2015 Fiscal Year Final Research Report
Probing theoretical models of dark energy from latest observations
| Project/Area Number |
24540286
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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 | Tokyo University of Science |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Keywords | 暗黒エネルギー / 修正重力理論 / 宇宙背景輻射 / 宇宙の大規模構造 / 暗黒物質 / インフレーション / 重力波 |
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| Outline of Final Research Achievements |
From the observations of supernovae it is known that the present Universe is accelerating, but the origin of cosmic acceleration has not been identified yet. To reveal the origin of dark energy, I constructed a general theoretical framework for dealing with dark energy models in modified gravitational theories. In such a general scheme I studied the cosmic expansion history, the evolution of density perturbations, and the gravitational couplings in the solar system, which is vey useful to distinguish between theoretical models of dark energy. In addition, we placed constraints on each dark energy model from the observations of supernovae, cosmic microwave background, and large-scale structures.
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| Free Research Field |
宇宙論，一般相対論
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