2011 Fiscal Year Final Research Report
Dependence of extrasolar planetary systems on host stars' metallicity
| Project/Area Number |
20244013
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | Tokyo Institute of Technology |
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Principal Investigator |
IDA Shigeru 東京工業大学, 大学院・理工学研究科, 教授 (60211736)
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| Co-Investigator(Kenkyū-buntansha) |
SATO Bun' ei 東京工業大学, 大学院・理工学研究科, 准教授 (40397823)
WATANABE Junichi 国立天文台, 教授 (50201190)
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| Co-Investigator(Renkei-kenkyūsha) |
KAWAI Nobuyuki 東京工業大学, 大学院・理工学研究科, 教授 (80195031)
GENDA Hidenori 東京大学, 大学院・理学系研究科, 特任助教 (90456260)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 理論天文学 / 系外惑星 |
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| Research Abstract |
More than 750 extrasolar planets have been discovered, as well as more than 2300 candidates by Kepler space telescope, which motivates statistical discussions of planets and planetary systems. Here we investigated dependence of planetary systems on metallicity of the host stars. N-body and fluid dynamical simulations for planet-planet scattering and collisions have been carried out. Combining these results, we also performed Monte Carlo simulations to find that in a metal-rich disk around a metal-rich star, multiple gas giants are formed and they undergo orbital stability to pump up orbital eccentricities. We also promoted radial velocity surveys and construct a transit follow-up network involving amateurs and students to study the problem both from theory and observation.
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[Journal Article] Detection of aLow-eccentricity and Super-massive Planet to the Subgiant HD2010
Author(s)
Harakawa, H., Sato, B., Fischer, D. A., Ida, S., Omiya, M., Johnson, J. A., Marcy, G. W., Toyota, E., Hori, Y., Howard, A. W.
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Journal Title
Astrophys. J.
Volume: 715
Pages: 550-553
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[Journal Article] A Substellar Companionin a 1. 3 yr Nearly Circular Orbit of HD167602009
Author(s)
Sato, B., Fischer, D. A., Ida, S., Harakawa, H., Omiya, M., Johnson, J. A., Marcy, G. W., Toyota, E., Hori, Y., Isaacson, H., Howard, A. W., Peek, K. M. G.
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Journal Title
Astrophys. J.
Volume: 703
Pages: 671-674
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