar organic material in the formation of asteroids
Authors: Kudo, T. Browse this author
Kouchi, A. Browse this author →KAKEN DB
Arakawa, M. Browse this author
Nakano, H. Browse this author
Issue Date: Dec-2002
Publisher: The University of Arizona
Journal Title: Meteoritics & Planetary Science
Volume: 37
Issue: 12
Start Page: 1975
End Page: 1983
Abstract: Collision experiments and measurements of viscoelastic properties were performed involving an interstellar organic material analogue to investigate the growth of organic grains in the protosolar nebula. The organic material was found to be stickiest at a radius of between 2.3 and 3.0 AU, with a maximum sticking velocity of 5 m s-1 for millimeter-size organic grains. This stickiness is considered to have resulted in the very rapid coagulation of organic grain aggregates and subsequent formation of planetesimals in the early stage of the turbulent accretion disk. The planetesimals formed in this region appear to be represent achondrite parent bodies. In contrast, the formation of planetesimals at <2.1 and >3.0 AU begins with the establishment of a passive disk because silicate and ice grains are not as sticky as organic grains.
Type: article (author version)
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 香内 晃

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