Gravitational Constant and Astrophysics
| Project/Area Number |
24540287
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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 | Nihon University |
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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 |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 重力理論 / 宇宙背景放射 / ダークエネルギー |
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| Outline of Final Research Achievements |
We put constraints on the time variation of the gravitational constant from the analysis of the temperature and polarization spectra of the fluctuation of the cosmic microwave background measured by the Planck satellite. The time variation of the gravitational constant between the recombination epoch and the present time is constrained to be less than 0.48%, which is order-of-magnitude improvement over our previous result using the WMAP data.
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Report
(5 results)
Research Products
(19 results)
