| Project/Area Number |
25400279
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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 |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Konan University |
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Principal Investigator |
Susa Hajime 甲南大学, 理工学部, 教授 (00323262)
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| Co-Investigator(Renkei-kenkyūsha) |
HASEGAWA Kenji 名古屋大学, 大学院理学研究科, 助教 (20536627)
TOMINAGA Nozomu 甲南大学, 理工学部, 准教授 (00550279)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 初代星 / 形成 / 輻射流体 / 宇宙論 / 星形成 / 初期質量関数 / 輻射流体計算 |
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| Outline of Final Research Achievements |
We perform radiation hydrodynamics numerical simulations to study the birth of the first stars. We find the mass of the stars found in our simulations are in the range of 1Msun < M < 300 Msun, peaking at several x 10 Msun. We also find some fraction of the low mass stars are ejected to the outer envelope of the host minihalos. As a result, they remain less massive since they do not accrete the ambient gas efficiently. In addition, if low mass stars with M < 0.8Msun are born, which could survive until today, we find that the previously reported obsevations already put a constraint on the theory that the number of survived low mass stars per minihalo has to be less than O(1).
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