A study for probing string-inspired gravity with primordial gravitational waves
| Project/Area Number |
26800115
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Hirosaki University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 宇宙物理 / 宇宙論 / 重力理論 / 重力波 / 素粒子論 / 理論天文学 |
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| Outline of Final Research Achievements |
In this study, we performed fundamental analyses for probing string-inspired gravity using primordial gravitational waves from the early inflationary universe. As a model for gravity, we introduced a Weyl-curvature correction term in the form of the so-called Bach tensor to the Einstein equations. We analysed time evolution of metric perturbations in this theory from around the onset of inflation to the present epoch. We also found an expression for the energy density of gravitational waves appropriate for the considered theory.
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Report
(3 results)
Research Products
(3 results)
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[Presentation] Perturbations of Kasner-de Sitter spacetime2015
Author(s)
Yu Furuya, Yuki Niiyama, Yuuiti Sendouda
Organizer
The 25th Workshop on General Relativity and Gravitation in Japan
Place of Presentation
Yukawa Institute for Theoretical Physics, Kyoto University
Year and Date
2015-12-07
Related Report
Int'l Joint Research
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