2013 Fiscal Year Final Research Report
Theoretical study on the origin and evolution of small icy bodies in the solar system
| Project/Area Number |
22340125
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Solid earth and planetary physics
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| Research Institution | Kobe University |
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Principal Investigator |
OHTSUKI Keiji 神戸大学, 理学(系)研究科(研究院), 教授 (00250910)
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| Co-Investigator(Kenkyū-buntansha) |
ARAKAWA Masahiko 神戸大学, 大学院理学研究科, 教授 (10222738)
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| Co-Investigator(Renkei-kenkyūsha) |
DAISAKA Hiroshi 一橋大学, 大学院商学研究科・准教授, 准教授 (80399295)
TANIGAWA Takayuki 北海道大学, 低温科学研究所, 博士研究員 (30422554)
TAKEDA Takaaki ヴェイサエンターテイメント, 研究員 (70413961)
SUETSUGU Ryo 神戸大学, 大学院理学研究科, 大学院生
YASUI Yuki 神戸大学, 大学院理学研究科, 大学院生
FUJITA Tetsuya 神戸大学, 大学院理学研究科, 大学院生
HYODO Ryuki 神戸大学, 大学院理学研究科, 大学院生
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Keywords | 衛星 / リング / 巨大惑星 |
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| Research Abstract |
First, we examined temporary capture of planetesimals by a giant planet, which likely played an important role in capture of irregular satellites of giant planets. Using numerical simulations, we investigated capture rates as well as their dependence on various orbital parameters. Our results suggest that the source region of some of the prograge irregular satellites of Jupiter corresponds to the Hilda region. Next, we examined the process of particle accretion and collisional disruption of aggregates in the tidal environment. We obtained the critical radial distance for particle accretion, and clarified the condition for disruption. Finally, we examined capture of planetesimals by the circumplanetary gas disk of a growing giant planet, which is important in relation to the origin of regular satellites of giant planets. We obtained capture rates and also investigated their dependence on various parameters.
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