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Momentum transfer to fluffy dust aggregates from stellar winds

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Title: Momentum transfer to fluffy dust aggregates from stellar winds
Authors: Minato, T. Browse this author
Kohler, M. Browse this author
Kimura, H. Browse this author
Mann, I. Browse this author
Yamamoto, T.5 Browse this author →KAKEN DB
Authors(alt): 山本, 哲生5
Keywords: stars : wind
interplanetary medium
Kuiper Belt
solar wind
circumstellar matter
Issue Date: Jun-2006
Journal Title: Astronomy & Astrophysics
Volume: 452
Issue: 2
Start Page: 701
End Page: 707
Publisher DOI: 10.1051/0004-6361:20054774
Abstract: Aims. Dust-plasma interaction may play a dominant role in the dynamics of dust particles around young main-sequence stars. Circumstellar dust is expected to be an aggregate consisting of small grains. The momentum transfer cross section (MTCS) for an aggregate is a key quantity for determining the lifetimes of circumstellar dust disks. Methods. We formulate the MTCS of fluffy dust aggregates and propose an algorithm for computing the MTCS. We compare the magnitude of the plasma and photon Poynting-Roberson effects (PR effects). Results. We find an empirical formula that approximates numerical results well for the MTCSs. A comparison of the magnitudes of the PR effects shows that the lifetime of debris dust around young main-sequence stars is shorter by orders of magnitude than the lifetime estimated by considering the photon PR effect alone. Brief discussion is given on the plasma PR effect for dust debris disks around young main-sequence stars.
Rights: The original publication is available at
Type: article
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: 山本 哲生

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