2016 Fiscal Year Final Research Report
Revolving Theory of Star Formation
| Project/Area Number |
23244027
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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 | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
Machida Masahiro N. 九州大学, 大学院・理学研究院, 准教授 (10402786)
Matsumoto Tomoaki 法政大学, 人間環境学部, 教授 (60308004)
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| Project Period (FY) |
2011-04-01 – 2016-03-31
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| Keywords | 星形成 / 惑星形成 / 星間媒質 / 分子雲 / 磁気流体力学 / 系外惑星 / 電離領域 / 初期質量関数 |
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| Outline of Final Research Achievements |
We investigated important processes in various stages of star formation, starting from the formation of molecular clouds from warm atomic medium, covering to the formation of protostars and protoplanetary disks. Based on those result we proposed an integrated scenario of star formation processes in our galaxy, which explains most of important observational aspects, such as cloud-to-cloud velocity dispersion, and the mass function of molecular cloud cores, star formation efficiency, and gas depletion timescale. We also investigated two kinds of new planet formation scenario: one is hybrid model that combine gravitational instability and core-accretion model. The other is based on secular gravitational instability. Our paper on the latter process resulted in the prediction of multiple ring-like structure in the protoplanetary disks prior to the discovery of multiple ring structure in HL-Tau disk by ALMA. This process is supposed to be important in creating so-called debris disks.
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| Free Research Field |
宇宙物理学
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