2015 Fiscal Year Final Research Report
Gravitational Constant and Astrophysics
| Project/Area Number |
24540287
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Nihon University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2012-04-01 – 2016-03-31
|
| Keywords | 重力理論 / 宇宙背景放射 |
|---|
| 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.
|
| Free Research Field |
宇宙物理学
|
