2012 Fiscal Year Final Research Report
Theoretical study on an unified process of planetesimal formation and accumulation
| Project/Area Number |
22540242
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Hokkaido University |
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Principal Investigator |
TANAKA Hidekazu 北海道大学, 低温科学研究所, 准教授 (00282814)
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| Research Collaborator |
KOBAYASHI Hiroshi 名古屋大学, 理学研究科, 特任助教 (40422761)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 理論天文学学 / 惑星形成 |
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| Research Abstract |
We investigated the growth process from dust grains to planetesimals and their radial migration, taking into account the evolution of their internal density. Because of their radial migration, solid bodies are concentrated inside of 10AU and grow to km-sized planetesimals. In this planetesimal-forming region, the surface density of the solid component is enhanced by a factor of ～10, compared with the original value. The growing solid bodies have a highly porous structure, which helps their growth to planetesimals. The large enhancement in the solid surface density accelerates growth of cores of Jovian planets.
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