2019 Fiscal Year Annual Research Report
Evolution of star clusters: from star fromation to gravitational wave emission
| Project/Area Number |
19F19317
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| Research Institution | The University of Tokyo |
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Principal Investigator |
藤井 通子 東京大学, 大学院理学系研究科(理学部), 准教授 (90722330)
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| Co-Investigator(Kenkyū-buntansha) |
WANG LONG 東京大学, 大学院理学系研究科(理学部), 外国人特別研究員
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| Project Period (FY) |
2019-11-08 – 2022-03-31
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| Keywords | numerical simulations / stellar dynamics / star formation / binary stars / star cluster / N-body simulation / stellar multiplicity |
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| Outline of Annual Research Achievements |
The numerical simulations of massive star clusters with many binaries are challenging due to the time-consuming calculation. We have developed the slow-down algorithmic regularization code that can efficient and accurately handle the few-body interactions which are the most time-consuming part in the simulations. By using this code, we developed the PeTar code, which is the currently fastest N-body code that can accurately model the star cluster evolution. We also implement the interface to using the stellar evolution code (SSE/BSE), the hydrodynamics code (Asura-bridge) and the general framework of N-body simulations (AMUSE). This enlarges the range of applications that the PeTar can handle. We expect this code will become one of the most useful software for stellar dynamics.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
We have developed a new N-body code for stellar dynamics, PeTar. We have finished some test calculations. We also implemented the interface to using the stellar evolution code (SSE/BSE), the hydrodynamicd code (Asura-bridge), and the general framework of N-body simulations (AMUSE). This enlarges the range of applications that the PeTar can handle. The code development is the first step of the research and the progress is under the expectation.
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| Strategy for Future Research Activity |
After the test of the stellar evolution package and hydrodynamics interface. We plan to use the PeTar code to carry the long-term evolution of massive globular clusters, focusing on the long-term effect of changing IMF and primordial binaries, the results will be used to study the star formation in the birth phase of the Milky Way. On the other hand, by using Asura-bridge and PeTar, we want to study how the stellar dynamics, especially how the ejection and mergers of massive OB stars, affect the feedback of star formation. This will help to understand the origin of multiple stellar populations in the Orion Nebular Cluster and globular clusters. The massive simulations will be carried out on the computing clusters including Cray XC-50 in CfCA, NAOJ and ITO, Kyushu University.
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Research Products
(10 results)
