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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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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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 / ダークエネルギー / 宇宙の加速膨張 / スカラーテンソル理論 / 宇宙論的摂動 / スカラー場 / ヴァインシュタイン機構 / 密度揺らぎ / 再加熱 / クインテッセンス / 非ガウス性 |
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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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Report
(5 results)
Research Products
(61 results)
