| Project/Area Number |
11101002
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| Research Category |
Grant-in-Aid for Specially Promoted Research
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| Allocation Type | Single-year Grants |
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| Review Section |
Physics
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| Research Institution | National Astronomical Observatory |
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Principal Investigator |
KAWABE Ryohei National Astronomical Observatory, Division of Radio Astronomy, Professor, 電波天文学研究系, 教授 (10195141)
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| Co-Investigator(Kenkyū-buntansha) |
KOHNO Kohtaro University of Tokyo, Institute of Astronomy, Associate Professor, 理学部・天文学教育研究センター, 助教授 (80321587)
KITAMURA Yoshimi National Astronomical Observatory, Institute of Space and Astronautical Science Space Science Research Division, Associate Professor, 助教授 (30183792)
TAKANO Toshiaki Chiba University, Graduate School of Science and Technology, Associate Professor, 大学院・自然科学研究科, 教授 (40183058)
IDA Shigeru Tokyo Institute of Technology, Graduate School of Science and Engineering, Associate Professor, 大学院・理工学研究科, 助教授 (60211736)
NAKAMURA Ryosuke National Space Development Agency of JAPAN, Earth Observation Research Center, Research Fellow, 地球観測データ解析研究システム, 研究員
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| Project Period (FY) |
1999 – 2003
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| Keywords | Sub-millimeter observation / Radio Interferometry / Planet Formation / Solar System Formation / Extra-Solar Planets / Southern Hemisphere / Superconducting Heterodyne Receivers |
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| Research Abstract |
We tried to construct and consolidate planet formation scenario by interferometric observations in sub-millimeter wavelength and by the cooperative theoretical study of planet formation. For observational study, we tried to investigate formation and evolution process of the proto planetary disks, and tried to make constraints on the gas and dust dispersing time scale in the disks, which are important parameters related to giant gaseous planets and earth-like planets, respectively. Theoretically, we tried to establish our original paradigm which was made to explain the variety of planetary systems.
Sub-millimeter interferometry was successfully achieved using existing Nobeyama millimeter array (NMA). The sub-mm observations of planet forming regions could not performed, but this experience was very valuable for the achievement of the first 10m sub-millimeter telescope in the southern hemisphere (Chile). On the other hand, 1.3mm & 2mm observations of planet forming regions in Taurus with NMA revealed very important facts that proto planetary disk is formed in the protostar phase, and that the proto planetary disk evolves in course of evolution of central star (that is, its radius changes due to viscosity). The variety of physical natures of proto planetary disks was also revealed with observations. Theoretical works revealed that the paradigm is well consistent with the numerical simulation based on theoretically confirmed physical processes, and that extra-solar planets discovered so far can be reproduced and well explained by the paradigm. The dispersing timescales were obtained by another theoretical work and the result for dust was consistent with the observational data taken so far. We are ready for the observational study for determination of gas dispersing timescale with the 10m sub-millimeter antenna in Chile.
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