Study of the interaction between oscillation and the rotation of stars based on rosette modes
| Project/Area Number |
26400219
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Takata Masao 東京大学, 大学院理学系研究科(理学部), 助教 (20334245)
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| Co-Investigator(Kenkyū-buntansha) |
斉尾 英行 東北大学, 理学研究科, 名誉教授 (10162174)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 恒星振動 / 回転 / 恒星自転 / 恒星内部構造 / 脈動変光星 / 星震学 |
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| Outline of Final Research Achievements |
The purpose of this project is to examine theoretically the properties of a unique type of oscillation eigenmodes of rotating stars, the rosette modes, which have recently been discovered in the numerical simulation. There are two main results: (1) clarification of the physical process of the mode formation, and (2) demonstration of the observability of the modes in real stars. As for (1), it has turned out that the interaction caused by the Coriolis force among the multiple eigenmodes, which have close frequencies in the absence of rotation, induces the unique structure of the modes. Concerning (2), we have shown that the modes can be excited in some B-type main-sequence stars by performing the numerical calculations based on evolutionary stellar models.
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Report
(5 results)
Research Products
(27 results)
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[Presentation] 大質量星の回転と進化2015
Author(s)
斉尾英行
Organizer
「大質量星の進化・活動現象と星の回転」研究会
Place of Presentation
北海道大学（北海道・札幌市）
Year and Date
2015-02-18 – 2015-02-20
Related Report
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