Abstracts for fall meeting of the Japanese Society for Planetary Science
Abstracts 2007 Fall meeting of the Japanese Society for Planetary Sciences
Session ID : 206
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Oral Session 5: Formation Process I
Sep. 26, 9:00-10:39
Planetesimal Formation through Dust Direct Growth
*Hidekazu TanakaToru SuyamaKoji WadaHiroshi Kobayashi
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
We examine planetesimal formation through direct dust growth. Our group showed that icy dust aggregates stick to each other at their collision for an impact velocity less than several tens m/sec. Thus it is worthwhile to examine planetesimal formation through direct dust growth. We compare the growth time of dust with the time scale of dust falling to the sun. As a result, we found that dust aggregates can grow before their falling if they settle to the mid-plane of gaseous disks. When dust aggregates grow to km-size, their self-gravity is effective and the mode of their growth would change to runaway.
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© 2007 The Japanese Society for Planetary Sciences
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